ReactNative——笔记

1、全局错误异常捕获

ErrorUtils.setGlobalHandler() 

在生命周期里执行这个，相当于一个监听事件，当出现爆红等问题是，会直接进入里面的函数里，做任何你的操作。

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2、监听安卓物理返回键

componentWillMount() {if(Platform.OS ==='android') { BackHandler.addEventListener('hardwareBackPress',this.onBackHandler); }}

componentWillUnmount() {if(Platform.OS ==='android') {BackHandler.removeEventListener('hardwareBackPress',this.onBackHandler); } }

onBackHandler =()=>{// this.onMainScreen and this.goBack are just examples, you need to use your own implementation here// Typically you would use the navigator here to go to the last state.if(!this.onMainScreen()) {this.goBack();returntrue; }returnfalse; };

安卓物理返回键

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