解决UIPanGestureRecognizer 与 UISwipeGestureRecognizer 在 UIPageViewController 的各种问题

原创于 2021-10-27 14:10:12 发布 · 434 阅读

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本文介绍了如何在UIGestureRecognizerDelegate中实现多手势同时识别，特别是针对向下滑动的手势进行详细解析。通过设置代理方法允许手势同时识别，当滑动手势速度超过一定阈值并在特定区域内触发时，执行相应操作。同时，通过即时取消消息手势来优化交互体验。

在 UIGestureRecognizerDelegate 代理中支持同时多手势即可

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    if(gestureRecognizer == self.xxxGesture){
        return YES;
    }
    return NO;
}

比如向下滑动实现

- (void)handlePanDown:(UIPanGestureRecognizer *)panGesture {
    CGPoint velocity = [panGesture velocityInView:self.view];

    if (velocity.y > 300) { //判断速度
        
        //判断响应区域
        CGPoint swipPoint = [panGesture locationInView:self.view];
        CGRect swipReactRect = CGRectMake(CGRectGetMinX(self.view.frame), CGRectGetMinY(self.view.frame), CGRectGetWidth(self.view.frame), CGRectGetHeight(self.view.frame) * 0.3);
        BOOL canSwipBehavior = CGRectContainsPoint(swipReactRect, swipPoint);

        if (canSwipBehavior && panGesture.state != UIGestureRecognizerStateCancelled) {
            [self doSomething];
            //即时取消息手势
            panGesture.state = UIGestureRecognizerStateCancelled;

        }
    }
}