Question

我正在使用故事板开发一个iPad应用程序。对于我的iPad应用程序，我需要在一个屏幕上显示4 UICollectionView。但是我没有足够的空间来显示所有4 {{1}所以我需要向视图控制器添加一个滚动视图，并在collectionView中的scrollview.Each单元格内显示CollectionViews，所有集合视图都有一个textfield.But如果出现键盘，则第3个CollectionView和第4个CollectionView躲在键盘后面。所以我需要做的是在键盘出现时将CollectionViews和我的视图放在滚动视图中。需要有关此的指导。

感谢。

Answer 1

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

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

- (void)keyboardIsShown:(NSNotification*)notification
{
         NSDictionary* info = [notification userInfo];
        CGSize keyboardSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
    //Adjust your scrollview frame by reducing the height by keyboardSize.Height

}

- (void)keyboardWillBeHidden:(NSNotification*)notification
{
     // Set the scrollview frame back to normal.
}

Answer 2

您需要使用键盘通知。一个例子可能是这样的：

在viewDidLoad：

中

[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil]; //This gets triggered when the keyboard comes up. 

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil]; // This gets triggered when the keyboard goes down.

在代码中的某处，您可以实现处理scrollView的方法，如下所示：

-(void)keyboardWillShow:(NSNotification *)notification {

// Code to move the UIScrollView up when the keyboard comes up

}



-(void)keyboardWillHide:(NSNotification *)notification {

// Code to move the UIScrollView down when the keyboard goes down. 

}

修改

这在 tutorial
中有明确解释

当键盘出现iOS时，Scrollview和View会上升

2 个答案: