在iOS6上的UITextView上使用attributText（NSAttributedString）只能使用段落样式或字体，但不能同时使用 [英] Using attributedText (NSAttributedString) on a UITextView on iOS6 only works with paragraph style or font but not both

问题描述

我一直在试图使用属性UITextView的属性添加可调整的行高我的自定义UITextView。我的代码在模拟器中正常工作，但我无法使其在iPhone5上工作。如果我删除字体行，行高工作，但它的文本恢复为默认较小的字体。如果我添加字体，字体工作，但段落样式被忽略。我试着在一个新鲜的应用程序的vanilla UITextView的代码具有相同的行为，这让我认为这是一个iOS6的错误。有没有人有更好的运气？

我也尝试过各种UITextView替换添加行高度功能，但到目前为止还没有成功。

我的代码如下所示：

  ... 
 NSMutableParagraphStyle * paragraphStyle = [NSMutableParagraphStyle alloc] init]; 
 paragraphStyle.minimumLineHeight = lineHeight; 
 paragraphStyle.maximumLineHeight = lineHeight; 
 
 NSString * text = self.text; 
 NSMutableAttributedString * attributingString = [[NSMutableAttributedString alloc] initWithString：text]; 
 
 [attributString addAttribute：NSParagraphStyleAttributeName value：paragraphStyle range：NSMakeRange（0，text.length）]; 
 [attributString addAttribute：NSFontAttributeName value：self.font range：NSMakeRange（0，text.length）]; 
 
 self.attributedText = attributString;感谢任何人的任何确认或建议！
 
 
 
 h2_lin>解决方案
我认为这确实是一个错误。我在过去几天一直在努力，没有找到任何合理的解释。
 
 
 
此外，如果你使用IB来设置你的UITextView，的那些属性将不会被设置为它应该的。
 
 
 
无论如何，我刚刚提交了一个错误。  http://openradar.appspot.com/radar?id=2278401  
 
 
 
 Matt 
 
I have been trying to use the attributedText property of UITextView to add adjustable line height to my custom UITextView. My code works fine in the simulator, but I am unable to make it work on an iPhone5. If I remove the font line the line height works but it the text reverts to a default smaller font. If I add the font, the font works but the paragraph styling is ignored. I have tried the code on a vanilla UITextView in a fresh app with the same behavior, which makes me think this is an iOS6 bug. Has anyone had any better luck?

I have also tried various UITextView replacements to add line height functionality, but nothing has worked out so far.

My code looks like this:
...
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.minimumLineHeight = lineHeight;
paragraphStyle.maximumLineHeight = lineHeight;

NSString *text = self.text;
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:text];

[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, text.length)];
[attributedString addAttribute:NSFontAttributeName value:self.font range:NSMakeRange(0, text.length)];

self.attributedText = attributedString;
Thanks for any confirmation or suggestions anyone has!
解决方案
I think this is indeed a bug. I've been struggling with it for the past few days and couldn't find any reasonable explanation.

Also, if you use IB to set up your UITextView, a few of those attributes won't be set as it should.

Anyway, I just filed a bug on that. http://openradar.appspot.com/radar?id=2278401

Matt

                        
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