Alert.alert 在 react-native 中自动触发两次

Question

Alert triggerd automatically twice. but if i comment Alert and only write console.warn() then it not triggered twice. but Alert triggered twice.

componentDidMount(){
          this._notificationSubscription = Expo.Notifications.addListener(
                this._handleNotification
              );
        }
          
        _handleNotification(notification){
            if (notification.data) {
            console.warn('inside if block')
            Alert.alert(
              "push notification",
              [
                { text: "Cancel" },
                {
                  text: "Ok",
                  onPress: () => this.props.navigation.navigate("More"),
                },
              ],
              { cancelable: false }
            ); 
          }
    }

expo sdk :- 39

Answer 1

Call this way

_handleNotification = (notification) => {
    ....
 }