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