hitTest响应分析

两个view覆盖了， 在同一层级。 怎样让遮挡的view透传，让后面被盖住的view响应?
第一种方法：
重写他们的共同supview的hittest方法。

1， 当point在对应view上，返回 这个view。 这个方法太局限了，这个view的子view无法响应。
2， 当point在对应的view上，返回 这个view的hittest。 很明显这个方法更好！

第二种方法：
重写遮挡view的pointInside方法，让其在遮挡区域的点返回NO。被盖住的view自然就响应了，子view也可以响应。

image.png

@interface MycustomUIView : UIView
@property (weak, nonatomic) UIButton *button;
@property(weak,nonatomic)UIView*view2;
@end

#import "MycustomUIView.h"

@implementation MycustomUIView

-(UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event{
    //    if(   CGRectContainsPoint(self.button.bounds, [self convertPoint:point toView:self.button]) ){
    //        return self.button;
    //    }
    //        if(   CGRectContainsPoint(self.button.bounds, [self convertPoint:point toView:self.button]) ){
    //            return [self.button hitTest:[self convertPoint:point toView:self.button] withEvent:event];
    //        }
    //    if (CGRectContainsPoint(self.view2.bounds, [self convertPoint:point toView:self.view2])) {
    //        return [self.view2 hitTest:[self convertPoint:point toView:self.view2] withEvent:event];
    //    }
    return [super hitTest:point withEvent:event];
}

//-(BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event{
//    if (CGRectContainsPoint(self.view2.bounds, [self convertPoint:point toView:self.view2])) {
//        return NO;
//    }
//    return [super pointInside:point withEvent:event];
//}
@end

@interface MycustomView2 : UIView
@property (assign, nonatomic) CGRect passthroughRect;
@end

#import "MycustomView2.h"

@implementation MycustomView2

-(BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event{
    if (CGRectContainsPoint(_passthroughRect, point)){
        return NO;
    }
    return [super pointInside:point withEvent:event];
}
@end
@interface ResponderViewController ()
@property (weak, nonatomic) IBOutlet UIButton *bottomButton;
@property (weak, nonatomic) IBOutlet UIView *view2;
@property (weak, nonatomic) IBOutlet MycustomUIView *mycustomView;

@property (weak, nonatomic) IBOutlet MycustomView2 *zedangView;

@end

@implementation ResponderViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.mycustomView.button=self.bottomButton;
    self.mycustomView.view2=self.view2;
 
    self.zedangView.passthroughRect=[self.view convertRect: self.view2.frame toView:self.zedangView] ;
}
- (IBAction)bottomButton2Action:(id)sender {
    NSLog(@" 😊  %s ",__func__);
}
- (IBAction)bototomButtonAction:(id)sender {
    NSLog(@" 😊  %s ",__func__);
}

- (IBAction)outterbuttonAction:(id)sender {
    NSLog(@" 😊  %s ",__func__);
}

@end