本文介绍了当混合中有新行字符时，UITextView firstRectForRange无法正常工作的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用此方法将NSRange转换为CGRect，因为它与UITextView相关：
I'm using this method for converting a NSRange to a CGRect as it relates to a UITextView:
- (CGRect)frameOfTextRange:(NSRange)range inTextView:(UITextView *)textView
{
UITextPosition *beginning = textView.beginningOfDocument;
UITextPosition *start = [textView positionFromPosition:beginning offset:range.location];
UITextPosition *end = [textView positionFromPosition:beginning offset:range.location+range.length];
UITextRange *textRange = [textView textRangeFromPosition:start toPosition:end];
CGRect rect = [textView firstRectForRange:textRange];
return rect;
}
的回答让有人问我同样的问题。上述方法适用于此：
This question's answer has someone asking the same question as me. The above method works great for this:
这样不太好：
this is a great one
(new line)
(new line)
findthistoken
似乎简单地忽略了有2个新行字符的事实？ ：/
It seems to simply ignore the fact that there are 2 new lines characters? :/
如何使用新行字符？
推荐答案
您可以强制self.textView立即确保textView的布局
You can force self.textView to ensure the layout of textView immediately with
[self.textView.layoutManager ensureLayoutForTextContainer:self.textView.textContainer];
在你的frameOfTextRange：call之前放置它会给你正确的矩形。
Placing that before your frameOfTextRange: call will gives you right rect.
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