在iOS 7.0.3中使用boundingRectWithSize的UILabel渲染问题

我试图调整UILabel的大小以适应NSString的界限,但我在iOS 7.0.3和iOS 7.1.1中看到了不同的结果.如下所示,iOS 7.0.3似乎无法正确绘制文本.

示例1：文本绘制在标签的底部,几乎在边界之外：

示例2：文本在1行(而不是2)上绘制,并且不进行自动换行,仅尾部截断.

这是我在上面列出的两个iOS版本中使用的代码.

@H_944_13@CGSize boundingSize = CGSizeMake(214,9999); CGRect boundingRect = CGRectZero; [self.nameLabel setnumberOfLines:2]; // for iOS7 if([self.place.placename respondsToSELEctor:@SELEctor(boundingRectWithSize:options:attributes:context:)]){ NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy]; [paragraphStyle setLineBreakmode:NSLineBreakByWordWrapping]; boundingRect = [self.place.placename boundingRectWithSize:boundingSize options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary DictionaryWithObjectsAndKeys: self.nameLabel.font,NSFontAttributename,paragraphStyle,NSParagraphStyleAttributename,nil] context:nil]; }else{ // pre iOS7 CGSize size = [self.place.placename sizeWithFont:self.nameLabel.font consTrainedToSize:boundingSize lineBreakmode:NSLineBreakByWordWrapping]; boundingRect = CGRectMake(0,size.width,size.height); } [self.nameLabel setFrame:CGRectMake(CGRectGetMaxX(self.photoImageView.framE)+15,CGRectGetMinY(self.photoImageView.framE),boundingRect.size.width,boundingRect.size.height)]; [self.nameLabel setText:[place placename]];

有任何想法吗？提前致谢.