iOS开发-实现获取下载主题配置动态切换主题

iOS开发-实现获取下载主题配置更切换主题，主要是通过请求服务端配置的主题配置、下载主题、解压保存到本地。通知界面获取对应的图片及颜色等。

比如新年主题风格，常见的背景显示红色氛围图片、tabbar显示新年风格的按钮样式、导航条显示红色样式等。

一、主题Json对应的model

这里使用JsonModel将主题转成model

model代码如下

SDAppThemeConfigViewModel.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

/**
 Navigation主题样式
 */
@interface SDAppThemeConfigNavViewModel : NSObject

@property (nonatomic, strong) NSString *backgroundColor;
@property (nonatomic, strong) NSString *backgroundImage;

@property (nonatomic, strong) UIImage *t_backgroundImage;

@property (nonatomic, strong) NSString *btnImageColor;
@property (nonatomic, strong) NSString *btnTitleColor;
@property (nonatomic, strong) NSString *navTitleColor;

@property (nonatomic, strong) NSString *showLine;
@property (nonatomic, strong) NSString *lineColor;

@end

/**
 单个tab按钮样式
 */
@interface SDAppThemeConfigTabItemViewModel : NSObject

@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) NSString *titleColor;
@property (nonatomic, strong) NSString *selectedTitleColor;
@property (nonatomic, strong) NSString *icon;
@property (nonatomic, strong) NSString *selectedIcon;

@property (nonatomic, strong) UIImage *t_icon;
@property (nonatomic, strong) UIImage *t_selectedIcon;

@end

/**
 tabbar样式
 */
@interface SDAppThemeConfigTabViewModel : NSObject

@property (nonatomic, strong) NSString *backgroundColor;
@property (nonatomic, strong) NSString *backgroundImage;
@property (nonatomic, strong) NSString *showLine;
@property (nonatomic, strong) NSString *lineColor;
@property (nonatomic, strong) NSString *badgeBgColor;

@property (nonatomic, strong) UIImage *t_backgroundImage;

@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *lianlian;
@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *guangguang;
@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *message;
@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *shop;
@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *mine;

@end

/**
 将本地的主题config.json转成viewmodel
 */
@interface SDAppThemeConfigViewModel : NSObject

@property (nonatomic, strong) NSString *globalColor;
@property (nonatomic, strong) NSString *globalImage;
@property (nonatomic, strong) SDAppThemeConfigNavViewModel *navigation;
@property (nonatomic, strong) SDAppThemeConfigTabViewModel *tabbar;

@property (nonatomic, strong) UIImage *t_globalImage;

+ (SDAppThemeConfigViewModel *)themeViewModel:(NSString *)themeJson;

+ (SDAppThemeConfigViewModel *)defautThemeViewModel;

@end

SDAppThemeConfigViewModel.m

#import "SDAppThemeConfigViewModel.h"
#import <NSObject+YYModel.h>

/**
 Navigation主题样式
 */
@implementation SDAppThemeConfigNavViewModel

@end

/**
 单个tab按钮样式
 */
@implementation SDAppThemeConfigTabItemViewModel

@end

/**
 tabbar样式
 */
@implementation SDAppThemeConfigTabViewModel

@end

/**
 将本地的主题config.json转成viewmodel
 */
@implementation SDAppThemeConfigViewModel

+ (SDAppThemeConfigViewModel *)themeViewModel:(NSString *)themeJson {
    return [SDAppThemeConfigViewModel modelWithJSON:themeJson];
}

+ (SDAppThemeConfigViewModel *)defautThemeViewModel {
    SDAppThemeConfigViewModel *viewModel = [[SDAppThemeConfigViewModel alloc] init];
    SDAppThemeConfigNavViewModel *navConfigViewModel = [[SDAppThemeConfigNavViewModel alloc] init];
    navConfigViewModel.backgroundColor = @"171013";
    navConfigViewModel.btnImageColor = @"ffffff";
    navConfigViewModel.btnTitleColor = @"ffffff";
    navConfigViewModel.navTitleColor = @"ffffff";
    viewModel.navigation = navConfigViewModel;
    return viewModel;
}

@end

二、实现下载解压主题

2.1 AFNetworking下载

下载使用的是AFNetworking下载功能。AFNetworking是一个轻量级的iOS网络通信类库。

下载代码：

#pragma mark - Http download
/**
 请求下载
 
 @param aUrl aurl
 @param aSavePath aSavePath
 @param aFileName aFileName
 @param aTag aTag
 @param downloadprogress downloadprogress
 @param success success
 @param failure failure
 */
- (void)downloadFileURL:(NSString *)aUrl
               savePath:(NSString *)aSavePath
               fileName:(NSString *)aFileName
                    tag:(NSInteger)aTag
       downloadProgress:(void(^)(CGFloat progress))downloadprogress
                success:(void(^)(NSURLResponse *response,NSString *filePath))success
                failure:(void(^)(HttpError * e))failure {
    
    NSFileManager *fileManger = [NSFileManager defaultManager];
    
    if ([fileManger fileExistsAtPath:[aSavePath stringByAppendingPathComponent:aFileName]]) {
        //文件存在
        return;
    }
    
    //2.确定请求的URL地址
    NSString *requestUrl = [self requestUrlWithPath:aUrl clientType:HttpClientTypeWithOut];

    NSMutableURLRequest *request = [self.httpManager.requestSerializer requestWithMethod:@"GET" URLString:requestUrl parameters:nil error:nil];
    
    __block NSURLSessionDownloadTask *downloadTask = nil;
    
    downloadTask = [self.httpManager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {
        dispatch_async(dispatch_get_main_queue(), ^{
            
            downloadprogress(1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount);
        });
        
    } destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
        return [NSURL fileURLWithPath:aSavePath];
        
    } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
        if(error == nil) {
            success(response,[filePath path]);
        } else {
            //下载失败
            NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
            HttpError *e = [self httpRequestFailure:httpResponse error:error];
            failure(e);
        }
    }];
    
    [downloadTask resume];
}

2.2 判断主题版本是否已经下载

在获取主题版本时候，需要判断主题是否存在，如果存在，则直接获取保存的地址。不存在，下载解压当前版本的主题包。

//判断当前主题版本号下是否存在资源文件夹
    BOOL curThemeExist = [self hasAppThemeVersion:themeModel.curVersion];
    if (!curThemeExist) {
        //如果不存在，重新下载解压
        __block NSString *saveZipPath = [self saveThemeTargetBasePath:themeModel.curVersion];
        __block NSString *themeUnZipPath = [self saveThemeDirBasePath:themeModel.curVersion];
        __block NSString *curDownloadurl = themeModel.curDownloadurl;
        //下载成功
        NSString *afileName = [[NSURL URLWithString:curDownloadurl] lastPathComponent];
        __block NSString *afilePath = [NSString pathWithComponents:@[saveZipPath, afileName]];
        
        [[INHttpClientUtil sharedInstance] downloadFileURL:curDownloadurl savePath:afilePath fileName:afilePath tag:[afilePath hash] downloadProgress:^(CGFloat progress) {
            
        } success:^(NSURLResponse *response, NSString *filePath) {
            //下载成功
            NSString *fileName = [[NSURL URLWithString:curDownloadurl] lastPathComponent];
            NSString *selFilePath = [NSString pathWithComponents:@[saveZipPath, fileName]];
            //准备执行解压方法
            [self onFileSelected:selFilePath unZipPath:themeUnZipPath];

        } failure:^(HttpError *e) {
            NSLog(@"failure request :%@",e);
        }];
    } else {
        //如果存在，直接显示
        __block NSString *saveZipPath = [self saveThemeTargetBasePath:themeModel.curVersion];
        __block NSString *themeUnZipPath = [self saveThemeDirBasePath:themeModel.curVersion];
        __block NSString *curDownloadurl = themeModel.curDownloadurl;
        //下载成功
        NSString *fileName = [[NSURL URLWithString:curDownloadurl] lastPathComponent];
        NSString *filePath = [NSString pathWithComponents:@[saveZipPath, fileName]];
        //准备执行解压方法
        [self unzipCompltion:themeUnZipPath];
    }

2.2 解压zip主题包

将下载的主题包解压，zip包进行解压。

// 解压
- (void)releaseZipFilesWithUnzipFileAtPath:(NSString *)zipPath destination:(NSString *)unzipPath {
    NSError *error;
    // 如果解压成功
    if ([SSZipArchive unzipFileAtPath:zipPath toDestination:unzipPath overwrite:YES password:nil error:&error delegate:self]) {
        // 存储主题的色调
        [self unzipCompltion:unzipPath];
    } else {
        NSLog(@"%@",error);
    }
}

解压完成后得到解压的目录。

2.3 获取到解压的目录地址，将配置的json文件转成对应的model

获取到解压的目录地址，将配置的json文件转成对应的model

/**
 调用解压文件
 
 @param unzipPath 获取地址
 */
- (void)unzipCompltion:(NSString *)unzipPath {
    // 存储主题的色调
    // 已经存储主题tabbar图片、navigationbar图片、配置文件等等资源
    
    NSArray *folders = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:unzipPath error:NULL];
    NSString *selectedFilePath = unzipPath;
    NSString *aPath = [folders lastObject];
    NSString *fullPath = [unzipPath stringByAppendingPathComponent:aPath];
    selectedFilePath = fullPath;
    
    NSString *configPath = [NSString stringWithFormat:@"%@/config.json",selectedFilePath];
    NSFileHandle *fh = [NSFileHandle fileHandleForReadingAtPath:configPath];
    NSData *data = [fh readDataToEndOfFile];
    NSString *jsonStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithDictionary:[SDJsonUtil dictionaryWithJsonString:jsonStr]];
    NSLog(@"theme config.json:%@",dict);
    SDAppThemeConfigViewModel *themeViewModel = [SDAppThemeConfigViewModel themeViewModel:jsonStr];
    themeViewModel.t_globalImage = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.globalImage];
    
    themeViewModel.navigation.t_backgroundImage = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.navigation.backgroundImage];
    
    themeViewModel.tabbar.t_backgroundImage = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.backgroundImage];
    
    themeViewModel.tabbar.lianlian.t_icon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.lianlian.icon];
    
    themeViewModel.tabbar.lianlian.t_selectedIcon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.lianlian.selectedIcon];
    
    themeViewModel.tabbar.guangguang.t_icon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.guangguang.icon];
    
    themeViewModel.tabbar.guangguang.t_selectedIcon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.guangguang.selectedIcon];
    
    themeViewModel.tabbar.message.t_icon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.message.icon];
    
    themeViewModel.tabbar.message.t_selectedIcon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.message.selectedIcon];
    
    themeViewModel.tabbar.mine.t_icon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.mine.icon];
    
    themeViewModel.tabbar.mine.t_selectedIcon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.mine.selectedIcon];
    
    //配置全局主题
    [SDAppThemeManager shareInstance].configViewModel = themeViewModel;
    
    [[NSNotificationCenter defaultCenter] postNotificationName:K_APP_THEME_CHANGED object:nil userInfo:nil];
}

之后通知界面切换对应的图片及风格图。

2.4 界面添加通知Observer

界面接收到通知后，更新到对应的图片及颜色。
我这里是就写一个切换Tabbar新年主题风格图片。

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(systemAppThemeChanged:) name:K_APP_THEME_CHANGED object:nil];

切换Tabbar新年主题风格图片

- (void)updateThemeConfig {
    //主题，可以更改tabbar样式
    SDAppThemeConfigViewModel *themeConfigViewModel = [SDAppThemeManager shareInstance].configViewModel;
    
    UIImage *backgroundImage;
    if (themeConfigViewModel.tabbar.t_backgroundImage) {
        backgroundImage = themeConfigViewModel.tabbar.t_backgroundImage;
    } else {
        NSString *bgColor = themeConfigViewModel.tabbar.backgroundColor;
        backgroundImage = [UIImage imageWithColor:[UIColor colorWithHexString:bgColor] size:CGSizeMake(20.0, 20.0)];
        backgroundImage = [backgroundImage stretchableImageWithLeftCapWidth:backgroundImage.leftCapWidth*0.5 topCapHeight:backgroundImage.topCapHeight*0.5];
    }
    
    self.sdTabbar.bgroundImage = backgroundImage;
    
    NSString *showLine = themeConfigViewModel.tabbar.showLine;
    self.sdTabbar.showLine = [showLine boolValue];
    self.sdTabbar.lineColor = [UIColor colorWithHexString:themeConfigViewModel.tabbar.lineColor];
    
    UIColor *badgeBGColor = [UIColor colorWithHexString:themeConfigViewModel.tabbar.badgeBgColor];

    SDTabbarItem *homeItem = [self themeTabbarItem:themeConfigViewModel.tabbar.lianlian];
    homeItem.identifier = @"home";
    homeItem.badgeColor = badgeBGColor;
    
    SDTabbarItem *addressbookItem = [self themeTabbarItem:themeConfigViewModel.tabbar.message];
    addressbookItem.identifier = @"addressbook";
    addressbookItem.badgeColor = badgeBGColor;

    SDTabbarItem *discoveryItem = [self themeTabbarItem:themeConfigViewModel.tabbar.guangguang];
    discoveryItem.identifier = @"discovery";
    discoveryItem.badgeColor = badgeBGColor;

    SDTabbarItem *mineItem = [self themeTabbarItem:themeConfigViewModel.tabbar.mine];
    mineItem.identifier = @"mine";
    mineItem.badgeColor = badgeBGColor;

    [self.sdTabbar updateTabbarStyle:homeItem];
    [self.sdTabbar updateTabbarStyle:addressbookItem];
    [self.sdTabbar updateTabbarStyle:discoveryItem];
    [self.sdTabbar updateTabbarStyle:mineItem];
}

- (void)systemAppThemeChanged:(NSNotification *)notification {
    [self updateThemeConfig];
}

