父文本的使用

UILabel *testLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 100, 320, 30)];

   testLabel.backgroundColor = [UIColor lightGrayColor];

   testLabel.textAlignment = NSTextAlignmentCenter;

   NSMutableAttributedString *AttributedStr = [[NSMutableAttributedString alloc]initWithString:@"今天天气不错呀"];

   [AttributedStr addAttribute:NSFontAttributeName

                         value:[UIFont systemFontOfSize:16.0]

                         range:NSMakeRange(2, 2)];

   [AttributedStr addAttribute:NSForegroundColorAttributeName

                         value:[UIColor redColor]

                         range:NSMakeRange(2, 2)];

   testLabel.attributedText = AttributedStr;

   [self.view addSubview:testLabel];