九、TouchableOpacity的onPress方法失效

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react native要作为Fragment页，嵌入到Activity中，需要用到ReactRootView类。具体操作就不做解释了。今天要记录的是TouchableOpacity的onPress方法
点击失效。花了一上午事件才找到原因。嵌入fragment的父activity必须得要在onResume， onPause, onDestroy中添加rn的host函数。代码如下：

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kotlin写法：

class MeActivity : AppCompatActivity(), DefaultHardwareBackBtnHandler {

	/*省略*/
	override fun invokeDefaultOnBackPressed() {
        super.onBackPressed();
    }
	
    override fun onResume() {
        super.onResume()
        (application as ReactApplication).reactNativeHost.reactInstanceManager.onHostResume(this, this);
    }

    override fun onPause() {
        super.onPause()
        (application as ReactApplication).reactNativeHost.reactInstanceManager.onHostPause(this);
    }

    override fun onDestroy() {
        super.onDestroy()
        (application as ReactApplication).reactNativeHost.reactInstanceManager.onHostDestroy(this);
    }

}
必须添加上述几个方法，不然onPress, console.warn等交互语句都失效