出現鍵盤時上移UIView

Question

好的，所以我已經解決了SO和教程上的幾乎所有問題。 現在，我可以向上移動UIView以便在鍵入時可以看到它。 然而問題是，我想移動UIView如果唯一 UITextField得到由鍵盤覆蓋，因為如果它不是，那么在移動沒有意義UIView 。 到目前為止，我的代碼：

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

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

#pragma mark - keyboard movements
- (void)keyboardWillShow:(NSNotification *)notification
{
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    [UIView animateWithDuration:0.3 animations:^{
        CGRect f = self.view.frame;
        f.origin.y = -keyboardSize.height;
        self.view.frame = f;
    }];
}

-(void)keyboardWillHide:(NSNotification *)notification
{
    [UIView animateWithDuration:0.3 animations:^{
        CGRect f = self.view.frame;
        f.origin.y = 0.0f;
        self.view.frame = f;
    }];
}

任何幫助將不勝感激，謝謝。

Answer 1

要檢查UITextField是否被鍵盤覆蓋，您可以執行以下操作：

- (void)keyboardWillShow:(NSNotification *)notification {
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
    if (myTextField.frame.origin.y + myTextField.frame.size.height > [UIScreen mainScreen].bounds.size.height - keyboardSize.height) {
        // textfield is covered by keyboard
        [UIView animateWithDuration:0.3 animations:^{
            CGRect f = self.view.frame;
            f.origin.y = -keyboardSize.height;
            self.view.frame = f;
        }];
    }
}