将UIButton作为子视图添加到UITabBar [英] Add a UIButton as a subview to a UITabBar

问题描述

我正在尝试在我的应用中实现可隐藏的UITabBar。我已经设置了所有的动画，并且它们运行得非常好。我只是遇到一个问题，让我的UIButton拉片显示标签栏。它没有响应触摸事件UIControlEventTouchUpInside。
我将拉标签添加到UITabBarController中的UITabBar：

I am trying to implement a hideable UITabBar in my app. I've set up all the animations, and they work very well. I'm just having an issue getting my UIButton "pull-tab" to show the tab bar. It is not responding to the touch event UIControlEventTouchUpInside. I add the pull-tab to the UITabBar in the UITabBarController:

- (void)viewDidLoad
{
    [super viewDidLoad];
//Add pull
    pullButton = [UIButton buttonWithType:UIButtonTypeCustom];
    UIImage *image = [UIImage imageNamed:@"TabBarPull.png"];
    pullButton.frame = CGRectMake(self.tabBar.frame.size.width - image.size.width, -image.size.height + 3, image.size.width, image.size.height);
    [pullButton setImage:image forState:UIControlStateNormal];
    [pullButton addTarget:self action:@selector(pullBarTapped:) forControlEvents:UIControlEventTouchUpInside];
    pullButton.userInteractionEnabled = YES;
    [self.tabBar addSubview:pullButton];
}

以下是标签栏的打开和关闭状态：

Here is what the tab bar looks like open and closed:

编辑：我已确定问题是因为按钮落在UITabBar的框架之外。看起来我将不得不把按钮放在UITabBar ...动画噩梦之外。

I've determined that the problem is because the button falls outside the UITabBar's frame. Looks like I'm going to have to put the button outside of the UITabBar... Animation nightmare.

推荐答案

你仍然可以将 UIButton 添加到 UITabBarController 的主视图中，而不是 UITabBar 虽然.... [myUITabBarController.view addSubview：pullButton]

You can still add the UIButton to the UITabBarController's main view, not in the UITabBar though.... [myUITabBarController.view addSubview:pullButton]

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