- (SDTabbarItem *)themeTabbarItem:(SDAppThemeConfigTabItemViewModel *)itemViewModel {
    SDTabbarItem *tabbarItem = [[SDTabbarItem alloc] init];
    tabbarItem.title = itemViewModel.title;
    tabbarItem.titleColor = [UIColor colorWithHexString:itemViewModel.titleColor];
    tabbarItem.selectedTitleColor = [UIColor colorWithHexString:itemViewModel.selectedTitleColor];
    tabbarItem.image = itemViewModel.t_icon;
    tabbarItem.selectedImage = itemViewModel.t_selectedIcon;
    return tabbarItem;
}

tabbar的按钮更新：根据对应的identifier切换到对应的图片及颜色配置。

/**
 更新tabbar样式
 
 @param tabbarItem item
 */
- (void)updateTabbarStyle:(SDTabbarItem *)tabbarItem {
    for (UIView *subView in self.subviews) {
        if ([subView isKindOfClass:[SDTabbarButton class]]) {
            SDTabbarButton *tabbarButton = (SDTabbarButton *)subView;
            SDTabbarItem *item = tabbarButton.tabbarItem;
            if (tabbarItem.identifier && [tabbarItem.identifier isEqualToString:item.identifier]) {
                //更新tabbar
                [item copyClone:tabbarItem];
                tabbarButton.tabbarItem = item;
                break;
            }
        }
    }
}

三、将model序列化存储到本地目录

将主题数据序列号存储到本地目录，方便下次打开APP进行获取。

SDAppThemeConfigDbManager.h

#import <Foundation/Foundation.h>
#import "SDAppThemeManager.h"

@interface SDAppThemeConfigDbManager : NSObject

+ (id)shareInstance;

- (SDAppThemeViewModel *)getAppThemeViewModelFromDb;

- (void)saveAppThemeViewModelToDb:(SDAppThemeViewModel *)info;

@end

SDAppThemeConfigDbManager.m

#import "SDAppThemeConfigDbManager.h"

static NSString *appThemeConfigPath = @"sdAppThemeConfigPath";
static SDAppThemeConfigDbManager *instance = nil;

@implementation SDAppThemeConfigDbManager

+ (id)shareInstance
{
    static dispatch_once_t predicate;
    dispatch_once(&predicate,^{
        instance = [[self alloc] init];
    });
    return instance;
}

- (NSString *)getAppThemeConfigPath
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentPath = [paths objectAtIndex:0];
    NSString *path = [documentPath stringByAppendingPathComponent:appThemeConfigPath];
    
    return path;
}

- (SDAppThemeViewModel *)getAppThemeViewModelFromDb {
    NSString *dataFile = [self getAppThemeConfigPath];
    @try {
        SDAppThemeViewModel *viewModel = [NSKeyedUnarchiver unarchiveObjectWithFile:dataFile];
        if (viewModel) {
            return viewModel;
        }
    } @catch (NSException *e) {
        
    }
    
    return nil;
}

- (void)saveAppThemeViewModelToDb:(SDAppThemeViewModel *)info {
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:info];
    NSString *dataFile = [self getAppThemeConfigPath];
    
    BOOL isSave = [data writeToFile:dataFile atomically:YES];
    if (isSave) {
        NSLog(@"存储成功");
    } else {
        NSLog(@"存储失败");
    }
}

@end

四、完整实现代码

• 需要用到主题Manager：SDAppThemeManager

SDAppThemeManager.h

#import <Foundation/Foundation.h>
//#import "SDThemeConfigRequest.h"
#import "SDAppThemeConfigViewModel.h"

/**
 获取的app主题model，app主题颜色版本号
 */
@interface SDAppThemeViewModel : NSObject<NSCoding>

@property (nonatomic, strong) NSString *curDownloadurl;     //当前版本的下载地址
@property (nonatomic, strong) NSString *curVersion;         //当前app主题颜色版本号

@property (nonatomic, strong) NSString *nextDownloadurl;    //下一版本的下载地址
@property (nonatomic, strong) NSString *nextVersion;        //下一版本app主题颜色版本号

@end

@interface SDAppThemeManager : NSObject

+ (instancetype)shareInstance;

@property (nonatomic, strong) SDAppThemeConfigViewModel *configViewModel; //当前版本控制文件

/**
 从服务器端加载APP主题接口
 */
- (void)loadAppThemeConfig;

/**
 加载系统主题资源
 */
- (void)loadCacheThemeResource;

@end

SDAppThemeManager.m

#import "SDAppThemeManager.h"
#import "SDAppThemeConfigDbManager.h"
#import "SDAppThemeDownloadManager.h"
#import "INHttpClientUtil.h"

@implementation SDAppThemeViewModel

- (id)init {
    self = [super init];
    if (self) {
        
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super init];
    if (self) {
        self.curDownloadurl = [aDecoder decodeObjectForKey:@"kAppThemeCurDownloadurl"];
        self.curVersion = [aDecoder decodeObjectForKey:@"kAppThemeCurVersion"];
        self.nextDownloadurl = [aDecoder decodeObjectForKey:@"kAppThemeNextDownloadurl"];
        self.nextVersion = [aDecoder decodeObjectForKey:@"kAppThemeNextVersion"];
    }
    return self;
}

- (void)encodeWithCoder:(NSCoder *)aCoder
{
    [aCoder encodeObject:_curDownloadurl forKey:@"kAppThemeCurDownloadurl"];
    [aCoder encodeObject:_curVersion forKey:@"kAppThemeCurVersion"];
    [aCoder encodeObject:_nextDownloadurl forKey:@"kAppThemeNextDownloadurl"];
    [aCoder encodeObject:_nextVersion forKey:@"kAppThemeNextVersion"];
}

- (void)clear {
    self.curDownloadurl = nil;
    self.curVersion = nil;
    self.nextDownloadurl = nil;
    self.nextVersion = nil;
}


@end

static SDAppThemeManager *shareInstance = nil;

@implementation SDAppThemeManager

+ (instancetype)shareInstance {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        shareInstance = [[SDAppThemeManager alloc] init];
        shareInstance.configViewModel = [SDAppThemeConfigViewModel defautThemeViewModel];
    });
    return shareInstance;
}

/**
 从服务器端加载APP主题接口
 */
- (void)loadAppThemeConfig {
    [[INHttpClientUtil sharedInstance] getWithClientType:HttpClientTypeDefault url:@"/v1/api/theme/system" params:nil success:^(id responseObj) {
        NSString *code = [NSString stringWithFormat:@"%@",responseObj[@"code"]];
        if ([@"0" isEqualToString:code] && responseObj[@"data"]) {
            NSString *curDownloadurl = responseObj[@"data"][@"curDownloadurl"];
            NSString *curVersion = responseObj[@"data"][@"curVersion"];
            NSString *nextDownloadurl = responseObj[@"data"][@"nextDownloadurl"];
            NSString *nextVersion = responseObj[@"data"][@"nextVersion"];
            
            SDAppThemeViewModel *themeViewModel = [[SDAppThemeViewModel alloc] init];
            themeViewModel.curDownloadurl = nextDownloadurl;
            themeViewModel.curVersion = @"2016.10.27";
            themeViewModel.nextDownloadurl = nextDownloadurl;
            themeViewModel.nextVersion = nextVersion;
            
            [[SDAppThemeConfigDbManager shareInstance] saveAppThemeViewModelToDb:themeViewModel];
            
            [[SDAppThemeDownloadManager shareInstance] downloadThemeZipPackage:themeViewModel];
        }
    } failure:^(HttpError *e) {
        DLog(@"request:%@",e);
    }];
}

/**
 加载系统主题资源
 */
- (void)loadCacheThemeResource {
    [[SDAppThemeDownloadManager shareInstance] loadCacheThemeResource];
}

@end

• 需要用到主题下载类SDAppThemeDownloadManager

SDAppThemeDownloadManager.h

#import <Foundation/Foundation.h>
//#import "SDThemeConfigRequest.h"
#import "SDAppThemeManager.h"
#import "SDAppThemeConfigViewModel.h"
#import "SDAppThemeConfigDbManager.h"

#define K_APP_THEME_CHANGED @"K_APP_THEME_CHANGED"
#define K_DEFAULT_APP_THEME_VERSION @"1.0.0"

@interface SDAppThemeDownloadManager : NSObject

+ (instancetype)shareInstance;

- (void)downloadThemeZipPackage:(SDAppThemeViewModel *)themeModel;

/**
 加载系统主题资源
 */
- (void)loadCacheThemeResource;

@end

SDAppThemeDownloadManager.m

#import "SDAppThemeDownloadManager.h"
#import "SDJsonUtil.h"
//#import "NSString+ext.h"
#import <SSZipArchive/SSZipArchive.h>
#import "SDAppThemeManager.h"
#import "INHttpClientUtil.h"

static SDAppThemeDownloadManager *manager = nil;

@interface SDAppThemeDownloadManager () <SSZipArchiveDelegate>

@end

@implementation SDAppThemeDownloadManager

+ (instancetype)shareInstance {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        manager = [[SDAppThemeDownloadManager alloc] init];
    });
    return manager;
}

- (void)downloadThemeZipPackage:(SDAppThemeViewModel *)themeModel {
    
    //判断当前主题版本号下是否存在资源文件夹
    BOOL curThemeExist = [self hasAppThemeVersion:themeModel.curVersion];
    if (!curThemeExist) {
        //如果不存在，重新下载解压
        __block NSString *saveZipPath = [self saveThemeTargetBasePath:themeModel.curVersion];
        __block NSString *themeUnZipPath = [self saveThemeDirBasePath:themeModel.curVersion];
        __block NSString *curDownloadurl = themeModel.curDownloadurl;
        //下载成功
        NSString *afileName = [[NSURL URLWithString:curDownloadurl] lastPathComponent];
        __block NSString *afilePath = [NSString pathWithComponents:@[saveZipPath, afileName]];
        
