这里有很多答案，但这很有效，而且比大多数答案都短得多：

- (void)textFieldDidBeginEditing:(UITextField *)sender
{
    UIScrollView *scrollView = (UIScrollView *)self.view; // assuming this method is pasted into the UIScrollView's controller
    const double dontHardcodeTheKeyboardHeight = 162;
    double textY = [sender convertPoint:CGPointMake(0, 0) toView:scrollView].y;
    if (textY - scrollView.contentOffset.y + sender.frame.size.height > self.view.frame.size.height - dontHardcodeTheKeyboardHeight)
        [scrollView setContentOffset:CGPointMake(0.0, textY - 10) animated:YES];
}

要恢复到原始视图状态，请添加：

-(void)textFieldDidEndEditing:(UITextField *)sender

{
    //move the main view, so that the keyboard does not hide it.
    if  (self.view.frame.origin.y < 0)
    {
        [self setViewMovedUp:NO];
    }
}

我对UIScrollView由多个UITextField组成也有很多问题，其中一个或多个在编辑时会被键盘遮挡。

如果UIScrollView滚动不正确，请考虑以下几点。

1） 确保contentSize大于UIScrollView框架大小。理解UIScrollViews的方法是UIScrollView就像一个查看contentSize中定义的内容的窗口。因此，如果要让UIScrollview滚动到任何位置，contentSize必须大于UIScrollview。否则，不需要滚动，因为contentSize中定义的所有内容都已可见。BTW，默认contentSize=CGSizeZero。

2） 既然您已经了解到UIScrollView实际上是一个“内容”窗口，那么确保键盘不会遮挡UIScroll View的查看“窗口”的方法就是调整UIScrollView的大小，这样当键盘出现时，UIScrollView窗口的大小就等于UIScrollviewframe.size.height减去键盘的高度。这将确保您的窗口仅是那个小的可视区域。

3） 这里有一个陷阱：当我第一次实现这一点时，我想我必须获得编辑文本字段的CGRect，并调用UIScrollView的scrollRecToVisible方法。我通过调用scrollRecToVisible方法实现了UITextFieldDelegate方法textFieldDidBeginEditing。这实际上产生了一个奇怪的副作用，即滚动会将UITextField捕捉到位。在很长一段时间里，我都搞不清那是什么。然后我注释了textFieldDidBegginEditingDelegate方法，这一切都奏效了！！(???). 事实证明，我相信UIScrollView实际上隐式地将当前编辑的UITextField带入可视窗口。我对UITextFieldDelegate方法的实现以及随后对scrollRecToVisible的调用是多余的，这是产生奇怪副作用的原因。

因此，当键盘出现时，以下是在UIScrollView中正确滚动UITextField的步骤。

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.

- (void)viewDidLoad 
{
    [super viewDidLoad];

    // register for keyboard notifications
    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(keyboardWillShow:) 
                                                 name:UIKeyboardWillShowNotification 
                                               object:self.view.window];
    // register for keyboard notifications
    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(keyboardWillHide:) 
                                                 name:UIKeyboardWillHideNotification 
                                               object:self.view.window];
    keyboardIsShown = NO;
    //make contentSize bigger than your scrollSize (you will need to figure out for your own use case)
    CGSize scrollContentSize = CGSizeMake(320, 345);
    self.scrollView.contentSize = scrollContentSize;
}

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

    // get the size of the keyboard
    CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;


    // resize the scrollview
    CGRect viewFrame = self.scrollView.frame;
    // I'm also subtracting a constant kTabBarHeight because my UIScrollView was offset by the UITabBar so really only the portion of the keyboard that is leftover pass the UITabBar is obscuring my UIScrollView.
    viewFrame.size.height += (keyboardSize.height - kTabBarHeight);

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [self.scrollView setFrame:viewFrame];
    [UIView commitAnimations];

    keyboardIsShown = NO;
}

- (void)keyboardWillShow:(NSNotification *)n
{
    // This is an ivar I'm using to ensure that we do not do the frame size adjustment on the `UIScrollView` if the keyboard is already shown.  This can happen if the user, after fixing editing a `UITextField`, scrolls the resized `UIScrollView` to another `UITextField` and attempts to edit the next `UITextField`.  If we were to resize the `UIScrollView` again, it would be disastrous.  NOTE: The keyboard notification will fire even when the keyboard is already shown.
    if (keyboardIsShown) {
        return;
    }

    NSDictionary* userInfo = [n userInfo];

    // get the size of the keyboard
    CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

    // resize the noteView
    CGRect viewFrame = self.scrollView.frame;
    // I'm also subtracting a constant kTabBarHeight because my UIScrollView was offset by the UITabBar so really only the portion of the keyboard that is leftover pass the UITabBar is obscuring my UIScrollView.
    viewFrame.size.height -= (keyboardSize.height - kTabBarHeight);

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [self.scrollView setFrame:viewFrame];
    [UIView commitAnimations];
    keyboardIsShown = YES;
}

在viewDidLoad上注册键盘通知在viewDidUnload中注销键盘nofitions确保contentSize设置为大于UIScrollView at viewDidLoad当有键盘时，缩小UIScrollView当键盘离开时，恢复UIScrollView。使用ivar来检测键盘是否已经显示在屏幕上，因为每次UITextField选项卡时都会发送键盘通知，即使键盘已经存在，以避免在UIScrollView已经缩小时缩小它

需要注意的一点是，当您单击另一个UITextField时，即使键盘已经在屏幕上，UIKeyboardWillShowNotification也会启动。当键盘已经在屏幕上时，我使用ivar来避免调整UIScrollView的大小。当键盘已经存在时，不小心调整UIScrollView的大小将是灾难性的！

希望这段代码能让你们中的一些人省去很多麻烦。

Shiun表示：“事实证明，我相信UIScrollView实际上隐式地将当前编辑的UITextField带入可视窗口。”这似乎适用于iOS 3.1.3，但不适用于3.2、4.0或4.1。为了使UITextField在iOS上可见，我必须添加一个显式的scrollRectToVisible。

在（BOOL）textFieldShouldBeginEditing:（UITextField*）textField中

if (textField.frame.origin.y > self.view.frame.size.height - 216)
    {
        if (screenHeight>500)
            scrollView.contentSize = CGSizeMake(0.0, scrollView.contentSize.height + 100);
        else
            scrollView.contentSize = CGSizeMake(0.0, scrollView.contentSize.height + 216);
        CGPoint scrollPoint = CGPointMake(0.0,(textField.frame.origin.y - (self.view.frame.size.height - 216 - textField.frame.size.height - 20)));
        [scrollView setContentOffset:scrollPoint animated:YES];
    }
    [scrollView setScrollEnabled:YES];

辞职时，你需要写以下代码

scrollView.contentSize = CGSizeMake(0.0, 640);
CGPoint scrollPoint = CGPointMake(0.0,0.0);
[scrollView setContentOffset:scrollPoint animated:YES]; 

本文档详细介绍了此问题的解决方案。查看“移动位于键盘下的内容”下的源代码。这很简单。

编辑：注意到示例中有一个小故障。您可能希望侦听UIKeyboardWillHideNotification，而不是UIKeyboard DidHideNotification。否则，在键盘关闭动画期间，键盘后面的滚动视图将被剪裁。