Cocoa touch 为UITextField或UITextView显示键盘时调整界面

我有一个表格，每个单元格包含一个标签和一个文本字段。问题是，当我编辑最后一行时，键盘会隐藏表格的下部，我看不到正在键入的内容。如何将界面移到键盘上方，以便查看正在键入的内容

谢谢，

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Mustafa

只要确保下面有足够的滚动空间即可。因为据我所知，iPhone会在其键盘出现时自动调整并显示聚焦文本框。

检查此问题：

您需要为

UIKeyboardDidShowNotification

和

UIKeyboardWillHideNotification

事件注册viewController。当你得到这些，你应该调整你的表的边界；键盘的高度为170像素，因此只需适当地缩小或扩大表格边界，并应适当地调整键盘。

删除/注释修改rect hight的行似乎可以解决问题。谢谢

修改代码：

# define kOFFSET_FOR_KEYBOARD 150.0     // keyboard is 150 pixels height

// Animate the entire view up or down, to prevent the keyboard from covering the author field.
- (void)setViewMovedUp:(BOOL)movedUp
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];

// Make changes to the view's frame inside the animation block. They will be animated instead
// of taking place immediately.
CGRect rect = self.view.frame;
CGRect textViewRect = self.textViewBeingEdited.frame;
CGRect headerViewRect = self.headerView.frame;

if (movedUp) {
    // If moving up, not only decrease the origin but increase the height so the view 
    // covers the entire screen behind the keyboard.
    rect.origin.y -= kOFFSET_FOR_KEYBOARD;
    // rect.size.height += kOFFSET_FOR_KEYBOARD;
} else {
    // If moving down, not only increase the origin but decrease the height.
    rect.origin.y += kOFFSET_FOR_KEYBOARD;
    // rect.size.height -= kOFFSET_FOR_KEYBOARD;
}

self.view.frame = rect;
[UIView commitAnimations];

---

}

此问题很复杂，具体取决于您的UI场景。这里我将讨论一个场景，其中UITextField或UITextview位于UITableViewCell中

您需要使用NSNotificationCenter来检测UIKeyboardDidShowNotification事件。 看见您需要缩小UITableView框架大小，使其仅占据键盘未覆盖的屏幕区域

如果点击UITableView单元格，操作系统将自动将该单元格定位在UITableView的查看区域内。但当您点击UITextView或UITableViewCell时，即使它位于UITableViewCell中，也不会发生这种情况

你需要打电话

[myTableView selectRowAtIndexPath:self.indexPath animated:YES scrollPosition:UITableViewScrollPositionBottom];` 

以编程方式“点击”单元格

如果实现这两点，您将看到UITextView/字段位置就在键盘上方。请记住，UITableView/字段所在的UITableViewCell不能高于“未覆盖”区域。如果你不是这样，有一种不同的方法，但我不会在这里讨论

     [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(keyboardWasShown:)
                                                     name:UIKeyboardDidShowNotification
                                                   object:nil];
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(keyboardWasHidden:)
                                                     name:UIKeyboardDidHideNotification
                                                   object:nil];
        keyboardVisible = NO;

- (void)keyboardWasShown:(NSNotification *)aNotification {
    if ( keyboardVisible )
        return;

    if( activeTextField != MoneyCollected)
    {
        NSDictionary *info = [aNotification userInfo];
        NSValue *aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
        CGSize keyboardSize = [aValue CGRectValue].size;

        NSTimeInterval animationDuration = 0.300000011920929;
        CGRect frame = self.view.frame;
        frame.origin.y -= keyboardSize.height-300;
        frame.size.height += keyboardSize.height-50;
        [UIView beginAnimations:@"ResizeForKeyboard" context:nil];
        [UIView setAnimationDuration:animationDuration];
        self.view.frame = frame;
        [UIView commitAnimations];

        viewMoved = YES;
    }

    keyboardVisible = YES;
}

- (void)keyboardWasHidden:(NSNotification *)aNotification {
    if ( viewMoved ) 
    {
        NSDictionary *info = [aNotification userInfo];
        NSValue *aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
        CGSize keyboardSize = [aValue CGRectValue].size;

        NSTimeInterval animationDuration = 0.300000011920929;
        CGRect frame = self.view.frame;
        frame.origin.y += keyboardSize.height-300;
        frame.size.height -= keyboardSize.height-50;
        [UIView beginAnimations:@"ResizeForKeyboard" context:nil];
        [UIView setAnimationDuration:animationDuration];
        self.view.frame = frame;
        [UIView commitAnimations];

        viewMoved = NO;
    }

    keyboardVisible = NO;
}

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试试这个我的编码这对u有帮助

那么从编程角度来说，我怎么知道它有170像素高呢？亲爱的@Yar，看看这里的答案：0.300000011920929-你是认真的吗？你为什么要用这个神奇的数字？我发现键盘动画需要250毫秒（至少在iPhone 6.0模拟器中）。我刚刚发现你可以在

UIKeyboardWillShowNotification

-回调中用

[[notification userInfo]objectForKey:UIKeyboardAnimationDurationUserInfoKey]以编程方式检查持续时间

。

tabelview.contentInset =  UIEdgeInsetsMake(0, 0, 210, 0);
[tableview scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:your_indexnumber inSection:Your_section]
                 atScrollPosition:UITableViewScrollPositionMiddle animated:NO];