How to call Two functions in a event on React-Native?

问题

I would try : Source ( Two function in a event on React-Native )

onValueChange={(selected) => { this.setState({selected}); this.state.eventOnChange(); }}

But that's Not work

That executes the first function , but not the second.

回答1:

Component.setState() is asynchronous and may be locked on the second call while it is still doing the first.

Do the second call in a callback like this:

this.setState({selected},() => {
    this.state.eventOnChange();
});

回答2:

Try to log a console after all functions

onValueChange={(selected) => { 
    this.setState({selected});
    this.state.eventOnChange();
    console.log('it works!');
}}

if its printing then there should be something wrong with second function call.

来源：https://stackoverflow.com/questions/42920241/how-to-call-two-functions-in-a-event-on-react-native