如果将 UIView 添加为子视图，则 UIButton 目标不起作用 [英] UIButton targets not working if a UIView is added as a subview

问题描述

我有一个 UIButton.它有两个子视图.然后我打电话:

I have a UIButton. It has two subviews. I then call:

[createButton addTarget:self action:@selector(openComposer) forControlEvents:UIControlEventTouchUpInside];

如果我点击 UIButton 中未被覆盖但它的子视图之一的部分，它可以正常工作.但是，如果我点击其中一个子视图，它不会触发操作.

If I tap the parts of the UIButton that aren't covered but one of its subviews, it works fine. However if I tap one of the subviews instead, it does not trigger the action.

在两个子视图上，我都将 .userInteractionEnabled 设置为 YES.

On both subviews, I has .userInteractionEnabled set to YES.

两个子视图都是带有 frame 和 backgroundColor 的普通 UIViews.

Both subviews are plain UIViewss with a frame and backgroundColor.

如何让点击通过"UIView 并进入 UIButton?

How can I get the tap to "pass through" the UIView and onto the UIButton?

谢谢

我需要使用 UIControlEvents，因为我需要 UIControlEventTouchDown.

I need to use UIControlEvents because I need UIControlEventTouchDown.

编辑 2:

这是按钮的代码.

@interface CreateButton ()

@property (nonatomic) Theme *theme;
@property (nonatomic) UIView *verticle;
@property (nonatomic) UIView *horizontal;
@property (nonatomic) BOOL mini;

@end

@implementation CreateButton

#pragma mark - Accessors

- (UIView *)verticle {
    if (! _verticle) {
        _verticle = [[UIView alloc] init];
        _verticle.backgroundColor = [self.theme colorForKey:@"createButtonPlusBackgroundColor"];
        _verticle.userInteractionEnabled = NO;
    }
    return _verticle;
}

- (UIView *)horizontal {
    if (! _horizontal) {
        _horizontal = [[UIView alloc] init];
        _horizontal.backgroundColor = [self.theme colorForKey:@"createButtonPlusBackgroundColor"];
        _verticle.userInteractionEnabled = NO;
    }
    return _horizontal;
}

#pragma mark - Init

- (instancetype)initWithTheme:(Theme *)theme frame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        _theme = theme;

        self.layer.cornerRadius = roundf(frame.size.width / 2);
        self.layer.shadowColor = [UIColor blackColor].CGColor;
        self.layer.shadowOpacity = .1f;
        self.layer.shadowOffset = CGSizeZero;
        self.layer.shadowRadius = 15.f;
        self.backgroundColor = [self.theme colorForKey:@"createButtonBackgroundColor"];

        [self addSubview:self.verticle];
        [self addSubview:self.horizontal];

        [self addTarget:self action:@selector(animate) forControlEvents:UIControlEventTouchDown];
        [self addTarget:self action:@selector(animate) forControlEvents:UIControlEventTouchUpInside];
        [self addTarget:self action:@selector(animate) forControlEvents:UIControlEventTouchUpOutside];
    }
    return self;
}

#pragma mark - Actions

- (void)animate {
    [UIView animateWithDuration:0.2 delay:0 usingSpringWithDamping:0.4 initialSpringVelocity:8 options:kNilOptions animations:^{
        if (self.mini) {
            self.transform = CGAffineTransformMakeScale(1.0, 1.0);
            self.mini = NO;
        } else {
            self.transform = CGAffineTransformMakeScale(0.90, 0.90);
            self.mini = YES;
        }
    } completion:nil];
}

#pragma mark - UIView

- (void)layoutSubviews {
    CGSize size = self.bounds.size;

    NSInteger width = 3;
    NSInteger verticleInset = 12;
    self.verticle.frame = CGRectMake((size.width - width) / 2, verticleInset, width, size.height - (verticleInset * 2));
    self.horizontal.frame = CGRectMake(verticleInset, (size.height - width) / 2, size.width - (verticleInset * 2), width);
}

@end

推荐答案

将您的子视图的 userInteractionEnabled 设置为 NO 以让触摸通过它们并到达您的按钮.

Set userInteractionEnabled to NO for your subviews to let touches pass through them and onto your button.

还要确保将延迟加载器中 horizo​​ntal 属性的 _verticle.userInteractionEnabled = NO; 更改为 _horizo​​ntal.userInteractionEnabled = NO; 因为我认为这是一个错字.

Also make sure to change _verticle.userInteractionEnabled = NO; in your lazy-loader for your horizontal property to _horizontal.userInteractionEnabled = NO; as I believe that's a typo.

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