javascript - The onPress function in react-native cannot directly write functions with parameters

Question

 <Icon.Button onPress={() => {this._change('male')}} name="ios-male">男</Icon.Button>

Writing like this will report an error. You need to write it in the following way and put it in return

  <Icon.Button onPress={() => {() => {this._change('male')} }} name="ios-male">男</Icon.Button>

Does anyone know why?

Answer 1

This is not a function with parameters. You are directly executing a function with parameters.
Didn’t you realize that _change is executed without waiting for the click to start?

The second way to write it is to wrap this method with a function, and execute this function when clicked.

Let’s take a look at the relevant basics.