UITextView，在编辑时滚动？ [英] UITextView, scroll while editing?

问题描述

我有一个大的 UITextView ，几乎全屏。如果我点击它，键盘弹出，我可以编辑文本。然而，我输入的时间越长，最终文本在视图中运行，在键盘后面。我不能再看到我在输入什么。

I've got a big UITextView, nearly full screen. If I tap it, the keyboard pops up and I can edit the text. However, the longer I type, eventually the text runs down the view, behind the keyboard. I can no longer see what I'm typing.

您如何处理这个问题？你必须跟踪光标位置并手动滚动视图吗？

How do you deal with this? Do you have to track the cursor position and scroll the view manually?

推荐答案

我想你必须调整你的UITextView作为键盘显示/隐藏。所以键盘不会超过你的textview。这是示例代码。

I guess you have to size your UITextView as keyboard shows/hides. So the keyboard won't be over your textview. Here is the sample codes.

- (void)viewDidLoad
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];
}

- (void)keyboardWillShow:(NSNotification *)notification
{
    [UIView beginAnimations:nil context:nil];
    CGRect endRect = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGRect newRect = YOUT_TEXT_VIEW.frame;
    //Down size your text view
    newRect.size.height -= endRect.size.height;
    YOUT_TEXT_VIEW.frame = newRect;
    [UIView commitAnimations];
}

- (void)keyboardWillHide:(NSNotification *)notification
{
    ... // Resize your textview when keyboard is going to hide
}

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