UIKeyboardWillShowNotification 在 iOS 7 上不起作用

Question

UIKeyboard 将显示和隐藏通知方法在 iOS8 及更高版本中可以正常工作，但在 iOS7 中无法正常工作。有没有其他选择？

我的应用部署目标是 iOS7。

我的代码在这里

- (void)viewDidLoad
{
[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWasShown:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(HideKeyboard:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];
}

- (void)keyboardWasShown:(NSNotification *)sender
{
    CGSize kbSize =
        [[[sender userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

    if (!scroll) {
        scrollValue = self.WholeScreenUIView.frame.origin.y - kbSize.height;
    }

    scroll = YES;
}

- (void)HideKeyboard:(NSNotification *)sender
{

    scroll = NO;

    scrollValue = 0.0;
}

提前致谢。

Answer 1

使用此代码..

 [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(keyboardWillHideHandler:)
                                                     name:UIKeyboardWillHideNotification
                                                   object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillshowHandler:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];

- (void) keyboardWillHideHandler:(NSNotification *)notification {
   [scroll setContentOffset:CGPointMake(0, 0) animated:YES];
}

- (void) keyboardWillshowHandler:(NSNotification *)notification {
    [scroll setContentSize:CGSizeMake(self.view.frame.size.width, self.view.frame.size.height+44)];

}

希望这会有所帮助。这适用于我的情况