Question

我有一个UINavigationController子类，在viewDidLoad中我有以下代码：

self.containerView_ = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, self.navigationController.navigationBar.frameHeight)];
    [self.containerView_ setBackgroundColor:[UIColor yellowColor]];
    [self.containerView_ setAutoresizingMask:UIViewAutoresizingNone];

    self.profileButton_ = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
    [self.profileButton_ addTarget:self action:@selector(showProfileView:) forControlEvents:UIControlEventTouchUpInside];
    [self.profileButton_ setCenterY:self.navigationController.navigationBar.frameHeight/2];
    [self.profileButton_ setImage:[UIImage imageNamed:@"profile_icon.png"] forState:UIControlStateNormal];

    self.socialButton_ = [[UIButton alloc] initWithFrame:CGRectMake(self.profileButton_.frameRight + 10, 0, 30, 30)];
    [self.socialButton_ addTarget:self action:@selector(showSocialView:) forControlEvents:UIControlEventTouchUpInside];
    [self.socialButton_ setCenterY:self.profileButton_.centerY];
    [self.socialButton_ setImage:[UIImage imageNamed:@"social_icon.png"] forState:UIControlStateNormal];

    self.notesButton_ = [[UIButton alloc] initWithFrame:CGRectMake(self.socialButton_.frameRight + 10, 0, 30, 30)];
    [self.notesButton_ addTarget:self action:@selector(showNotesView:) forControlEvents:UIControlEventTouchUpInside];
    [self.notesButton_ setCenterY:self.profileButton_.centerY];
    [self.notesButton_ setImage:[UIImage imageNamed:@"notes_icon.png"] forState:UIControlStateNormal];


    [self.containerView_ addSubview:self.profileButton_];
    [self.containerView_ addSubview:self.notesButton_];
    [self.containerView_ addSubview:self.socialButton_];

    [self.navigationBar addSubview:self.containerView_];

我可以看到UIButton，但容器背景甚至不是黄色。当我按下按钮时，不会调用UIButton的动作。知道为什么会这样吗？

Answer 1

你是UINavigationController的子类吗？

引用Apple：“此类不适用于子类化。”

调整UINavController的常用方法是从包含的UIViewController的perspecitve访问navBar。您可以将目标/操作方法放在UIViewController中。

使用按钮在UINavigationBar中添加子视图不起作用

1 个答案: