11-鸿蒙4.0学习之页面之间的参数传递
方法一
params
// 传参页面
import router from '@ohos.router'
@Entry
@Component
struct LifeCycle1 {
@State message: string = 'Hello World'
@State isShow: boolean = false
build() {
Row() {
Column({
space: 20 }) {
Text(this.message)
.fontSize(50)
.fontWeight(FontWeight.Bold)
Button('跳转界面')
.onClick(() => {
router.pushUrl({
url: 'pages/LifeCycle2',
params:{
name:'小明',
age:20
}
})
})
Button('切换')
.onClick(() => {
this.isShow = !this.isShow
})
Divider()
if (this.isShow) {
LifeCycle1_son()
}
}
.width('100%')
}
.height('100%')
}
// 页面显示
onPageShow() {
console.log('page1……onPageShow')
}
// 页面隐藏
onPageHide() {
console.log('page1……onPageHide')
}
// 页面返回
onBackPress() {
console.log('page1……onBackPress')
}
aboutToAppear() {
console.log('组件本身……aboutToAppear')
}
// 组件析构销毁时触发：删除 移出
aboutToDisappear() {
console.log('组件本身……aboutToDisappear')
}
}
@Component
struct LifeCycle1_son {
build() {
Column() {
Text('子组件').fontSize(50)
}
}
// 组件渲染之前
aboutToAppear() {
console.log('LifeCycle1_son……aboutToAppear')
}
// 组件析构销毁时触发：删除 移出
aboutToDisappear() {
console.log('LifeCycle1_son……aboutToDisappear')
}
}
接受参数页面
import router from '@ohos.router'
let name = router.getParams()['name'] as string
@Entry
@Component
struct LifeCycle2 {
@State message: string = 'Hello World'
build() {
Row() {
Column() {
Text(name).fontSize(50)
Text(this.message)
.fontSize(50)
.fontWeight(FontWeight.Bold)
Button('返回第一个页面')
.onClick(() => {
router.back()
})
}
.width('100%')
}
.height('100%')
}
// 页面显示
onPageShow(){
console.log('page2……onPageShow')
}
// 页面隐藏
onPageHide(){
console.log('page2……onPageHide')
}
// 页面返回
onBackPress(){
console.log('page2……onBackPress')
}
}
// 应用程序之间数据共享
// AppStorage.Set(‘appName’,‘我是应用程序’)
AppStorage.SetOrCreate(‘appName’,‘我是应用程序所存储的数据’)
// 从应用对象身上取出数据
let appName:string = AppStorage.Get(‘appName’) as string
// 模拟器获取不到，真机可以显示出来
