在iPhone上的UITextView中获取光标位置？ [英] Getting cursor position in a UITextView on the iPhone?

问题描述

我们的iPhone应用程序中有一个可编辑的UITextView。当用户按下某些工具栏按钮时，我们需要在光标位置插入一些文本，但似乎无法找到找到光标当前位置的文档化（或未记录的）方法。

We have a UITextView in our iPhone app which is editable. We need to insert some text at the cursor location when the users presses some toolbar buttons but can't seem to find a documented (or undocumented) method of finding the current location of the cursor.

有没有人有任何想法或有其他人有类似的东西？

Does anybody have any ideas or has anybody else achieved anything similar?

推荐答案

像drewh说的，你可以使用UITextView的selectedRange返回插入点。该范围的长度始终为零。下面的示例显示了如何使用它。

Like drewh said, you can use UITextView's selectedRange to return the insertion point. The length of this range is always zero. The example below shows how to it.

NSString *contentsToAdd = @"some string";
NSRange cursorPosition = [tf selectedRange];
NSMutableString *tfContent = [[NSMutableString alloc] initWithString:[tf text]];
[tfContent insertString:contentsToAdd atIndex:cursorPosition.location];
[theTextField setText:tfContent];
[tfContent release];

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