1、传入字符串数组，通过NSMutableAttributedString修改匹配文字

可以根据需要搞成匹配单个字符串

- (NSAttributedString *)applyFontSizeToText:(NSString *)text matchStrings:(NSArray<NSString *> *)matchStrings {NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:text];UIFont *font = [UIFont systemFontOfSize:16]; // 目标字体大小for (NSString *match in matchStrings) {NSRange searchRange = NSMakeRange(0, text.length);NSRange foundRange;while (searchRange.location < text.length &&(foundRange = [text rangeOfString:match options:NSCaseInsensitiveSearch range:searchRange]).location != NSNotFound) {[attributedString addAttribute:NSFontAttributeName value:font range:foundRange];[attributedString addAttribute:NSForegroundColorAttributeName value:HexColor(@"#9B9B9B") range:foundRange];// 更新搜索范围，避免死循环searchRange = NSMakeRange(NSMaxRange(foundRange), text.length - NSMaxRange(foundRange));}}return attributedString;
}

调用方法：

NSArray *matchArray = @[@"次/分钟", @"次", @"mmhg", @"小时", @"分钟"];
if (dataString.length != 0) {//避免空字符串self.dataLabel.attributedText = [self applyFontSizeToText:self.dataLabel.text matchStrings:matchArray];
}