子控件超过父控件点击范围

• 封装控件层次太多，或子控件超过父控件区域，很容易出现点击没反应！

通用方案

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    UIView *view = [super hitTest:point withEvent:event];
    if (view == nil) {
        for (UIView *subView in self.subviews) {
            CGPoint p = [subView convertPoint:point fromView:self];
            if (CGRectContainsPoint(subView.bounds, p)) {
                view = subView;
            }
        }
    }
    return view;
}

具体方案

/// 超出父控件点击范围
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event { 
    CGPoint cartPoint = [self convertPoint:point toView:self.cartButton];
    if ([self.cartButton pointInside:cartPoint withEvent:event]) {
        return self.cartButton;
    } else {
        return [super hitTest:point withEvent:event];
    }
}

• 关键：[self.cartButton pointInside:cartPoint withEvent:event]
  • 点在不在这个子控件self.cartButton上，不是self

  • 保证其它在self里的子控件也能正常点击