        [[INHttpClientUtil sharedInstance] downloadFileURL:curDownloadurl savePath:afilePath fileName:afilePath tag:[afilePath hash] downloadProgress:^(CGFloat progress) {
            
        } success:^(NSURLResponse *response, NSString *filePath) {
            //下载成功
            NSString *fileName = [[NSURL URLWithString:curDownloadurl] lastPathComponent];
            NSString *selFilePath = [NSString pathWithComponents:@[saveZipPath, fileName]];
            //准备执行解压方法
            [self onFileSelected:selFilePath unZipPath:themeUnZipPath];

        } failure:^(HttpError *e) {
            NSLog(@"failure request :%@",e);
        }];
    } else {
        //如果存在，直接显示
        __block NSString *saveZipPath = [self saveThemeTargetBasePath:themeModel.curVersion];
        __block NSString *themeUnZipPath = [self saveThemeDirBasePath:themeModel.curVersion];
        __block NSString *curDownloadurl = themeModel.curDownloadurl;
        //下载成功
        NSString *fileName = [[NSURL URLWithString:curDownloadurl] lastPathComponent];
        NSString *filePath = [NSString pathWithComponents:@[saveZipPath, fileName]];
        //准备执行解压方法
        [self unzipCompltion:themeUnZipPath];
    }
    
    /*
     //判断下一主题版本号下是否存在资源文件夹中
     BOOL nextThemeExist = [self hasAppThemeVersion:themeModel.nextVersion];
     if (!nextThemeExist) {
     //如果不存在，重新下载解压
     __block NSString *saveZipPath = [self saveThemeTargetBasePath:themeModel.nextVersion];
     [[HttpClient sharedInstance] downloadFileURL:themeModel.curDownloadurl savePath:saveZipPath fileName:saveZipPath tag:[saveZipPath hash] success:^(id responseObj) {
     //下载成功
     } failure:^(HttpException *e) {
     //下载失败
     }];
     }
     */
}

// 解压
- (void)releaseZipFilesWithUnzipFileAtPath:(NSString *)zipPath destination:(NSString *)unzipPath {
    NSError *error;
    // 如果解压成功
    if ([SSZipArchive unzipFileAtPath:zipPath toDestination:unzipPath overwrite:YES password:nil error:&error delegate:self]) {
        // 存储主题的色调
        [self unzipCompltion:unzipPath];
    } else {
        NSLog(@"%@",error);
    }
}

/**
 调用解压文件
 
 @param unzipPath 获取地址
 */
- (void)unzipCompltion:(NSString *)unzipPath {
    // 存储主题的色调
    // 已经存储主题tabbar图片、navigationbar图片、配置文件等等资源
    
    NSArray *folders = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:unzipPath error:NULL];
    NSString *selectedFilePath = unzipPath;
    NSString *aPath = [folders lastObject];
    NSString *fullPath = [unzipPath stringByAppendingPathComponent:aPath];
    selectedFilePath = fullPath;
    
    NSString *configPath = [NSString stringWithFormat:@"%@/config.json",selectedFilePath];
    NSFileHandle *fh = [NSFileHandle fileHandleForReadingAtPath:configPath];
    NSData *data = [fh readDataToEndOfFile];
    NSString *jsonStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithDictionary:[SDJsonUtil dictionaryWithJsonString:jsonStr]];
    NSLog(@"theme config.json:%@",dict);
    SDAppThemeConfigViewModel *themeViewModel = [SDAppThemeConfigViewModel themeViewModel:jsonStr];
    themeViewModel.t_globalImage = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.globalImage];
    
    themeViewModel.navigation.t_backgroundImage = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.navigation.backgroundImage];
    
    themeViewModel.tabbar.t_backgroundImage = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.backgroundImage];
    
    themeViewModel.tabbar.lianlian.t_icon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.lianlian.icon];
    
    themeViewModel.tabbar.lianlian.t_selectedIcon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.lianlian.selectedIcon];
    
    themeViewModel.tabbar.guangguang.t_icon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.guangguang.icon];
    
    themeViewModel.tabbar.guangguang.t_selectedIcon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.guangguang.selectedIcon];
    
    themeViewModel.tabbar.message.t_icon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.message.icon];
    
    themeViewModel.tabbar.message.t_selectedIcon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.message.selectedIcon];
    
    themeViewModel.tabbar.mine.t_icon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.mine.icon];
    
    themeViewModel.tabbar.mine.t_selectedIcon = [self imageWithDocumentoryName:[NSString stringWithFormat:@"%@",selectedFilePath] imageName:themeViewModel.tabbar.mine.selectedIcon];
    
    //配置全局主题
    [SDAppThemeManager shareInstance].configViewModel = themeViewModel;
    
    [[NSNotificationCenter defaultCenter] postNotificationName:K_APP_THEME_CHANGED object:nil userInfo:nil];
}

