Slider

The NativeScript Slider component lets the user to drag a control to select a value. You can set the specific range to use by setting the component’s minValue and maxValue.

Usage

XML
JavaScript
TypeScript

<Slider value="10" minValue="0" maxValue="100" loaded="onSliderLoaded" />

function onSliderLoaded(argsloaded) {
    const sliderComponent = argsloaded.object;
    sliderComponent.on("valueChange", (args) => {
        const slider = args.object;
        console.log(`Slider new value ${slider.value}`);
    });
}

exports.onSliderLoaded = onSliderLoaded;

import { Slider } from "tns-core-modules/ui/slider";

export function onSliderLoaded(argsloaded) {
    let sliderComponent: Slider = <Slider> argsloaded.object;
    sliderComponent.on("valueChange", function(args) {
        let slider = <Slider>args.object;
        console.log(`Slider new value ${slider.value}`);
    });
}

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Demo Source

Styling

<Slider value="10" minValue="0" maxValue="100"
        backgroundColor="green" color="red" />

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Demo Source

Creating Slider component via Code-Behind

XML
JavaScript
TypeScript

<StackLayout id="stackLayoutId">
        <Label text="{{ 'Result: ' + slResult}}" textWrap="true" />

</StackLayout>

function onPageLoaded(args) {
    const page = args.object;
    const vm = new observableModule.Observable();
    const stackLayout = page.getViewById("stackLayoutId");

    vm.set("slResult", 22);
    // creating new Switch and binding the value property
    const options = {
        sourceProperty: "age",
        targetProperty: "value"
    };
    const sliderComponent = new sliderModule.Slider();
    sliderComponent.bind(options, vm);
    // setting slider.value to 22
    vm.set("age", 22);

    sliderComponent.on("valueChange", (args) => {
        vm.set("slResult", args.object.value);
    });

    stackLayout.addChild(sliderComponent);

    page.bindingContext = vm;
}

exports.onPageLoaded = onPageLoaded;

export function onPageLoaded(args) {
    const page: Page = <Page> args.object;
    const vm = new Observable();
    const stackLayout: StackLayout = <StackLayout> page.getViewById("stackLayoutId");

    vm.set("slResult", 22);
    // creating new Switch and binding the value property
    const options = {
        sourceProperty: "age",
        targetProperty: "value"
    };
    const sliderComponent = new Slider();
    sliderComponent.bind(options, vm);
    // setting slider.value to 22
    vm.set("age", 22);

    sliderComponent.on("valueChange", (slargs) => {
        vm.set("slResult", (<Slider>slargs.object).value);
    });

    stackLayout.addChild(sliderComponent);

    page.bindingContext = vm;
}

Properties

Name	Type	Description
`selectedIndex`	`number`	Gets or sets the selected index of the SegmentedBar component.
`items`	`Array<SegmentedBarItem>`	Gets or sets the items of the SegmentedBar.
`selectedBackgroundColor`	`Color`	Gets or sets the selected background color of the SegmentedBar component.

Events

Name	Description
`selectedIndexChanged`	Emitted when the selected index is changed (via interaction or programmatically).

API References

Name	Type
tns-core-modules/ui/slider	`Module`
Slider	`Class`

Native Component

Android	iOS
android.widget.SeekBar	UISlider

NativeScript Core