1 简单部分代码

export default class App extends Component<Props> {render() {return (<View style={styles.container}><View style={styles.welcome}><Button onPress={this.showMsg}title='prees me showMsg'/> <Button onPress={() => {this.showMessage()}}title='prees me showMessage'/> </View></View>);}//记得这里调用的时候不需要加上()showMsg(){alert("showMsg(){}");  }//记得末尾加上分号,调用的时候也要加上()showMessage = () => {alert("showMessage = () => {}");};
}const styles = StyleSheet.create({container: {flex: 1,justifyContent: 'center',alignItems: 'center',backgroundColor: '#F5FCFF',},welcome: {fontSize: 10,textAlign: 'center',margin: 30,},
});

 

 

 

 

 

2 分别点击上面代码的2个按钮效果如下