refs assignment are getting undefined

Expo SDK
1

Hello,

EDIT:
After careful testing, it’s a silly mistake. I forgot to bind(this) on the onPress={}.

onPress={this.onButtonPress}
onPress={this.onButtonPress.bind(this)}

Would just like to ask how you solved this problem with refs getting undefined. It’s weird because in some Snack that I have the ref assignments are getting properly defined, but in this case it’s not working. I have also tried the createRef style and it’s still returning undefined. It’s weird cause in some Snack it’s working, sometimes it’s not.

<Animatable.View ref={this.handleViewRef} style={containerStyle}>

handleViewRef = ref => {
   //It's working!
   ref.flash();
   this.view = ref;
};

onButtonPress() {
   //undefined is not an object (evaluating 'this.view.flash')
   this.view.flash();
};

package.json

    "@expo/vector-icons": "^6.3.1",
    "expo": "^27.0.0",
    "react": "16.3.1",
    "react-native": "https://github.com/expo/react-native/archive/sdk-27.0.0.tar.gz",
    "react-native-animatable": "^1.3.0",
    "react-native-elements": "0.18.5",
    "react-native-router-flux": "^4.0.0-beta.31",
    "react-native-slider": "0.11.0",
    "react-redux": "^5.0.7",
    "redux": "^4.0.0",
    "redux-thunk": "^2.3.0"

Thanks so much.

1 Like
2

Glad you figured it out!

3

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