在视图上限制手势 [英] limiting gesture on view

问题描述

这是我在视图上添加手势的方式

This is how I add gesture on view

- (void)_addPanGestureToView:(UIView *)view {
    UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(_handlePan:)];
    panGesture.delegate = self;
    panGesture.maximumNumberOfTouches = 1;
    panGesture.minimumNumberOfTouches = 1;
    [view addGestureRecognizer:panGesture]; 
}

一切都很完美，但手势在整体上我怎么办？像手势这样的东西仅在视图的一半内响应？

Everything is working perfectly, but gesture is on the whole view how could I do something like gesture respond only in half of view?

推荐答案

为什么不使用 CGRectContainsPoint（）并检查视图中的触摸位置是否在您希望的范围内。如果不是，请忽略它：

Why not just use CGRectContainsPoint() and check if the touches location within your view is within the area you want it to be. If it isn't, ignore it:

- (void)panGestureDetected:(UIPanGestureRecognizer *)sender
{
    CGPoint location = [sender locationInView:sender.view];
    CGRect someRect = ...

    if (CGRectContainsPoint(someRect, location)) {
            // point is in specified area
    }
}

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