如何禁用可触摸组件中子元素的触摸

Question

I have following code

<BlurView blurType={'light'} blurAmount={10} style={{flex: 1}}>
    <TouchableOpacity style={{flex: 1, justifyContent: 'center', alignItems: 'center'}} onPress={() => this.setState({displayVideoModal: false})}>
        <View style={{width: moderateScale(300), height: moderateScale(300), backgroundColor: '#333333', borderRadius: moderateScale(24)}}>

        </View>
    </TouchableOpacity>
</BlurView>

Which result in following

I have TouchableOpacity covering the BlurView area because I want the full blur view screen to respond to touch event and hide it. except the view in the center. It will contain the video and must not receive the touch event of its parent component and it must have touch event of its own.

How do I do this? Or I am willing to know if there are alternatives to achieve the similar result.

Answer 1

Nested Touchable seems to work in my case.

<BlurView blurType={'light'} blurAmount={10} style={{flex: 1}}>
    <TouchableOpacity style={{flex: 1, justifyContent: 'center', alignItems: 'center'}} onPress={() => this.setState({displayVideoModal: false})}>
        <TouchableHighlight style={{width: moderateScale(300), height: moderateScale(300), backgroundColor: '#333333', borderRadius: moderateScale(24)}}>
            <View></View>
        </TouchableHighlight>
    </TouchableOpacity>
</BlurView>

When I click on child TouchableHighlight it seems to receive the child touch event and ignore parent. This seems to work for now, not sure if it is the good option, will be open to hear for better options.

I also found this

How can I propagate touch event in nested Touchable in React Native?

https://facebook.github.io/react-native/docs/gesture-responder-system

React Native onStartShouldSetResponder and onResponderRelease?

Answer 2

You can leverage pointerEvents :

<BlurView blurType={'light'} blurAmount={10} style={{flex: 1}}>
    <TouchableOpacity style={{flex: 1, justifyContent: 'center', alignItems: 'center'}} onPress={() => this.setState({displayVideoModal: false})}>
        <View pointerEvents="none" style={{width: moderateScale(300), height: moderateScale(300), backgroundColor: '#333333', borderRadius: moderateScale(24)}}>
        </View>
    </TouchableOpacity>
</BlurView>

Answer 3

Nested touchables were not working for me because I also had buttons in the floating view. On the background overlay view (BlurView in this case), add the following props:

onStartShouldSetResponder={(event) => {
    return event.nativeEvent.touches.length == 1;
}}
onResponderRelease={(event) => {
    if (event.target == event.currentTarget) {
        this.props.onCancel()
    }
}}

This works because event.currentTarget is the view that has the prop onResponderRelease and target is the view that the touch was released upon.

React Native Gesture Responder System documentation: https://facebook.github.io/react-native/docs/gesture-responder-system