五笔打字通主页
将上篇文章修改一下,用于媒体查询之监控横屏与竖屏状态。代码如下:
import { mediaquery } from '@kit.ArkUI'; //导入媒体查询模块
@Entry
@Component
struct Page8 {
@State message: string = '';
@State backColor: Color = Color.White
//通过 matchMediasync 接口设置媒体查询条件
//横屏条件 -- 源码来自 wb98.com
private listener0: mediaquery.MediaQueryListener =
this.getUIContext().getMediaQuery().matchMediaSync('(orientation: landscape)')
//竖屏条件
private listener9: mediaquery.MediaQueryListener =
this.getUIContext().getMediaQuery().matchMediaSync('(orientation: portrait)')
aboutToAppear(): void {
//所有监听绑定事件
this.listener0.on('change', (result: mediaquery.MediaQueryResult) => {
if (result.matches) {
this.backColor = Color.Yellow
this.message = 'landscape 横屏'
}
})
this.listener9.on('change', (result: mediaquery.MediaQueryResult) => {
if (result.matches) {
this.backColor = Color.Green
this.message = 'portrait 竖屏'
}
})
}
aboutToDisappear(): void {
//解绑监听
this.listener0.off('change')
this.listener9.off('change')
}
build() {
Column() {
Text(this.message)
.fontSize(50)
.fontWeight(FontWeight.Medium)
}
.width('100%')
.height('100%')
.backgroundColor(this.backColor)
}
}来源:济亨网
本文链接:https://www.wb98.com/post/379.html