1、如何通过路由的方式打开半屏？
统一使用组件导航(Navigation)的形式去操作，文章里面参考页面显示类型NavDestinationMode.DIALOG：组件导航
2、有没有Grid onItemDragStart时间设置替代方案、以及多列Grid Item实现通用示例？
Grid设置拖动时onItemDragStart默认时间是170毫秒，目前无法设置onItemDragStart的时间，可以通过自定义Grid，设置长按手势LongPressGesture中的duration时长，来实现控制GridItem拖拽的长按触发时间功能。
import { curves } from '@kit.ArkUI';
@Entry
@Component
struct Page {
// 元素数组
@State numbers: number[] = []
// row 设置网格列数
private str: string = ''
@State row: number = 4
// 元素数组中最后一个元素的索引
@State lastIndex: number = 0;
@State dragItem: number = -1
@State scaleItem: number = -1
@State item: number = -1
private dragRefOffsetx: number = 0
private dragRefOffsety: number = 0
@State offsetX: number = 0
@State offsetY: number = 0
private FIX_VP_X: number = 108
private FIX_VP_Y: number = 120
aboutToAppear() {
for (let i = 1; i <= 110; i++) {
this.numbers.push(i)
}
this.lastIndex = this.numbers.length - 1
// 多列
for (let i = 0; i < this.row; i++) {
this.str = this.str + '1fr '
}
}
itemMove(index: number, newIndex: number): void {
if (!this.isDraggable(newIndex)) {
return
}
let tmp = this.numbers.splice(index, 1)
this.numbers.splice(newIndex, 0, tmp[0])
}
// 向下滑
down(index: number): void {
// 指定固定GridItem不响应事件
if (!this.isDraggable(index + this.row)) {
return
}
this.offsetY -= this.FIX_VP_Y
this.dragRefOffsety += this.FIX_VP_Y
// 多列
this.itemMove(index, index + this.row)
}
// 向下滑(右下角为空)
down2(index: number): void {
if (!this.isDraggable(index + 3)) {
return
}
this.offsetY -= this.FIX_VP_Y
this.dragRefOffsety += this.FIX_VP_Y
this.itemMove(index, index + 3)
}
// 向上滑
up(index: number): void {
if (!this.isDraggable(index - this.row)) {
return
}
this.offsetY += this.FIX_VP_Y
this.dragRefOffsety -= this.FIX_VP_Y
this.itemMove(index, index - this.row)
}
// 向左滑
left(index: number): void {
if (!this.isDraggable(index - 1)) {
return
}
this.offsetX += this.FIX_VP_X
this.dragRefOffsetx -= this.FIX_VP_X
this.itemMove(index, index - 1)
}
// 向右滑
right(index: number): void {
if (!this.isDraggable(index + 1)) {
return
}
this.offsetX -= this.FIX_VP_X
this.dragRefOffsetx += this.FIX_VP_X
this.itemMove(index, index + 1)
}
// 向右下滑
lowerRight(index: number): void {
if (!this.isDraggable(index + this.row + 1)) {
return
}
this.offsetX -= this.FIX_VP_X
this.dragRefOffsetx += this.FIX_VP_X
this.offsetY -= this.FIX_VP_Y
this.dragRefOffsety += this.FIX_VP_Y
this.itemMove(index, index + this.row + 1)
}
// 向右上滑
upperRight(index: number): void {
if (!this.isDraggable(index - (this.row - 1))) {
return
}
this.offsetX -= this.FIX_VP_X
this.dragRefOffsetx += this.FIX_VP_X
this.offsetY += this.FIX_VP_Y
this.dragRefOffsety -= this.FIX_VP_Y
this.itemMove(index, index - (this.row - 1))
}
// 向左下滑
lowerLeft(index: number): void {
if (!this.isDraggable(index + (this.row - 1))) {
