UILabel* noteLabel = [[UILabel alloc] init];

noteLabel.frame = CGRectMake(0, 100, 200, 100);

noteLabel.textColor = [UIColor blackColor];

NSMutableAttributedString *noteStr = [[NSMutableAttributedString alloc] initWithString:@”1111:2222”];

NSRange redRange = NSMakeRange(0, [[noteStr string] rangeOfString:@”:”].location);

[noteStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:redRange];

[noteLabel setAttributedText:noteStr] ;

[noteLabel sizeToFit];

[self.view addSubview:noteLabel];