无法点击 UIView 中的按钮

Question

我在中创建了一个 menuView self.view，menuView 有两个子视图，它们是 UIView。此 UIView 包含 4 个 UIButton ，但我无法单击其中任何一个。userInteractionEnabled设置是，按钮的框架在视图调试中设置正确。代码：

更新：Github 中的项目

视图控制器.m：

- (void)viewDidLoad {
    [super viewDidLoad];
    LeftMenuView *leftView=[LeftMenuView createLeftMenuView];
    leftView.userInteractionEnabled=YES;
    self.leftView=leftView;
    [self.view addSubview:leftView];
    //nightButton
    UIButton *nightButton=[self.leftView viewWithTag:6];
    [nightButton addTarget:self action:@selector(touchButton:) forControlEvents:UIControlEventTouchUpInside];
    leftView.userInteractionEnabled=YES;
    //set
    UIButton *settingButton=[self.leftView viewWithTag:4];
    [settingButton addTarget:self.leftView action:@selector(push) forControlEvents:UIControlEventTouchUpInside];
    }

**LeftMenuView.m:**这是一个 UIView 类。这是我设置按钮和菜单的地方。

-(instancetype)initWithFrame:(CGRect)frame
{
    self=[super initWithFrame:frame];
    self.backgroundColor=[UIColor colorWithRed:26/256.f green:31/256.f blue:36/256.f alpha:0.7];
    [self addHeaderView];
    [self addButton];
    return self;
}
#pragma mark -add view to menu view
-(void)addHeaderView
{
    UIView *headViewUp=[[UIView alloc]init];
    headViewUp.userInteractionEnabled=YES;
    headViewUp.frame=CGRectMake(0, 0, yScreenWidth/2, 114);
    headViewUp.backgroundColor=ColorWithRGB(26, 31, 36);
    headViewUp.backgroundColor=[UIColor redColor];
    self.headViewUp=headViewUp;
    [self addSubview:headViewUp];
    UIView *headViewDown=[[UIView alloc]init];
    headViewDown.userInteractionEnabled=YES;
    headViewDown.frame=CGRectMake(0, yScreenHeight-50, yScreenWidth/2, 50);
    headViewDown.backgroundColor=ColorWithRGB(26, 31, 36);
    self.headViewDown=headViewDown;
    [self addSubview:headViewDown];
}
-(void)addButton
{
    UIButton *settingButton=[self setFrame:CGRectMake(yScreenWidth*2/6, 64, yScreenWidth/6, 50 ) title:@"??" image:@"Menu_Icon_Setting"];
    settingButton.userInteractionEnabled=YES;
    settingButton.tag=4;
    [self resizeTextAndImageInButton:settingButton];
    [self.headViewUp addSubview:settingButton];
    UIButton *nightButton=[self setFrame:CGRectMake(yScreenWidth/4, 0, yScreenWidth/4, 50 ) title:@"??" image:@"Menu_Day"];
    nightButton.tag=6;
    [self.headViewDown addSubview:nightButton];
}
-(UIButton *)setFrame:(CGRect)frame title:(NSString *)title image:(NSString *)imageName
{
    UIButton *button=[[UIButton alloc]initWithFrame:frame];
    [button setTitle:title forState:UIControlStateNormal];
    [button setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
    button.titleLabel.font=[UIFont systemFontOfSize:8];
    button.contentHorizontalAlignment=UIControlContentHorizontalAlignmentCenter;
    return button;
}
-(void)resizeTextAndImageInButton:(UIButton *)button
{
    [button setTitleEdgeInsets:UIEdgeInsetsMake(button.imageView.frame.size.height ,-button.imageView.frame.size.width, 0.0,0.0)];
    [button setImageEdgeInsets:UIEdgeInsetsMake(-10, 0.0,0.0, -button.titleLabel.bounds.size.width)];
}

单击按钮的方法不起作用。

Answer 1

我浏览了你的代码。你犯了一个错误，你没有为“LefMenuView”设置框架。即使你没有这样做，它的子视图也是可见的，但不可触摸或不可点击。

所以试试这个。我通过添加以下代码运行。现在我可以看到点击动作了。

Rule of thumb : if super view frame is Zero then all subviews are visible but not touchable.(Because you are touching out side of bounds).

视图控制器.m

LeftMenuView *leftView=[LeftMenuView createLeftMenuView];
leftView.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
leftView.userInteractionEnabled=YES;