ios - setExclusiveTouch ignored when using UISwipeGestureRecognizer -

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i have 2 uiviews (custom scroll views) respond uiswipegesturerecognizer. these 2 uiviews subviews of parent uiview. want allow one of subviews respond recognizer.
in other words, 1 should allowed swiped @ time.

setting setexclusivetouch = yes on subviews and/or parent view doesn't have effect.

how can make sure 1 subview being swiped @ time?

here's picture:

enter image description here

uiscrollview's default have multipletouchenabled set yes - if not need multiple touch (zooming example requires it), set no.


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