iphone - 键盘隐藏TabBar

Question

我正在使用 TabBar 应用程序。在一个 View 中，有一个 UISearchBar，按下 时，会出现键盘。

问题是键盘隐藏了标签栏。

你知道如何解决吗？

Answer 1

自从提出这个问题以来已经有一段时间了，但为了文档的缘故，这里是这样的:首先订阅NSNotificationCenter来接收键盘通知:

-(void) viewWillAppear:(BOOL)animated
{
 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillToggle:)
                                             name:UIKeyboardWillShowNotification object:nil];
 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillToggle:)
                                             name:UIKeyboardWillHideNotification object:nil];
}

不要忘记取消订阅

- (void)viewWillDisappear:(BOOL)animated 
{
 [self.view endEditing:YES];
 [super viewWillDisappear:animated];
 [[NSNotificationCenter defaultCenter] removeObserver:self
                                                name:UIKeyboardWillShowNotification object:nil];
 [[NSNotificationCenter defaultCenter] removeObserver:self
                                                name:UIKeyboardWillHideNotification  object:nil];
}

然后实现通知中心会调用的函数:

- (void) keyboardWillToggle:(NSNotification *)aNotification
{
 CGRect frame = [[[self tabBarController] tabBar] frame];
 CGRect keyboard = [[aNotification.userInfo valueForKey:@"UIKeyboardFrameEndUserInfoKey"] CGRectValue];
 frame.origin.y = keyboard.origin.y - frame.size.height;
 [UIView animateWithDuration:[[aNotification.userInfo valueForKey:@"UIKeyboardAnimationDurationUserInfoKey"] floatValue] animations:^
 {
     [[[self tabBarController] tabBar] setFrame:frame];
 }];

这将使 TabBar 按照键盘的速度设置动画并保持在顶部。