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滑动条组件,通常用于快速调节设置值,如音量调节、亮度调节等应用场景。该组件从API Version 7开始支持。无子组件
一、接口
Slider(options?: {value?: number, min?: number, max?: number, step?: number, style?: SliderStyle, direction?: Axis, reverse?: boolean})
从API version 9开始,该接口支持在ArkTS卡片中使用。
参数:
SliderStyle枚举说明
从API version 9开始,该接口支持在ArkTS卡片中使用。
二、属性
支持除触摸热区以外的通用属性设置。
三、事件
通用事件仅支持挂载卸载事件:OnAppear,OnDisAppear。
SliderChangeMode枚举说明
从API version 9开始,该接口支持在ArkTS卡片中使用。
四、示例
- // xxx.ets
- @Entry
- @Component
- struct SliderExample {
- @State outSetValueOne: number = 40
- @State inSetValueOne: number = 40
- @State outSetValueTwo: number = 40
- @State inSetValueTwo: number = 40
- @State vOutSetValueOne: number = 40
- @State vInSetValueOne: number = 40
- @State vOutSetValueTwo: number = 40
- @State vInSetValueTwo: number = 40
-
- build() {
- Column({ space: 8 }) {
- Text('outset slider').fontSize(9).fontColor(0xCCCCCC).width('90%').margin(15)
- Row() {
- Slider({
- value: this.outSetValueOne,
- min: 0,
- max: 100,
- style: SliderStyle.OutSet
- })
- .showTips(true)
- .onChange((value: number, mode: SliderChangeMode) => {
- this.outSetValueOne = value
- console.info('value:' + value + 'mode:' + mode.toString())
- })
- // toFixed(0)将滑动条返回值处理为整数精度
- Text(this.outSetValueOne.toFixed(0)).fontSize(12)
- }
- .width('80%')
- Row() {
- Slider({
- value: this.outSetValueTwo,
- step: 10,
- style: SliderStyle.OutSet
- })
- .showSteps(true)
- .onChange((value: number, mode: SliderChangeMode) => {
- this.outSetValueTwo = value
- console.info('value:' + value + 'mode:' + mode.toString())
- })
- Text(this.outSetValueTwo.toFixed(0)).fontSize(12)
- }
- .width('80%')
-
- Text('inset slider').fontSize(9).fontColor(0xCCCCCC).width('90%').margin(15)
- Row() {
- Slider({
- value: this.inSetValueOne,
- min: 0,
- max: 100,
- style: SliderStyle.InSet
- })
- .blockColor('#191970')
- .trackColor('#ADD8E6')
- .selectedColor('#4169E1')
- .showTips(true)
- .onChange((value: number, mode: SliderChangeMode) => {
- this.inSetValueOne = value
- console.info('value:' + value + 'mode:' + mode.toString())
- })
- Text(this.inSetValueOne.toFixed(0)).fontSize(12)
- }
- .width('80%')
- Row() {
- Slider({
- value: this.inSetValueTwo,
- step: 10,
- style: SliderStyle.InSet
- })
- .blockColor('#191970')
- .trackColor('#ADD8E6')
- .selectedColor('#4169E1')
- .showSteps(true)
- .onChange((value: number, mode: SliderChangeMode) => {
- this.inSetValueTwo = value
- console.info('value:' + value + 'mode:' + mode.toString())
- })
- Text(this.inSetValueTwo.toFixed(0)).fontSize(12)
- }
- .width('80%')
-
- Row() {
- Column() {
- Text('vertical outset slider').fontSize(9).fontColor(0xCCCCCC).width('50%').margin(15)
- Row() {
- Slider({
- value: this.vOutSetValueOne,
- style: SliderStyle.OutSet,
- direction: Axis.Vertical
- })
- .blockColor('#191970')
- .trackColor('#ADD8E6')
- .selectedColor('#4169E1')
- .showTips(true)
- .onChange((value: number, mode: SliderChangeMode) => {
- this.vOutSetValueOne = value
- console.info('value:' + value + 'mode:' + mode.toString())
- })
- Slider({
- value: this.vOutSetValueTwo,
- step: 10,
- style: SliderStyle.OutSet,
- direction: Axis.Vertical
- })
- .blockColor('#191970')
- .trackColor('#ADD8E6')
- .selectedColor('#4169E1')
- .showSteps(true)
- .onChange((value: number, mode: SliderChangeMode) => {
- this.vOutSetValueTwo = value
- console.info('value:' + value + 'mode:' + mode.toString())
- })
- }
- }.width('50%').height(300)
-
- Column() {
- Text('vertical inset slider').fontSize(9).fontColor(0xCCCCCC).width('50%').margin(15)
- Row() {
- Slider({
- value: this.vInSetValueOne,
- style: SliderStyle.InSet,
- direction: Axis.Vertical,
- reverse: true // 竖向的Slider默认是上端是min值,下端是max值,因此想要从下往上滑动,需要设置reverse为true
- })
- .showTips(true)
- .onChange((value: number, mode: SliderChangeMode) => {
- this.vInSetValueOne = value
- console.info('value:' + value + 'mode:' + mode.toString())
- })
- Slider({
- value: this.vInSetValueTwo,
- step: 10,
- style: SliderStyle.InSet,
- direction: Axis.Vertical,
- reverse: true
- })
- .showSteps(true)
- .onChange((value: number, mode: SliderChangeMode) => {
- this.vInSetValueTwo = value
- console.info('value:' + value + 'mode:' + mode.toString())
- })
- }
- }.width('50%').height(300)
- }
- }.width('100%')
- }
- }
-
五、效果样式
六、场景
适合卡片上直接操作提示滑动条组件,通常用于快速调节设置值,如音量调节、亮度调节等应用场景提供。
本文根据HarmonyOS官方文档整理
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