react-native的技巧

按钮定制

給图片添加点击事件

<TouchableOpacity onPress={this.lookAlbum} style={{flex: 0,
        height: 40,
        width: 40,
        borderRadius: 5,
        alignSelf: 'center',}}>
         <Image
             style={styles.imgPreview}
             source={{uri: this.state.currentUri || 'https://yyb.gtimg.com/aiplat/page/product/visionimgidy/img/demo6-16a47e5d31.jpg?', isStatic: true}}
          />
 </TouchableOpacity>

文字自定义按钮：

 <TouchableOpacity onPress={this.swtichCamera} style={{}}>
       <Text style={{ fontSize: 14 }}> 切换 </Text>
 </TouchableOpacity>