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文章内名词解释:
正向:父变子也变 逆向:子变父也变
@Entry @Component struct Demo04 { @State message: string = 'Hello World123' @State obj: Aa = { name: 'zhangsan' } build() { Row() { Column() { Text("基本数据类型") Son({ message: this.message }) Divider().strokeWidth(2) Text("对象数据类型") Son({ obj:this.obj }) Button('改变数据').onClick((event: ClickEvent) => { this.message = '666' }) } .width('100%') } .height('100%') } } @Component struct Son { message: string = '' obj:Aa = {name:''} build() { Row() { Text(this.message) Text(this.obj.name) } } } class Aa{ name: string = '' }
@Entry @Component struct Demo04 { @State message: string = 'Hello World123' @State obj: Aa = { name: 'zhangsan' } build() { Row() { Column() { Text(this.message) Button('改变数据').onClick((event: ClickEvent) => { this.message = '666' }) .margin({ bottom:20 }) Divider().strokeWidth(5) Text("基本数据类型") Son({ message: this.message }) Divider().strokeWidth(2) Text("对象数据类型") // Son({ obj:this.obj }) } .width('100%') } .height('100%') } } @Component struct Son { @Prop message:string // @Prop obj:Aa build() { Row() { Text(this.message) // Text(this.obj.name) Button("逆向改变").onClick(() => { this.message = "子变父不变" // this.obj.name = "子变父不变" }) } } } class Aa{ name: string = '' }
@Entry @Component struct Demo04 { @State message: string = 'Hello World123' @State obj: Aa = { name: 'zhangsan' } build() { Row() { Column() { Text(this.message) Text(this.obj.name) Button('改变数据').onClick((event: ClickEvent) => { this.message = '666' this.obj.name = "lisi123" }) .margin({ bottom:20 }) Divider().strokeWidth(5) Text("基本数据类型") Son({message:$message}) Divider().strokeWidth(2) Text("对象数据类型") // Son({obj:$obj}) } .width('100%') } .height('100%') } } @Component struct Son { @Link message:string // @Link obj:Aa build() { Row() { Text(this.message) // Text(this.obj.name) Button("逆向改变").onClick(() => { this.message = "子变父不变" // this.obj.name = "子变父不变" }) } } } class Aa{ name: string = '' }
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