Slider button inspired by the slide to unlock widget with an optional animation manipulating the text's transparency. Of course, both the animation duration and text can be customized too.

A (hopefully simple enough) demo project is available too.

Run npm install --save react-native-slider-button

var SliderButton = require("react-native-slider-button");

<SliderButton
	text={"Slide to start!"}
	textAnimated={true}
	minimumValue={0} maximumValue={100} value={0}
	minimumTrackTintColor={"rgba(0,0,0,0)"}
	maximumTrackTintColor={"rgba(0,0,0,0)"}
	onTrigger={this.onBurnOffStart}/>

I strongly recommend creating a separate file holding the style definitions overwriting the following three definitons:

text describes the appearance of the text centered in the slider and supports all options of React Native's <Text> component. For instance, you can change the text colour and the font size, as shown below:

text:
{
	fontSize: 18,
	color: "#FFFFFF"
}

slider is responsible for customizing the slider. In the following example I am modifying the margin on the left and right side. Be cautios, that it is adviced to set flex to 1 too or to specify a custom width.

slider:
{
	flex: 1,
	marginLeft: 26,
	marginRight: 26
}

The slider's border can be adapted using by creating a custom object named sliderBorder, as shown below.

sliderBorder:
{
	borderWidth: 2,
	borderRadius: 20,
	borderColor: "#FFFFFF"
}

Please note that both slider as well as sliderBorder support all attributes of React Native's slider component. A complete example can be found in examples/SliderButtonStyle.js.

The custom style object can be applied to the component using the stylesheet property (see section Properties).

text (string) – The text to be displayed within the slider.

textAnimated (boolean) – Should the text change it's opacity from 1 to 0.5 and vice versa. The animation is endlessly repeated.

sliderCompletionValue (number) – Value the thumb needs to be moved beyond in order to trigger the event associated with the slider. For instance, if your minimum value is 0, your maximum value is 100 and this value is set to 89 the user has to move the thumb beyond 89 per cent of the slider's length.

onTrigger (function) – Callback invoked when the user moves the thumb beyond the completion value. No further parameters are passed to the callback method.

stylesheet (object) – Custom style for the slider button, as described in the custom style section.

resetAfterAction (boolean) – If this value is set to false the slider will remain in its position after the action is triggered. Otherwise, the slider will "jump" back to its initial value.

rightToLeft (boolean) (default: false) - This value allows to control the direction the user has to slide. In case it is set to true the user has to slide from 100 (right) to (100 - the value of sliderCompletionValue).

minimumValue (number) – The minimum allowed value (see React Native's documentation).

maximumValue (number) – The maximum allowed value (see React Native's documentation).

value (number) – The initial value (see React Native's documentation).

minimumTrackTintColor (string) – The track colour left to the thumb (see React Native's documentation).

maximumTrackTintColor (string) – The track colour right to the thumb (see React Native's documentation).

This project is MIT licensed. If there is a specific demand I am willing to change the license.