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申请权限

外部网址图片，配置module.json5

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1"requestPermissions": [
2  {
3    "name": "ohos.permission.INTERNET"
4  }
5],

3秒跳转

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1aboutToAppear(): void {
2  setTimeout(() => {
3    router.replaceUrl({
4      url: 'pages/Index'
5    })
6  }, 3000)
7}

倒计时

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 1import { BasicConstants } from '../constants/BasicConstants';
 2import { router } from '@kit.ArkUI'
 3
 4@Entry
 5@Component
 6struct Page02_GuidePage {
 7  @State message: string = 'Hello World';
 8  @State count: number = 3
 9  private timer: number = 0
10
11  aboutToAppear(): void {
12    this.timer = setInterval(() => {
13      this.count--
14      if (this.count == 0) {
15        router.replaceUrl({
16          url: 'pages/Index'
17        })
18      }
19    }, 1000)
20  }
21
22  aboutToDisappear(): void {
23    clearInterval(this.timer)
24  }
25
26  build() {
27    Stack({
28      alignContent: Alignment.TopEnd
29    }) {
30      Text(`倒计时：${this.count}`)
31        .margin({
32          right: 10
33        })
34      Flex({
35        direction: FlexDirection.Column,
36        alignItems: ItemAlign.Center
37      }) {
38        // logo
39        Column() {
40          Image($r('app.media.bird'))
41            .width(200)
42            .borderRadius(10)
43        }
44        .justifyContent(FlexAlign.Center)
45        .alignItems(HorizontalAlign.Center)
46        .flexGrow(1)
47
48        Image($r('app.media.startIcon'))
49          .width(28)
50          .objectFit(ImageFit.Contain)
51
52        Text('WoniuMall超市')
53          .fontColor('#66000000')
54          .fontSize(20)
55          .letterSpacing(16)
56          .margin({
57            top: 12,
58            bottom: 136
59          })
60      }
61      .width(BasicConstants.FULL_WIDTH)
62      .height(BasicConstants.FULL_HEIGHT)
63    }
64  }
65}

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