如果将UIView添加为子视图，则UIButton目标无法正常工作 [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，我致电:

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的未被涵盖但仅其子视图之一的部分，则可以正常工作.但是，如果我改为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.

两个子视图都是普通的UIViews，带有frame和backgroundColor.

Both subviews are plain UIViewss with a frame and backgroundColor.

如何获得水龙头以穿过" UIView并进入UIButton?

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

谢谢

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

I need to use UIControlEvents because I need UIControlEventTouchDown.

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

将子视图的userInteractionEnabled设置为NO，以使触摸通过它们并进入按钮.

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

还要确保将您的horizontal属性的惰性加载器中的_verticle.userInteractionEnabled = NO;更改为_horizontal.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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