ios6 - NSTextAlignment对齐到iOS6上的UILabel文本对齐方式将崩溃

Question

我现在使用Xcode4.5和iOS6，iOS6更改了UILable的textAlignment，

label.textAlignment = NSTextAlignmentJustified;

该代码将在带有ios6 SDK的iPhone 6.0 Simulator上崩溃。但不会在装有iOS6 SDK的iPhone 5.0 Simulator上崩溃。

iOS6支持NSTextAlignmentJustified，但是为什么会崩溃？

Answer 1

编辑1:

使用NSAttributedString我们可以证明文本合理。

NSMutableParagraphStyle *paragraphStyles = [[NSMutableParagraphStyle alloc] init];
paragraphStyles.alignment                = NSTextAlignmentJustified;
paragraphStyles.firstLineHeadIndent      = 0.05;    // Very IMP

NSString *stringTojustify                = @"We are what our thoughts have made us; so take care about what you think. Words are secondary. Thoughts live; they travel far.";
NSDictionary *attributes                 = @{NSParagraphStyleAttributeName: paragraphStyles};
NSAttributedString *attributedString     = [[NSAttributedString alloc] initWithString:stringTojustify attributes:attributes];

self.lblQuote.attributedText             = attributedString;
self.lblQuote.numberOfLines              = 0;
[self.lblQuote sizeToFit];

弃用UITextAlignmentJustify，在iOS 6下不再可用。

在SO link上也给出了所有对正当文本的可能解决方案
看看this page和iOS6 prerelease Documentation。