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UILabel* noteLabel = [[UILabel alloc] init];
noteLabel.frame = CGRectMake(60, 100, 200, 100);
noteLabel.textColor = [UIColor blackColor];
noteLabel.numberOfLines = 2;

NSMutableAttributedString *noteStr = [[NSMutableAttributedString alloc] initWithString:@"µã»÷×¢²á°´Å¥,¼´±íʾÄúÒÑͬÒâÒþ˽Ìõ¿îºÍ·þÎñЭÒé"];
NSRange redRange = NSMakeRange([[noteStr string] rangeOfString:@"×¢²á"].location, [[noteStr string] rangeOfString:@"×¢²á"].length);
[noteStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:redRange];

NSRange redRangeTwo = NSMakeRange([[noteStr string] rangeOfString:@"ͬÒâ"].location, [[noteStr string] rangeOfString:@"ͬÒâ"].length);
[noteStr addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:redRangeTwo];

[noteLabel setAttributedText:noteStr];
[noteLabel sizeToFit];
[self.view addSubview:noteLabel];