TextInput

The <TextInput> component provides single-line text input.

NOTE

This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

Not supported

APIs

TextInput(value?:{placeholder?: ResourceStr, text?: ResourceStr, controller?: TextInputController})

Parameters

Attributes

Among the universal attributes and universal text attributes, fontColor, fontSize, fontStyle, fontWeight, and fontFamily are supported. In addition, the following attributes are supported.

NOTE

The default value of the universal attribute padding is as follows:
{
top: 8 vp,
right: 16 vp,
bottom: 8 vp,
left: 16 vp
}

Since API version 10, .width(‘auto’) can be set for the <TextInput> component. Under this setting, the component auto-adapts its width to the text width, while respecting the constraintSize configuration and the maximum and minimum width restrictions received by the parent container. For details, see Size.

EnterKeyType

InputType

TextInputStyle⁹⁺

PasswordIcon¹⁰⁺

Events

In addition to the universal events, the following events are supported.

TextInputController⁸⁺

Implements the controller of the <TextInput> component.

Objects to Import

controller: TextInputController = new TextInputController()

caretPosition⁸⁺

caretPosition(value: number): void

Sets the position of the caret.

Parameters

setTextSelection¹⁰⁺

setTextSelection(selectionStart: number, selectionEnd: number): void

Sets the text selection area, which will be highlighted.

Parameters

stopEditing¹⁰⁺

stopEditing(): void

Exits the editing state.

getTextContentRect¹⁰⁺

getTextContentRect(): RectResult

Obtains the position of the edited text area relative to the component and its size. The unit of the return value is pixel.

Return value

NOTE

• If no text is entered, the return value contains the position information, but the size is 0.
• The position information is the offset of the first character relative to the editable area.

RectResult¹⁰⁺

Describes the position and size.

getTextContentLineCount¹⁰⁺

getTextContentLineCount(): number

Obtains the number of lines of the edited text.

Return value

Example

Example 1

// xxx.ets
@Entry
@Component
struct TextInputExample {
  @State text: string = ''
  controller: TextInputController = new TextInputController()

  build() {
    Column() {
      TextInput({ text: this.text, placeholder: 'input your word...', controller: this.controller })
        .placeholderColor(Color.Grey)
        .placeholderFont({ size: 14, weight: 400 })
        .caretColor(Color.Blue)
        .width(400)
        .height(40)
        .margin(20)
        .fontSize(14)
        .fontColor(Color.Black)
        .inputFilter('[a-z]', (e) => {
          console.log(JSON.stringify(e))
        })
        .onChange((value: string) => {
          this.text = value
        })
      Text(this.text)
      Button('Set caretPosition 1')
        .margin(15)
        .onClick(() => {
          // Move the caret to after the first entered character.
          this.controller.caretPosition(1)
        })
      // Password text box.
      TextInput({ placeholder: 'input your password...' })
        .width(400)
        .height(40)
        .margin(20)
        .type(InputType.Password)
        .maxLength(9)
        .showPasswordIcon(true)
      // Inline-style text box.
      TextInput({ text: 'inline style' })
        .width(400)
        .height(50)
        .margin(20)
        .borderRadius(0)
        .style(TextInputStyle.Inline)
    }.width('100%')
  }
}

Example 2

@Entry
@Component
struct TextInputExample {
  @State PassWordSrc1: Resource = $r('app.media.onIcon')
  @State PassWordSrc2: Resource = $r('app.media.offIcon')
  @State TextError: string = ''
  @State Text: string = ''
  @State NameText: string = 'test'

  @Builder itemEnd() {
    Select([{ value: 'KB' },
      { value: 'MB' },
      { value: 'GB' },
      { value: 'TB', }])
      .height("48vp")
      .borderRadius(0)
      .selected(2)
      .align(Alignment.Center)
      .value('MB')
      .font({ size: 20, weight: 500 })
      .fontColor('#182431')
      .selectedOptionFont({ size: 20, weight: 400 })
      .optionFont({ size: 20, weight: 400 })
      .backgroundColor(Color.Transparent)
      .responseRegion({ height: "40vp", width: "80%", x: '10%', y: '6vp' })
      .onSelect((index: number) => {
        console.info('Select:' + index)
      })
  }

  build() {
    Column({ space: 20 }) {
      // Customize the password icon.
      TextInput({ placeholder: 'Custom password icon' })
        .type(InputType.Password)
        .width(380)
        .height(60)
        .passwordIcon({ onIconSrc: this.PassWordSrc1, offIconSrc: this.PassWordSrc2 })
      // Show an underline.
      TextInput({ placeholder: 'Underline style' })
        .showUnderline(true)
        .width(380)
        .height(60)
        .showError('Error')
        .showUnit(this.itemEnd.bind(this))

      Text (`User name: ${this.Text}`)
        .width('95%')
      TextInput({ placeholder: 'Enter user name', text: this.Text })
        .showUnderline(true)
        .width(380)
        .showError(this.TextError)
        .onChange((value: string) => {
          this.Text = value
        })
        .onSubmit(() => {// If the entered user name is incorrect, the text box will be cleared and the error message will be displayed.
          if (this.Text == this.NameText) {
            this.TextError = ''
          } else {
            this.TextError ='Incorrect user name.'
            this.Text = ''
          }
        })

    }.width('100%')
  }
}

Example 3

// xxx.ets
@Entry
@Component
struct TextInputExample {
  controller: TextInputController = new TextInputController()
  @State inputValue: string = ""

  // Create a custom keyboard component.
  @Builder CustomKeyboardBuilder() {
    Column() {
      Button('x').onClick(() => {
        // Disable the custom keyboard.
        this.controller.stopEditing()
      })
      Grid() {
        ForEach([1, 2, 3, 4, 5, 6, 7, 8, 9, '*', 0, '#'], (item:number|string) => {
          GridItem() {
            Button(item + "")
              .width(110).onClick(() => {
              this.inputValue += item
            })
          }
        })
      }.maxCount(3).columnsGap(10).rowsGap(10).padding(5)
    }.backgroundColor(Color.Gray)
  }

  build() {
    Column() {
      TextInput({ controller: this.controller, text: this.inputValue })
        // Bind the custom keyboard.
        .customKeyboard(this.CustomKeyboardBuilder()).margin(10).border({ width: 1 })
    }
  }
}

你可能感兴趣的鸿蒙文章

harmony 鸿蒙ArkTS-based Declarative Development Paradigm

harmony 鸿蒙@ohos.multimedia.avCastPicker (AVCastPicker)

harmony 鸿蒙Property Animation

harmony 鸿蒙Enums

harmony 鸿蒙Blank

harmony 鸿蒙Button

harmony 鸿蒙CalendarPicker

harmony 鸿蒙Checkbox

harmony 鸿蒙CheckboxGroup

harmony 鸿蒙DataPanel