OC - 属性attributedText的使用

• 代码如下：

 UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 200, 300, 100)];
[self.view addSubview:label];
/** 设置分行 */
label.numberOfLines = 0;
label.lineBreakMode = NSLineBreakByTruncatingTail;
/** 设置字符串属性 */    
NSString *string = @"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX---";
NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:string];
[str addAttribute:NSForegroundColorAttributeName value:[UIColor purpleColor] range:NSMakeRange(0,16)];   
[str addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:20.0] range:NSMakeRange(0,5)];
/** --- */    
label.attributedText = str;

• 效果如图：