HarmonyOS 鸿蒙Next获取WindowProperties.drawableRect值都是0

在EntryAbility.ts中，写如下代码

onWindowStageCreate(windowStage: window.WindowStage): void {

let windowClass = windowStage.getMainWindowSync()

let myproperty=windowClass.getWindowProperties()

let myrect=myproperty.drawableRect

…

}

得到的myrect，left,top,width,height都是0，看文档应该是得到可绘制的区域，是不是我哪里搞错了？

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zlyuanteng 1楼•17 天前

参考如下demo：

[@Entry](/user/Entry)
[@Component](/user/Component)
struct ScrollImagePage {
scroller: Scroller = new Scroller()
[@State](/user/State) winHeight: Length = ''
[@State](/user/State) viewHeight: Length = ''
[@State](/user/State) offsetY: Length = ''
aboutToAppear(): void {
window.getLastWindow(getContext(this), (err, win) => {
let prop = win.getWindowProperties()
this.winHeight = prop.drawableRect.height // px
});
}
build() {
Scroll(this.scroller) {
Column() {
Text(‘第一个View’).height(400).backgroundColor(Color.Orange)
Text(‘第二个View’).height(400).backgroundColor(Color.Green)
Image($r(‘app.media.app_icon’)).height(400)
.onAreaChange((oldValue: Area, newValue: Area) => {
this.viewHeight = vp2px(Number(newValue.height)) // 将vp转成px
if (newValue.globalPosition.y) {
this.offsetY = vp2px(Number(newValue.globalPosition.y)) // 将vp转成px
}
})
Text(‘第三个View’).height(400).backgroundColor(Color.Blue)
Text(‘文本’).height(400)
}
.width(‘100%’)
}
.onScrollStop(() => {
// 91指的是导航条的高度，126指的是状态栏的高度，通过on(‘avoidAreaChange’)方法获取
let diff = Number(this.winHeight) - Number(this.viewHeight) - 91
if (this.offsetY > 126 && this.offsetY < diff) {
console.log('onScrollStop offsetY ==> ’ + this.offsetY)
}
})
.scrollBar(BarState.Off)
.width(‘100%’)
.height(‘100%’)
}
}<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>