Sticky Component inside scrollview

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逝去的感伤
逝去的感伤 2021-01-30 11:03

I\'m trying to build a a sticky component like this app

http://www.screencapture.ru/file/E88F08Fc

Deals, Products, Events tabs/segmentControl are actually start

5条回答
  •  醉话见心
    2021-01-30 11:45

    Thank you for answering my first question. I found it how to do it now. So basically what I do is I cheat on F8App code where they fallback from F8Scrolling native module if it is not available to this:

    if (!NativeModules.F8Scrolling) {
      var distance = EMPTY_CELL_HEIGHT - this.state.stickyHeaderHeight;
      var translateY = 0; this.state.anim.interpolate({
        inputRange: [0, distance],
        outputRange: [distance, 0],
        extrapolateRight: 'clamp',
      });
      transform = [{translateY}];
    }
    

    which gives the idea of animating my sticky view so here is i ended up

    const stickySegmentControlX = this.state.scrollY.interpolate({
        inputRange: [0, STICKY_SCROLL_DISTANCE],
        outputRange: [INIT_STICKY_HEADER, HEADER_MIN_HEIGHT],
        extrapolate: 'clamp'
    })
    
    ...
    
        return(
        ....
         
           Go Stick
         
        ....
       );
    

    so basically what I've done is animating the top position of an {position: 'absolute'}'s view while as the value of output range is between bottom position to the height of my header (so it'll stop right below my header) and the input range is between 0 and the difference of the top position and the header height. Eventually, the animation will feel natural as you scroll the scrollview.

    There you go a sticky header custom view. Here is the result:

    If you feel my answer is confusing, its better you heading to janic duplessis Medium post:
    React Native ScrollView animated header

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