Question

我在子视图中有两个文本域作为viewLogin。当试图输入文本时，键盘正在隐藏它们。我通过移动viewLogin解决了这个问题。代码是......

- (void)textFieldDidBeginEditing:(UITextField *)textField {

    UIDeviceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

    if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight) {

        viewLogin.frame = CGRectMake((1024-viewLogin.frame.size.width)/2, (768-viewLogin.frame.size.height)/9, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
    else {
        viewLogin.frame = CGRectMake((768-viewLogin.frame.size.width)/2, (1024-viewLogin.frame.size.height)/2, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
}

- (void)textFieldDidEndEditing:(UITextField *)textField {

    UIDeviceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

    if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight) {
        viewLogin.frame = CGRectMake((1024-viewLogin.frame.size.width)/2, (768-viewLogin.frame.size.height)/2.5, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
    else {
        viewLogin.frame = CGRectMake((768-viewLogin.frame.size.width)/2, (1024-viewLogin.frame.size.height)/2, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
}

我面临的问题是，如果我首先将方向更改为横向并单击textField它的工作正常但是如果我首先在纵向模式下单击textField然后更改为横向左/右它不起作用..

可以帮助我解决这个问题....

提前致谢

Answer 1

这是Apple使用的（看看KeyboardAccessory example）：首先，在viewDidLoad

中注册键盘通知

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

并确保您在viewDidUnload

中取消注册

[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];

然后将这些方法添加到您的实现中：

- (void)keyboardWillShow:(NSNotification *)notification 
{
    NSDictionary *userInfo = [notification userInfo];

    NSValue *keyboardEndFrameValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

    CGRect keyboardRect = [keyboardEndFrameValue CGRectValue];
    keyboardRect = [self.view convertRect:keyboardRect fromView:nil];

    CGFloat keyboardTop = keyboardRect.origin.y;
    CGRect newTextViewFrame = self.view.bounds;
    newTextViewFrame.size.height = keyboardTop - self.view.bounds.origin.y;

    NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval animationDuration;
    [animationDurationValue getValue:&animationDuration];

    [UIView animateWithDuration:animationDuration
                     animations:^{
                         self.textView.frame = newTextViewFrame;
                     }];
}


- (void)keyboardWillHide:(NSNotification *)notification 
{
    NSDictionary *userInfo = [notification userInfo];

    NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval animationDuration;
    [animationDurationValue getValue:&animationDuration];

    [UIView animateWithDuration:animationDuration
                     animations:^{
                         self.textView.frame = self.view.bounds;
                     }];
}

我正在使用它，我对方向更改没有任何问题。

Answer 2

因为你的textFieldDidBeginEditing方法稍后会在第一种情况下调用，而在第二种情况下会在调用之前调用，所以你必须在你的文本字段编辑的shouldChangeCharactersInRange中编码

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
UIDeviceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

if (orientation == UIDeviceOrientationLandscapeLeft || orientation ==  UIDeviceOrientationLandscapeRight) {
    viewLogin.frame = CGRectMake((1024-viewLogin.frame.size.width)/2, (768-viewLogin.frame.size.height)/2.5, viewLogin.frame.size.width, viewLogin.frame.size.height);
}
else {
    viewLogin.frame = CGRectMake((768-viewLogin.frame.size.width)/2, (1024-viewLogin.frame.size.height)/2, viewLogin.frame.size.width, viewLogin.frame.size.height);
}
return YES;
}

Answer 3

您可以使用以下方法解决此问题...不要进入UIDeviceOrientation ..使用

UIInterfaceOrientation

- (void)textFieldDidBeginEditing:(UITextField *)textField {

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

    if (orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight) {

        viewLogin.frame = CGRectMake((1024-viewLogin.frame.size.width)/2, (768-viewLogin.frame.size.height)/9, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
    else {
        viewLogin.frame = CGRectMake((768-viewLogin.frame.size.width)/2, (1024-viewLogin.frame.size.height)/2, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
}

- (void)textFieldDidEndEditing:(UITextField *)textField {

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

    if (orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight) {
        viewLogin.frame = CGRectMake((1024-viewLogin.frame.size.width)/2, (768-viewLogin.frame.size.height)/2.5, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
    else {
        viewLogin.frame = CGRectMake((768-viewLogin.frame.size.width)/2, (1024-viewLogin.frame.size.height)/2, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
}
     -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
        {

            if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {

                viewLogin.frame = CGRectMake((1024-viewLogin.frame.size.width)/2, (768-viewLogin.frame.size.height)/9, viewLogin.frame.size.width, viewLogin.frame.size.height);
            }
            else {
                viewLogin.frame = CGRectMake((768-viewLogin.frame.size.width)/2, (1024-viewLogin.frame.size.height)/2, viewLogin.frame.size.width, viewLogin.frame.size.height);
            }
            return YES;
        }

Answer 4

注册到UIKeyboardWillShowNotification，并将此代码移动到抛出通知时调用的方法。因此，如果您首先在纵向模式下单击textField然后更改为横向，则首先调用此方法。在更改框架之前不要忘记检查方向。（即，仅在方向为横向时才进行）

编辑 - 添加代码

在您的视图中加载（或在适当的地方），

    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
    [nc addObserver:self selector:@selector(keyBoardWillShow:) name:@"UIKeyboardWillShowNotification" object:nil];

方法keyBoardWillShow：

-(void)keyBoardWillShow:(NSNotification *)noti {
     UIDeviceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

    if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight) {

        viewLogin.frame = CGRectMake((1024-viewLogin.frame.size.width)/2, (768-viewLogin.frame.size.height)/9, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
    else {
        viewLogin.frame = CGRectMake((768-viewLogin.frame.size.width)/2, (1024-viewLogin.frame.size.height)/2, viewLogin.frame.size.width, viewLogin.frame.size.height);
    }
}

当方向改变时，键盘隐藏textField？

4 个答案: