如何将 UIView 滑动到 UITabBar 的正上方

发布于 2024-12-18 13:23:32 字数 794 浏览 2 评论 0原文

我有一个 UIView，我想从 UITabBar 后面滑动到它的正上方。

这是行不通的。我的观点没有出现。

- (void)showNotificationBar
{   
    CGRect frame = CGRectMake(0, 500, 320, 32);
    frame.origin.y = CGRectGetMaxY(self.parentViewController.tabBarController.tabBar.frame) - frame.size.height;
    notificationBar.frame = frame;

    [self.parentViewController.tabBarController.tabBar.superview insertSubview:notificationBar 
                                                                  belowSubview:self.parentViewController.tabBarController.tabBar];

    [UIView animateWithDuration:0.5 animations:^{
        CGRect frame = notificationBar.frame;
        frame.origin.y = CGRectGetMaxY(self.parentViewController.tabBarController.tabBar.frame);
        notificationBar.frame = frame;
    }];
}

原文

I have a UIView that I want to slide from behind a UITabBar to be position right on top of it.

This doesn't work. My view does not appear.

- (void)showNotificationBar
{   
    CGRect frame = CGRectMake(0, 500, 320, 32);
    frame.origin.y = CGRectGetMaxY(self.parentViewController.tabBarController.tabBar.frame) - frame.size.height;
    notificationBar.frame = frame;

    [self.parentViewController.tabBarController.tabBar.superview insertSubview:notificationBar 
                                                                  belowSubview:self.parentViewController.tabBarController.tabBar];

    [UIView animateWithDuration:0.5 animations:^{
        CGRect frame = notificationBar.frame;
        frame.origin.y = CGRectGetMaxY(self.parentViewController.tabBarController.tabBar.frame);
        notificationBar.frame = frame;
    }];
}

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浮光之海 2024-12-25 13:23:32

像这样初始化frame.origin.y：

frame.origin.y = self.tabBarController.tabBar.frame.origin.y;

在动画块中，如下设置：

frame.origin.y -= frame.size.height;

Initialize frame.origin.y like this:

frame.origin.y = self.tabBarController.tabBar.frame.origin.y;

In the animations block, set it like this:

frame.origin.y -= frame.size.height;

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哎呦我呸! 2024-12-25 13:23:32

如果您希望它在每个视图中显示，您可以这样做：要么将其显示在每个视图的底部，要么将其显示在应用程序的窗口中。我个人更喜欢第二种方法，因为它有助于避免重复代码：

CGFloat notificationBarHeight = 40.0f;
UIView *notificationBar = [[UILabel alloc]initWithFrame:CGRectMake(0, self.tabBarController.tabBar.frame.origin.y - notificationBarHeight, 320, notificationBarHeight)];
[self.window insertSubview:notificationBar atIndex:[[self.window subviews]count]];

If you want it to show in every view, you could do to things: either show it at the bottom of every view or show it in the application's window. I personally like this second approach better because it helps avoiding duplicate code:

CGFloat notificationBarHeight = 40.0f;
UIView *notificationBar = [[UILabel alloc]initWithFrame:CGRectMake(0, self.tabBarController.tabBar.frame.origin.y - notificationBarHeight, 320, notificationBarHeight)];
[self.window insertSubview:notificationBar atIndex:[[self.window subviews]count]];

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