/**
 准备执行解压方法
 
 @param selectedPath 原先文件路径
 @param unZipPath 解压文件路径
 */
- (void)onFileSelected:(NSString *)selectedPath unZipPath:(NSString *)unZipPath {
    NSURL *fileURL = [NSURL fileURLWithPath:selectedPath];
    
    NSString *fileNameComponent = fileURL.lastPathComponent;
    // 获取文件的扩展名
    NSString *extension = [[fileNameComponent pathExtension] lowercaseString];
    // 如果是zip类型的压缩包文件，则进行解压
    if ([extension isEqualToString:@"zip"]) {
        // 设置解压路径
        [self releaseZipFilesWithUnzipFileAtPath:selectedPath destination:unZipPath];
    }
}

/**
 判断当前path路径是否存在
 
 @param themeVersion 主题版本号
 @return 是否文件
 */
- (BOOL)hasAppThemeVersion:(NSString *)themeVersion {
    NSString *pathOfLibrary = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *path = [pathOfLibrary stringByAppendingPathComponent:[NSString stringWithFormat:@"dftheme-%@",themeVersion]];
    
    NSArray *folders = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:NULL];
    
    if (!(folders && folders.count > 0)) {
        return NO;
    }
    
    NSString *aPath = [folders lastObject];
    NSString *fullPath = [path stringByAppendingPathComponent:aPath];
    
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL result = [fileManager fileExistsAtPath:fullPath];
    
    return result;
}

/**
 主题未解压下载目录
 
 @param themeVersion 主题版本号
 @return 最后path
 */
- (NSString *)saveThemeTargetBasePath:(NSString *)themeVersion {
    NSString *pathOfLibrary = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *path = [pathOfLibrary stringByAppendingPathComponent:[NSString stringWithFormat:@"dfThemesZip-%@",themeVersion]];
    [self createDirectory:path];
    return path;
}

/**
 主题解压目录
 
 @param themeVersion 主题版本号
 @return 最后path
 */
- (NSString *)saveThemeDirBasePath:(NSString *)themeVersion {
    NSString *pathOfLibrary = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *path = [pathOfLibrary stringByAppendingPathComponent:[NSString stringWithFormat:@"dftheme-%@",themeVersion]];
    [self createDirectory:path];
    return path;
}

- (void)createDirectory:(NSString *)path {
    NSError *error = nil;
    [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES
                                               attributes:nil error:&error];
    if (error) {
        NSLog(@"Create directory error: %@", error);
    }
}

/**
 获取使用存储在沙盒里的图片
 
 @param documentoryName 文件目录
 @param imageName 图片名字
 @return 图片
 */
- (UIImage *)imageWithDocumentoryName:(NSString *)documentoryName
                            imageName:(NSString *)imageName {
    
    // 如果文件名不存在或者文件名为空，则返回空
    if (!imageName || [imageName isEqualToString:@""]) {
        return nil;
    }
    
    NSString *imgPath = [documentoryName stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",imageName]];
    
    UIImage *image = [UIImage imageWithContentsOfFile:imgPath];
    
    if (image) {
        return image;
    }
    
    return [UIImage imageNamed:imageName];
}

/**
 加载系统主题资源
 */
- (void)loadCacheThemeResource {
    SDAppThemeViewModel *themeVersionViewModel = [[SDAppThemeConfigDbManager shareInstance] getAppThemeViewModelFromDb];
    if (themeVersionViewModel && ![K_DEFAULT_APP_THEME_VERSION isEqualToString:themeVersionViewModel.curVersion]) {
        [self downloadThemeZipPackage:themeVersionViewModel];
    }
}

@end

• 需要用到主题数据：SDAppThemeConfigViewModel

SDAppThemeConfigViewModel.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

/**
 Navigation主题样式
 */
@interface SDAppThemeConfigNavViewModel : NSObject

@property (nonatomic, strong) NSString *backgroundColor;
@property (nonatomic, strong) NSString *backgroundImage;

@property (nonatomic, strong) UIImage *t_backgroundImage;

@property (nonatomic, strong) NSString *btnImageColor;
@property (nonatomic, strong) NSString *btnTitleColor;
@property (nonatomic, strong) NSString *navTitleColor;

@property (nonatomic, strong) NSString *showLine;
@property (nonatomic, strong) NSString *lineColor;

@end

/**
 单个tab按钮样式
 */
@interface SDAppThemeConfigTabItemViewModel : NSObject

@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) NSString *titleColor;
@property (nonatomic, strong) NSString *selectedTitleColor;
@property (nonatomic, strong) NSString *icon;
@property (nonatomic, strong) NSString *selectedIcon;

@property (nonatomic, strong) UIImage *t_icon;
@property (nonatomic, strong) UIImage *t_selectedIcon;

