iOS中UILabel text两边对齐的实现代码

-(NSAttributedString *)setTextString:(NSString *)text
{  NSMutableAttributedString *mAbStr = [[NSMutableAttributedString alloc] initWithString:text];
  NSMutableParagraphStyle *npgStyle = [[NSMutableParagraphStyle alloc] init];
  npgStyle.alignment = NSTextAlignmentJustified;
  npgStyle.paragraphSpacing = 11.0;
  npgStyle.paragraphSpacingBefore = 10.0;
  npgStyle.firstLineHeadIndent = 0.0;
  npgStyle.headIndent = 0.0;
  NSDictionary *dic = @{
             NSForegroundColorAttributeName:[UIColor blackColor],
             NSFontAttributeName      :[UIFont systemFontOfSize:15.0],
             NSParagraphStyleAttributeName :npgStyle,
             NSUnderlineStyleAttributeName :[NSNumber numberWithInteger:NSUnderlineStyleNone]
             };
  [mAbStr setAttributes:dic range:NSMakeRange(0, mAbStr.length)];
  NSAttributedString *attrString = [mAbStr copy];
  return attrString;
}
NSString* const msg = @"6日，“幼儿园老师让带一条鱼”的微博突然间就火了！占领朋友圈！征服全国网友.图片甚至遭网友恶搞：水煮鱼、生鱼片都出来了。1月7日，记者在茫茫人海之中，历经千辛万苦终于在浙江慈溪找到了这位被网友吐槽的“粗心”家长！来听听他的解释吧";
self.lbView.attributedText = [self setTextString:msg];