return
}
this.offsetX += this.FIX_VP_X
this.dragRefOffsetx -= this.FIX_VP_X
this.offsetY -= this.FIX_VP_Y
this.dragRefOffsety += this.FIX_VP_Y
this.itemMove(index, index + (this.row - 1))
}
// 向左上滑
upperLeft(index: number): void {
if (!this.isDraggable(index - (this.row + 1))) {
return
}
this.offsetX += this.FIX_VP_X
this.dragRefOffsetx -= this.FIX_VP_X
this.offsetY += this.FIX_VP_Y
this.dragRefOffsety -= this.FIX_VP_Y
this.itemMove(index, index - (this.row + 1))
}
// 通过元素的索引，控制对应元素是否能移动排序
isDraggable(index: number): boolean {
return index > -1 //恒成立，所有元素均可移动排序
//return index > 1 //一号二号元素固定，不可移动排序
}
build() {
Column() {
Grid() {
ForEach(this.numbers, (item: number) => {
GridItem() {
Text(item + '')
.fontSize(16)
.width('100%')
.textAlign(TextAlign.Center)
.height(100)
.borderRadius(10)
.backgroundColor(0xFFFFFF)
.shadow(this.scaleItem == item ? {
radius: 70,
color: '#15000000',
offsetX: 0,
offsetY: 0
} :
{
radius: 0,
color: '#15000000',
offsetX: 0,
offsetY: 0
})
.animation({ curve: Curve.Sharp, duration: 300 })
}
.onAreaChange((oldVal, newVal) => {
// 多列
this.FIX_VP_X = Math.round(newVal.width as number)
this.FIX_VP_Y = Math.round(newVal.height as number)
})
// 指定固定GridItem不响应事件
.hitTestBehavior(this.isDraggable(this.numbers.indexOf(item)) ? HitTestMode.Default : HitTestMode.None)
.scale({ x: this.scaleItem == item ? 1.05 : 1, y: this.scaleItem == item ? 1.05 : 1 })
.zIndex(this.dragItem == item ? 1 : 0)
.translate(this.dragItem == item ? { x: this.offsetX, y: this.offsetY } : { x: 0, y: 0 })
.padding(10)
.gesture(
// 以下组合手势为顺序识别，当长按手势事件未正常触发时则不会触发拖动手势事件
GestureGroup(GestureMode.Sequence,
LongPressGesture({ repeat: true, duration: 50 })//控制触发拖动的长按事件的时间，默认500毫秒，设置小于0为默认值，这里设置为50毫秒
.onAction((event?: GestureEvent) => {
animateTo({ curve: Curve.Friction, duration: 300 }, () => {
this.scaleItem = item
})
})
.onActionEnd(() => {
animateTo({ curve: Curve.Friction, duration: 300 }, () => {
this.scaleItem = -1
})
}),
PanGesture({ fingers: 1, direction: null, distance: 0 })
.onActionStart(() => {
this.dragItem = item
this.dragRefOffsetx = 0
this.dragRefOffsety = 0
})
.onActionUpdate((event: GestureEvent) => {
this.offsetY = event.offsetY - this.dragRefOffsety
this.offsetX = event.offsetX - this.dragRefOffsetx
animateTo({ curve: curves.interpolatingSpring(0, 1, 400, 38) }, () => {
let index = this.numbers.indexOf(this.dragItem)
// 44 宽度一半 减间距
if (this.offsetY >= this.FIX_VP_Y / 2 &&
(this.offsetX <= this.FIX_VP_X / 2 && this.offsetX >= -this.FIX_VP_X / 2)
&& (index + this.row <= this.lastIndex)) {
// 向下滑
this.down(index)
} else if (this.offsetY <= -this.FIX_VP_Y / 2 &&
(this.offsetX <= this.FIX_VP_X / 2 && this.offsetX >= -this.FIX_VP_X / 2)
&& index - this.row >= 0) {
// 向上滑
this.up(index)
