iOS button被view遮住，想点击怎么破

UIView的提供了这个方法：- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event;

1.创建CustomView继承自UIView :

CustomView.h

@property (strong,nonatomic)NSArray * passthroughViews;

@property (nonatomic)BOOL testHits;

-(BOOL) isPassthroughView: (UIView*) view;

CustomView.m

-(UIView*) hitTest:(CGPoint)point withEvent:(UIEvent *)event{

if(self.testHits){

return nil;

}

if(!self.passthroughViews

|| (self.passthroughViews && self.passthroughViews.count == 0)){

return self;

} else {

UIView *hitView = [super hitTest:point withEvent:event];

if (hitView == self) {

self.testHits = YES;

CGPoint superPoint = [self.superview convertPoint:point fromView:self];

UIView *superHitView = [self.superview hitTest:superPoint withEvent:event];

self.testHits = NO;

if ([self isPassthroughView:superHitView]) {

hitView = superHitView;

}

}

return hitView;

}

}

- (BOOL)isPassthroughView:(UIView *)view {

if (view == nil) {

return NO;

}

if ([self.passthroughViews containsObject:view]) {

return YES;

}

return [self isPassthroughView:view.superview];

}

2.创建ViewController继承自UIViewController :

ViewController.m

- (void)viewDidLoad {

[super viewDidLoad];

self.passthroughButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

[self.passthroughButton setTitle:@"Passthrough" forState:UIControlStateNormal];

[self.view addSubview:self.passthroughButton];

self.passthroughButton.frame = CGRectMake(20, 50, 120, 28);

[self.passthroughButton addTarget:self action:@selector(push) forControlEvents:UIControlEventTouchUpInside];

CustomView *customView = [[CustomView alloc] initWithFrame:CGRectMake(80, 10, 300, 200)];

customView.backgroundColor = [UIColor colorWithRed:1 green:0 blue:0 alpha:.5];

//customView.passthroughViews = [NSArray arrayWithObject:self.passthroughButton];

[self.view addSubview:customView];

}