在 iOS 7 中动态调整标签大小 [英] Dynamically resize label in iOS 7

问题描述

在 iOS 6 中，我使用:

In iOS 6, I am using :

CGSize labelSize = [self.text sizeWithFont:self.font constrainedToSize:size lineBreakMode:self.lineBreakMode];
self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y , labelSize.width, self.frame.size.height);

动态调整 UILabel 的大小.这在 iOS 7 中不起作用，所以我尝试了:

To dynamically resize a UILabel. This does not work in iOS 7 so I tried:

NSString *text = self.text;
CGFloat width = size.width;
UIFont *font = self.font;
NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text
                                                                 attributes:@{ NSFontAttributeName: font }];

CGRect rect = [attributedText boundingRectWithSize:(CGSize){width, CGFLOAT_MAX}
                              options:NSStringDrawingUsesDeviceMetrics
                              context:nil];
CGSize size = rect.size;

self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y , size.width, self.frame.size.height);

这是在 UILabel 上的一个类别内，但这也不起作用......任何想法我应该使用什么?

This is inside a category on UILabel, but this is not working also... Any ideas what I should be using?

推荐答案

尝试这样的事情(无需自动布局):

Try something like this (working without auto-layout) :

NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
                                                           [UIFont fontWithName:@"FontName" size:15], NSFontAttributeName,
                                                            nil];

CGRect frame = [label.text boundingRectWithSize:CGSizeMake(263, 2000.0)
                                                     options:NSStringDrawingUsesLineFragmentOrigin
                                                  attributes:attributesDictionary
                                                     context:nil];

CGSize size = frame.size;

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