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我们打开了一个显示键盘的视图，但是当单击后退按钮时，视图从右侧滑出，而键盘只有在视图消失时才会滑动。如果我们在 viewwilldisappear 时调用 resignFirstResponder，view 会向右滑动，同时键盘向下滑动。是否可以让键盘随视图滑出？

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4 回答 4

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没有标准的方法来做你想做的事，但是......
基本上，键盘只是一个视图，呈现在它自己的 UIWindow 中，位于所有其他窗口之上。
因此，理论上，您需要做的是找到键盘视图并将其移动到所需的方向。我认为你应该使用transform属性，不要搞砸frame. 

Class keyboardClass = NSClassFromString(@"UIPeripheralHostView");
for ( UIWindow *window in [[UIApplication sharedApplication] windows] ) {
    for ( UIView *subview in window.subviews ) {
        if ( [subview isKindOfClass:keyboardClass] ) {
            // that's keyboard
        }
    }
}

已编辑：
如果您在谈论 UINavigationController 并且它是推送/弹出期间的默认幻灯片动画，那么您只需要在文本视图中调用resignFirstResponderinviewDidDisappear和becomeFirstResponderin即可。viewWillAppear这样，您的键盘将随着您的视图滑动。

于 2012-04-27T05:45:53.893 回答
1

我已经对此进行了测试，它适用于 iOS 5.1，但是，我认为这不是推荐的行为。

    for (UIWindow *keyboardWindow in [[UIApplication sharedApplication] windows])
    if ([[keyboardWindow description] hasPrefix:@"<UITextEffectsWindow"]) {
        NSLog(@"%@", [keyboardWindow description]);
        [UIWindow beginAnimations:@"fadeKeyboard" context:nil];
        keyboardWindow.frame = CGRectMake(keyboardWindow.frame.origin.x + keyboardWindow.frame.size.width, keyboardWindow.frame.origin.y, keyboardWindow.frame.size.width, keyboardWindow.frame.size.height);
        [UIWindow commitAnimations];
    }

您还可以使用通知 UIKeyboardWillHideNotification 来检测键盘何时要隐藏，或者手动使用上面的代码。

于 2012-04-27T05:59:38.017 回答
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尝试坚持resignFirstresponder使用该viewDidDisappear方法。

于 2012-04-27T04:19:17.583 回答
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          **Set notificatins and use these methods.....Hope it solve problem:

           First of all set your whole view in scrollView**
          -(void)keyboardDidHide:(NSNotification *)notif
     {
          NSTimeInterval duration = 0.4;
             [UIView animateWithDuration:duration animations:
                ^{
              scrollView.contentSize=CGSizeMake(320,scrollOriginalFrame.size.height);
               }];
              keyboardVisible=NO;
     }
     -(void)keyboardDidShow:(NSNotification *)notif
     {

         scrollView.contentSize=CGSizeMake(self.view.frame.size.width, scrollOriginalFrame.size.height+235);
         NSTimeInterval duration = 0.4;

        [UIView animateWithDuration:duration animations:
          ^{
             [scrollView setContentOffset:CGPointMake(0,162) animated:YES];

        }];
           keyboardVisible=YES;
           }
               **In viewDidLoad() add this**

        //keyboard
        scrollOriginalFrame=self.view.frame;
          scrollOriginalFrame.size.height-=103;
         scrollView.contentSize=scrollOriginalFrame.size;
             [[NSNotificationCenter defaultCenter] addObserver:self                   selector:@selector(keyboardDidShow:) name:UIKeyboardWillShowNotification object:nil];
               [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardWillHideNotification object:nil];
keyboardVisible=NO;
于 2012-04-27T04:35:20.383 回答