React Native Touchable(按钮) onPress 事件系列总结

一、ToushableHighlight                       TouchableOpacity 透明按钮 点击 后 从透明 到不透明

点击后改变颜色 和 透明度 

背景的透明度可能 会 影响 文字 

import React, {Component} from 'react';
import {
    AppRegistry,
    StyleSheet,
    Text,
    View,
    TouchableOpacity,
    TouchableHighlight,
    TouchableNativeFeedback,
    TouchableWithoutFeedback,

} from 'react-native';

class TouchablesDemo extends Component {
    onPressCallback = () => {
            alert('点击了按钮');
    };
    onLongPress() {
        alert('长点击');
    };

    onPressIn () {
        alert('按下');
    }

    onPressOut () {
        alert('抬起')
    }
    render() {
        return (
            style={styles.container}>

                                    style={styles.touchables}
                    underlayColor = '#f00'
                    activeOpacity={0.7}
                    onPressIn = {this.onPressIn}
                    onPressOut={this.onPressOut}
                    onLongPress={this.onLongPress}

                    onPress={this.onPressCallback}
                >
                    style={styles.touchablesText}>TouchableHighlight
                

                                    style={styles.touchables}
                    onPress={this.onPressCallback}
                >
                    style={styles.touchablesText}>TouchableOpacity
                

                                    onPress={this.onPressCallback}
                    background={TouchableNativeFeedback.SelectableBackground()}
                >
                    style={styles.touchables}>
                        style={styles.touchablesText}>TouchableNativeFeedback
                    
                

                                    onPress={this.onPressCallback}
                    background={TouchableNativeFeedback.SelectableBackground()}
                >
                    style={styles.touchables}>
                        style={styles.touchablesText}>TouchableNativeFeedback
                    
                

            
        );
    }
}

const styles = StyleSheet.create({
    touchablesText: {
        color: 'white',
        fontSize: 20,
        textAlign: 'center',
    },
    touchables: {
        margin: 10,
        backgroundColor: 'blue',
        width: 250,
        height: 50,
        borderRadius: 20,
        justifyContent: 'center',
    },
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
        backgroundColor: '#F5FCFF',
    }
});

module.exports = TouchablesDemo;