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paacha2017-09-12 16:44:34
Android
paacha, 2017-09-12 16:44:34

Why doesn't the onStartShouldSetPanResponder event fire?

Hello! Faced the following problem in my react-native application:

this._panResponder = PanResponder.create({
        // Ask to be the responder:
        onStartShouldSetPanResponder: () => {
          console.log('onStartShouldSetPanResponder');
          if (this.state.draggingComponent) {
            this._handleDrop();
          }
          return true
        },
        onMoveShouldSetPanResponder: (evt, gestureState) => {
          console.log('onMoveShouldSetPanResponder');
          return true;
        },
        onPanResponderGrant: () => {
          console.log('onPanResponderGrant');
          // return true;
        },
        onPanResponderMove: (...args) => {
          console.log('onPanResponderMove');
          return Animated.event([null, {
            dx: this.state.location.x, // x,y are Animated.Value
            dy: this.state.location.y,
          }]).apply(this, args);
        },
        onPanResponderRelease: (evt, gestureState) => {
          console.log('onPanResponderRelease')
          if (!this.state.draggingComponent) return false;
          //Ensures we exit all of the active drop zones
          this._handleDrop();
        },
        onResponderReject: () => {
          console.log('reject');
        }
      });

The event onStartShouldSetPanResponderfires only if it's outside the child element. If you click on it, then this event will not work, but all the others seem onPanResponderMoveto onPanResponderReleasework great. What can be wrong?

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