harmony 鸿蒙Time Picker Dialog Box

2022-08-09
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Time Picker Dialog Box

A time picker dialog box is a dialog box that allows users to select a time from the 24-hour range through scrolling.

NOTE

The APIs of this module are supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.

The functionality of this module depends on UI context. This means that the APIs of this module cannot be used where the UI context is unclear. For details, see UIContext.

Since API version 10, you can use the showTimePickerDialog API in UIContext to obtain the UI context.

TimePickerDialog.show

show(options?: TimePickerDialogOptions)

Shows a time picker dialog box.

TimePickerDialogOptions

Name	Type	Mandatory	Description
selected	Date	No	Selected time. Default value: current system time
useMilitaryTime	boolean	No	Whether to display time in 24-hour format. The 12-hour format is used by default. Default value: false NOTE When in the 12-hour format, the AM/PM zone does not change depending on the hour portion.
disappearTextStyle¹⁰⁺	PickerTextStyle	No	Font color, font size, and font width for the top and bottom items. Default value: { color: ‘#ff182431’, font: { size: ‘14fp’, weight: FontWeight.Regular } }
textStyle¹⁰⁺	PickerTextStyle	No	Font color, font size, and font width of all items except the top, bottom, and selected items. Default value: { color: ‘#ff182431’, font: { size: ‘16fp’, weight: FontWeight.Regular } }
selectedTextStyle¹⁰⁺	PickerTextStyle	No	Font color, font size, and font width of the selected item. Default value: { color: ‘#ff007dff’, font: { size: ‘20vp’, weight: FontWeight.Medium } }
alignment¹⁰⁺	DialogAlignment	No	Alignment mode of the dialog box in the vertical direction. Default value: DialogAlignment.Default
offset¹⁰⁺	Offset	No	Offset of the dialog box based on the alignment settings. Default value: { dx: 0 , dy: 0 }
maskRect¹⁰⁺	Rectangle	No	Mask area of the dialog box. Events outside the mask area are transparently transmitted, and events within the mask area are not. Default value: { x: 0, y: 0, width: ‘100%’, height: ‘100%’ }
onAccept	(value: TimePickerResult) => void	No	Callback invoked when the OK button in the dialog box is clicked.
onCancel	() => void	No	Callback invoked when the Cancel button in the dialog box is clicked.
onChange	(value: TimePickerResult) => void	No	Callback invoked when the selected time changes.

Example

// xxx.ets
@Entry
@Component
struct TimePickerDialogExample {
  private selectTime: Date = new Date('2020-12-25T08:30:00')

  build() {
    Column() {
      Button ("TimePickerDialog 12-hour format")
        .margin(20)
        .onClick(() => {
          TimePickerDialog.show({
            selected: this.selectTime,
            disappearTextStyle: { color: Color.Red, font: { size: 15, weight: FontWeight.Lighter } },
            textStyle: { color: Color.Black, font: { size: 20, weight: FontWeight.Normal } },
            selectedTextStyle: { color: Color.Blue, font: { size: 30, weight: FontWeight.Bolder } },
            onAccept: (value: TimePickerResult) => {
              // Set selectTime to the time when the OK button is clicked. In this way, when the dialog box is displayed again, the selected time is the time when the operation was confirmed last time.
              if (value.hour != undefined && value.minute != undefined) {
                this.selectTime.setHours(value.hour, value.minute)
                console.info("TimePickerDialog:onAccept()" + JSON.stringify(value))
              }
            },
            onCancel: () => {
              console.info("TimePickerDialog:onCancel()")
            },
            onChange: (value: TimePickerResult) => {
              console.info("TimePickerDialog:onChange()" + JSON.stringify(value))
            }
          })
        })
      Button ("TimePickerDialog 24-hour format")
        .margin(20)
        .onClick(() => {
          TimePickerDialog.show({
            selected: this.selectTime,
            useMilitaryTime: true,
            disappearTextStyle: { color: Color.Red, font: { size: 15, weight: FontWeight.Lighter } },
            textStyle: { color: Color.Black, font: { size: 20, weight: FontWeight.Normal } },
            selectedTextStyle: { color: Color.Blue, font: { size: 30, weight: FontWeight.Bolder } },
            onAccept: (value: TimePickerResult) => {
              if (value.hour != undefined && value.minute != undefined) {
                this.selectTime.setHours(value.hour, value.minute)
                console.info("TimePickerDialog:onAccept()" + JSON.stringify(value))
              }
            },
            onCancel: () => {
              console.info("TimePickerDialog:onCancel()")
            },
            onChange: (value: TimePickerResult) => {
              console.info("TimePickerDialog:onChange()" + JSON.stringify(value))
            }
          })
        })
    }.width('100%')
  }
}

TimetPickerDialog