第一步：NSMutableAttributedString与NSString关联

NSString *pingguString = [NSStringstringWithFormat:@"%@%@",pingguString1,pingguString2];

NSMutableAttributedString *str = [[NSMutableAttributedStringalloc]initWithString:pingguString];

 第二步：设置字体颜色和大小  （NSForegroundColorAttributeName和NSFontAttributeName只支持ios6以上）

    [str addAttribute:NSForegroundColorAttributeNamevalue:(id)[UIColorredColor].CGColorrange:NSMakeRange(0, pingguString1.length)];

    [str addAttribute:NSFontAttributeNamevalue:[UIFontsystemFontOfSize:13]range:NSMakeRange(0, pingguString1.length)];

    [str addAttribute:NSForegroundColorAttributeNamevalue:[UIColorredColor]range:NSMakeRange(pingguString1.length, pingguString2.length)];

    [str addAttribute:NSFontAttributeNamevalue:[UIFontsystemFontOfSize:13]range:NSMakeRange(pingguString1.length, pingguString2.length)];

第三步：NSMutableAttributedString与UILabel关联

    UILabel * label = [[UILabelalloc]initWithFrame:rect];

    [label setFont:[UIFontsystemFontOfSize:fonSize]];

    [label setBackgroundColor:Color];

    [label setTextAlignment:alignment];

    [label setNumberOfLines:2];

    [label setTag:tag];

    [label setLineBreakMode:UILineBreakModeWordWrap];

    label.attributedText = str;

    [self.contentViewaddSubview:label];

    [str release];