为什么我更改导航器道具执行两次处理程序？

Question

这是我切换页面的视图

this.props.navigator.push({
  component: QuestionDetail,
  passProps: {
    id: id,
    enteredDetail: function() {
      console.log(this)
    }
  }
});

// in QuestionDetail
render: function() {
  this.props.enteredDetail();
....

在 Xcode 我看到了这个

RCTJSLog> {"navigator":{},"route":{"passProps":{"id":"1010000002652090"}},"id":"1010000002652090"}
RCTJSLog> {"navigator":{},"route":{"passProps":{"id":"1010000002652090"}},"id":"1010000002652090"}

它出现了两次！为什么？

Answer 1

看到这个问题：

https://github.com/facebook/react-native/issues/151

in order for the react diffing algorithm to correctly reset properties back to their default state, we create a single dummy "defaultView" for every type of view

为什么我更改导航器道具执行两次处理程序？

why I change the navigator props execute twice handler?

react-native