React Native android 按钮的波纹效果

发布时间：2020-12-15 03:24:08 所属栏目：百科来源：网络整理

导读：TouchableNativeFeedback A wrapper for making views respond properly to touches (Android only). On Android this component uses native state drawable to display touch feedback. At the moment it only supports having a single View instance as

TouchableNativeFeedback

A wrapper for making views respond properly to touches (Android only). On Android this component uses native state drawable to display touch feedback. At the moment it only supports having a single View instance as a child node,as it's implemented by replacing that View with another instance of RCTView node with some additional properties set.

Background drawable of native feedback touchable can be customized withbackgroundproperty.

Example:

    renderButton 
   : 
    function 
   ( 
   ) 
   { 
    return 
    ( <TouchableNativeFeedback onPress 
   = 
   { 
   this 
   ._onPressButton 
   } background 
   = 
   {TouchableNativeFeedback 
   . 
   SelectableBackground( 
   ) 
   } 
   > <View style 
   = 
   { 
   {width 
   : 
    150 
   , height 
   : 
    100 
   , backgroundColor 
   : 
    'red' 
   } 
   } 
   > <Text style 
   = 
   { 
   {margin 
   : 
    30 
   } 
   } 
   >Button< 
   /Text 
   > < 
   /View 
   > < 
   /TouchableNativeFeedback 
   > 
   ) 
   ; 
   } 
   , 
  

Props

TouchableWithoutFeedback props...

backgroundbackgroundPropType

Determines the type of background drawable that's going to be used to display feedback. It takes an object withtypeproperty and extra data depending on thetype. It's recommended to use one of the static methods to generate that dictionary.

Methods

staticSelectableBackground(0)

Creates an object that represents android theme's default background for selectable elements (?android:attr/selectableItemBackground).

staticSelectableBackgroundBorderless(0)

Creates an object that represent android theme's default background for borderless selectable elements (?android:attr/selectableItemBackgroundBorderless). Available on android API level 21+.

staticRipple(color,borderless)

Creates an object that represents ripple drawable with specified color (as a string). If propertyborderlessevaluates to true the ripple will render outside of the view bounds (see native actionbar buttons as an example of that behavior). This background type is available on Android API level 21+.

Parameters:

Name and Type	Description
color string	The ripple color
borderless boolean	If the ripple can render outside it's bounds

        <Button
                background={ (Platform.OS === 'android') ? TouchableNativeFeedback.Ripple('#f39c12',true) : null }
                style={ styles.buttonStyle }
                textStyle={ styles.textStyle }
                onPress={ () => {
                            console.log('world!')
                          } }>
          Hello
        </Button>

检测平台如果是Android平台，就设置波纹效果

background={ (Platform.OS === 'android') ? TouchableNativeFeedback.Ripple('#f39c12',true) : null }

（编辑：李大同）

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