} else if (this.offsetX >= this.FIX_VP_X / 2 &&
(this.offsetY <= this.FIX_VP_Y / 2 && this.offsetY >= -this.FIX_VP_Y / 2)
&& !(((index - (this.row - 1)) % this.row == 0) || index == this.lastIndex)) {
// ) {
// 向右滑
this.right(index)
} else if (this.offsetX <= -this.FIX_VP_X / 2 &&
(this.offsetY <= this.FIX_VP_Y / 2 && this.offsetY >= -this.FIX_VP_Y / 2)
&& !(index % this.row == 0)) {
// 向左滑
this.left(index)
} else if (this.offsetX >= this.FIX_VP_X / 2 && this.offsetY >= this.FIX_VP_Y / 2
&& ((index + this.row + 1 <= this.lastIndex && !((index - (this.row - 1)) % this.row == 0)) ||
!((index - (this.row - 1)) % this.row == 0))) {
// 向右下滑
this.lowerRight(index)
} else if (this.offsetX >= this.FIX_VP_X / 2 && this.offsetY <= -this.FIX_VP_Y / 2
&& !((index - this.row < 0) || ((index - (this.row - 1)) % this.row == 0))) {
// 向右上滑
this.upperRight(index)
} else if (this.offsetX <= -this.FIX_VP_X / 2 && this.offsetY >= this.FIX_VP_Y / 2
&& (!(index % this.row == 0) && (index + (this.row - 1) <= this.lastIndex))) {
// 向左下滑
this.lowerLeft(index)
} else if (this.offsetX <= -this.FIX_VP_X / 2 && this.offsetY <= -this.FIX_VP_Y / 2
&& !((index <= this.row - 1) || (index % this.row == 0))) {
// 向左上滑
this.upperLeft(index)
} else if (this.offsetX >= this.FIX_VP_X / 2 && this.offsetY >= this.FIX_VP_Y / 2
&& (index == this.lastIndex)) {
// 向右下滑(右下角为空)
this.down2(index)
}
})
})
.onActionEnd(() => {
animateTo({ curve: curves.interpolatingSpring(0, 1, 400, 38) }, () => {
this.dragItem = -1
})
animateTo({
curve: curves.interpolatingSpring(14, 1, 170, 17), delay: 150
}, () => {
this.scaleItem = -1
})
})
)
.onCancel(() => {
animateTo({ curve: curves.interpolatingSpring(0, 1, 400, 38) }, () => {
this.dragItem = -1
})
animateTo({
curve: curves.interpolatingSpring(14, 1, 170, 17)
}, () => {
this.scaleItem = -1
})
})
)
}, (item: number) => item.toString())
}
.width('90%')
.editMode(true)
.scrollBar(BarState.Off)
// 多列
.columnsTemplate(this.str)
}.width('100%').height('100%').backgroundColor('#0D182431').padding({ top: 5 })
}
}
3、list、scroll、swipper、web等嵌套使用时存在滑动冲突问题。例如在List中嵌套一个横向滑动的swipe，swipe嵌套一个web，设置手势优先时，web无法和list进行联动交互。
问题原因可能是List组件嵌套Web组件产生了滑动冲突，这里可以使用触摸测试控制来规避此种情况
参考文档：多层级手势事件
4、如何禁止自定义弹窗点击空白处关闭功能？
设置自定义弹框的autoCancel为false，禁止点击空白处关闭弹框。
参考文档：@ohos.promptAction (弹窗)
5、基础手势单击和双击，如何只识别双击而不识别单击？
使用组合手势GestureGroup的互斥识别模式。双击事件需放在单击事件前面，互斥识别是按排列顺序来识别，如果单击事件放前面则只会识别到单击事件。参考文档：组合手势
@Entry
@Component
struct TapGestureExample {
build() {
Column() {
Text('Click twice').fontSize(28)
.gesture(GestureGroup(GestureMode.Exclusive,
// 注意双击放在前面
TapGesture({ count: 2 })
.onAction((event?: GestureEvent) => {
console.log('TapGesture 2')
}),
TapGesture({ count: 1 })
.onAction((event?: GestureEvent) => {
console.log('TapGesture 1')
})
)
)
}
}
}
