鸿蒙Next 支持数据双向绑定的组件:Checkbox--Search--TextInput

Checkbox

$$语法，$$绑定的变量发生变化时，会触发UI的刷新

@Entry
@Component
struct MvvmCase {
@State
isMarry:boolean = false@StatesearchText:string = ''build() {Grid(){GridItem(){Column(){Text("checkbox 的双向绑定")Checkbox().select($$this.isMarry)Text(this.isMarry+"")Button('改变').onClick(()=>{this.isMarry=!this.isMarry})}}.height(200).backgroundColor(Color.Yellow)}.width('100%').height('100%').columnsTemplate("1fr 1fr").columnsGap(20).rowsGap(20)}
}

Search

@Entry
@Component
struct MvvmCase {
@State
isMarry:boolean = false@StatesearchText:string = ''build() {Grid(){GridItem(){Column(){Text("search 的双向绑定")Search({value:$$this.searchText})Text(this.searchText+"")Button('改变').onClick(()=>{this.searchText='老宋你好'})}}.height(200).backgroundColor(Color.Pink)}.width('100%').height('100%').columnsTemplate("1fr 1fr").columnsGap(20).rowsGap(20)}
}

​​​​​​​ 

TextInput

@Entry
@Component
struct MvvmCase {
@State
isMarry:boolean = false@StatesearchText:string = ''controller: TextInputController = new TextInputController()build() {Grid(){GridItem(){Column(){Text("TextInput 的双向绑定")TextInput({ text: $$this.searchText, placeholder: 'TextInput 的双向绑定', controller: this.controller })Text(this.searchText+"")Button('改变').onClick(()=>{this.searchText='老宋你好01'})}}.height(200).backgroundColor(Color.Pink)}.width('100%').height('100%').columnsTemplate("1fr 1fr").columnsGap(20).rowsGap(20)}
}

还有很多组件都支持双向绑定