给UILabel设置不同的字体和颜色

NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"Using NSAttributed String，try your best to test attributed string text"];

[str addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(0,5)];

[str addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(6,12)];

[str addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(19,6)];

[str addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Arial" size:30.0] range:NSMakeRange(0, 5)];

[str addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Arial" size:30.0] range:NSMakeRange(6, 12)];

[str addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Arial" size:30.0] range:NSMakeRange(19, 6)];

UILabel *attrLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 150, 320 - 40, 90)];

attrLabel.attributedText = str;

attrLabel.numberOfLines = 0;

[self.view addSubview:attrLabel];

NSString *keyword = @"开源";
NSString *result = @"开源中国社区";

// 设置标签文字
NSMutableAttributedString *attrituteString = [[NSMutableAttributedString alloc] initWithString:result];

// 获取标红的位置和长度
NSRange range = [result rangeOfString:keyword];

// 设置标签文字的属性
[attrituteString setAttributes:@{NSForegroundColorAttributeName : [UIColor redColor], NSFontAttributeName : [UIFont systemFontOfSize:17]} range:range];

// 显示在Label上
label.attributedText = attrituteString;