iOS-实现超出父视图点击响应

关于这个问题，其实网上有很多技术博客给出了很好的方案，但是仍然有个别博客将有严重错误的结论挂在网上（例如），本文就该问题进行了严格的论证，希望能够帮到有需要的人。

错误结论：每次递归去调用hitTest:(CGPoint)point withEvent:(UIEvent *)event之前，都会调用pointInside:withEvent:来确定该触摸点是否在该View内。
正确结论：先调用hitTest:(CGPoint)point withEvent:(UIEvent *)event，而后调用pointInside:withEvent:。

那么点击超出父视图但在子视图的区域时，要想响应事件到底怎么处理最合理？
正确答案：

重写父视图方法- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {    UIView *view = [super hitTest:point withEvent:event];    if (self.userInteractionEnabled == NO && self.alpha <= 0.01 && self.hidden == YES) {        return nil;    }    if (view == nil) {        for (UIView * subview in self.subviews.reverseObjectEnumerator) {            CGPoint converP = [subview convertPoint:point fromView:self];            UIView *suitableView = [subview hitTest:converP withEvent:event];            if (suitableView) {                return suitableView;            } else {                return view;            }        }    }    return view;}

相关知识：Hit-test view的应用
扩大UIButton的点击区域

- (BOOL)pointInside:(CGPoint)point withEvent:(nullable UIEvent *)event {    return CGRectContainsPoint(HitTestingBounds(self.bounds, self.minimumHitTestWidth, self.minimumHitTestHeight), point);}CGRect HitTestingBounds(CGRect bounds, CGFloat minimumHitTestWidth, CGFloat minimumHitTestHeight) {    CGRect hitTestingBounds = bounds;    if (minimumHitTestWidth > bounds.size.width) {        hitTestingBounds.size.width = minimumHitTestWidth;        hitTestingBounds.origin.x -= (hitTestingBounds.size.width - bounds.size.width)/2;    }    if (minimumHitTestHeight > bounds.size.height) {        hitTestingBounds.size.height = minimumHitTestHeight;        hitTestingBounds.origin.y -= (hitTestingBounds.size.height - bounds.size.height)/2;    }    return hitTestingBounds;}