@end

/**
 tabbar样式
 */
@interface SDAppThemeConfigTabViewModel : NSObject

@property (nonatomic, strong) NSString *backgroundColor;
@property (nonatomic, strong) NSString *backgroundImage;
@property (nonatomic, strong) NSString *showLine;
@property (nonatomic, strong) NSString *lineColor;
@property (nonatomic, strong) NSString *badgeBgColor;

@property (nonatomic, strong) UIImage *t_backgroundImage;

@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *lianlian;
@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *guangguang;
@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *message;
@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *shop;
@property (nonatomic, strong) SDAppThemeConfigTabItemViewModel *mine;

@end

/**
 将本地的主题config.json转成viewmodel
 */
@interface SDAppThemeConfigViewModel : NSObject

@property (nonatomic, strong) NSString *globalColor;
@property (nonatomic, strong) NSString *globalImage;
@property (nonatomic, strong) SDAppThemeConfigNavViewModel *navigation;
@property (nonatomic, strong) SDAppThemeConfigTabViewModel *tabbar;

@property (nonatomic, strong) UIImage *t_globalImage;

+ (SDAppThemeConfigViewModel *)themeViewModel:(NSString *)themeJson;

+ (SDAppThemeConfigViewModel *)defautThemeViewModel;

@end

SDAppThemeConfigViewModel.m

#import "SDAppThemeConfigViewModel.h"
#import <NSObject+YYModel.h>

/**
 Navigation主题样式
 */
@implementation SDAppThemeConfigNavViewModel

@end

/**
 单个tab按钮样式
 */
@implementation SDAppThemeConfigTabItemViewModel

@end

/**
 tabbar样式
 */
@implementation SDAppThemeConfigTabViewModel

@end

/**
 将本地的主题config.json转成viewmodel
 */
@implementation SDAppThemeConfigViewModel

+ (SDAppThemeConfigViewModel *)themeViewModel:(NSString *)themeJson {
    return [SDAppThemeConfigViewModel modelWithJSON:themeJson];
}

+ (SDAppThemeConfigViewModel *)defautThemeViewModel {
    SDAppThemeConfigViewModel *viewModel = [[SDAppThemeConfigViewModel alloc] init];
    SDAppThemeConfigNavViewModel *navConfigViewModel = [[SDAppThemeConfigNavViewModel alloc] init];
    navConfigViewModel.backgroundColor = @"171013";
    navConfigViewModel.btnImageColor = @"ffffff";
    navConfigViewModel.btnTitleColor = @"ffffff";
    navConfigViewModel.navTitleColor = @"ffffff";
    viewModel.navigation = navConfigViewModel;
    return viewModel;
}

@end

• 主题配置序列化存储本地：SDAppThemeConfigDbManager

SDAppThemeConfigDbManager.h

#import <Foundation/Foundation.h>
#import "SDAppThemeManager.h"

@interface SDAppThemeConfigDbManager : NSObject

+ (id)shareInstance;

- (SDAppThemeViewModel *)getAppThemeViewModelFromDb;

- (void)saveAppThemeViewModelToDb:(SDAppThemeViewModel *)info;

@end

SDAppThemeConfigDbManager.m

#import "SDAppThemeConfigDbManager.h"

static NSString *appThemeConfigPath = @"sdAppThemeConfigPath";
static SDAppThemeConfigDbManager *instance = nil;

@implementation SDAppThemeConfigDbManager

+ (id)shareInstance
{
    static dispatch_once_t predicate;
    dispatch_once(&predicate,^{
        instance = [[self alloc] init];
    });
    return instance;
}

- (NSString *)getAppThemeConfigPath
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentPath = [paths objectAtIndex:0];
    NSString *path = [documentPath stringByAppendingPathComponent:appThemeConfigPath];
    
    return path;
}

- (SDAppThemeViewModel *)getAppThemeViewModelFromDb {
    NSString *dataFile = [self getAppThemeConfigPath];
    @try {
        SDAppThemeViewModel *viewModel = [NSKeyedUnarchiver unarchiveObjectWithFile:dataFile];
        if (viewModel) {
            return viewModel;
        }
    } @catch (NSException *e) {
        
    }
    
    return nil;
}

- (void)saveAppThemeViewModelToDb:(SDAppThemeViewModel *)info {
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:info];
    NSString *dataFile = [self getAppThemeConfigPath];
    
    BOOL isSave = [data writeToFile:dataFile atomically:YES];
    if (isSave) {
        NSLog(@"存储成功");
    } else {
        NSLog(@"存储失败");
    }
}

@end

至此，实现获取下载主题配置更切换主题的代码实现完成。

五、小结

iOS开发-实现获取下载主题配置更切换主题，主要是通过请求服务端配置的主题配置、下载主题、解压保存到本地。通知界面获取对应的图片及颜色等。

学习记录，每天不停进步。