harmony 鸿蒙Sheet Transition

2023-06-24
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Sheet Transition

You can bind a sheet to a component through the bindSheet attribute. You can also set the sheet to the preset or custom height for when the component is inserted.

NOTE

The APIs of this module are supported since API version 10. Updates will be marked with a superscript to indicate their earliest API version.

Switching between landscape and portrait modes is not supported.

Route hopping is not supported.

Attributes

Name	Parameter	Description
bindSheet	isShow: boolean, builder: CustomBuilder, options?: SheetOptions	Binds a sheet to the component, which can be displayed when the component is touched. isShow: whether to display the sheet. Since API version 10, this parameter supports two-way binding through $$. builder: content of the sheet. options: optional attributes of the sheet.

NOTE

When no two-way binding is set up for the isShow parameter, closing the sheet by dragging does not change the parameter value.

To synchronize the value of isShow with the actual state of the sheet, it is recommended that you use the $$ to set up two-way binding for isShow.

SheetOptions

Name	Type	Mandatory	Description
height	SheetSize \|Length	No	Height of the sheet. Default value: LARGE
dragBar	boolean	No	Whether to display the drag bar. By default, the drag bar is displayed .
backgroundColor	ResourceColor	No	Background color of the sheet.
maskColor	ResourceColor	No	Mask color of the sheet.
onAppear	() => void	No	Callback invoked when the sheet is displayed.
onDisappear	() => void	No	Callback invoked when the sheet is hidden.

SheetSize

Name	Description
MEDIUM	The sheet height is half of the screen height.
LARGE	The sheet height is almost the screen height.

Example

// xxx.ets
@Entry
@Component
struct SheetTransitionExample {
  @State isShow:boolean = false
  @State isShow2:boolean = false
  @State sheetHeight:number = 300;
  @State showDragBar:boolean = true;

  @Builder myBuilder() {
    Column() {
      Button("change height")
        .margin(10)
        .fontSize(20)
        .onClick(()=>{
          this.sheetHeight = 500;
        })

      Button("Set Illegal height")
        .margin(10)
        .fontSize(20)
        .onClick(()=>{
          this.sheetHeight = 300;
        })

      Button("close dragBar")
        .margin(10)
        .fontSize(20)
        .onClick(()=>{
          this.showDragBar = false;
        })

      Button("close modal 1")
        .margin(10)
        .fontSize(20)
        .onClick(()=>{
          this.isShow = false;
        })
    }
    .width('100%')
    .height('100%')
  }

  build() {
    Column() {
      Button("transition modal 1")
        .onClick(() => {
          this.isShow = true
        })
        .fontSize(20)
        .margin(10)
        .bindSheet($$this.isShow, this.myBuilder(), {height: this.sheetHeight, dragBar: this.showDragBar, backgroundColor: Color.Green, onAppear: () => {console.log("BindSheet onAppear.")}, onDisappear: () => {console.log("BindSheet onDisappear.")}})
    }
    .justifyContent(FlexAlign.Center)
    .width('100%')
    .height('100%')
  }
}

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