开发中讲字符串中的数字改变颜色

 
    NSString * str =@"您一共购买2件商品，消费总额为：196";
    // 搜索文字
    NSString *tempStr = @"\d{1,}";
    
    NSMutableArray *results = [NSMutableArray array];
    NSRange searchRange = NSMakeRange(0, [str length]);
    NSRange range;
    NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:str];
    while ((range = [str rangeOfString:tempStr options:NSRegularExpressionSearch range:searchRange]).location != NSNotFound)
    {
        [results addObject:[NSValue valueWithRange:range]];
        searchRange = NSMakeRange(NSMaxRange(range), [str length] - NSMaxRange(range));
        [string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:range];
    }
     summary.attributedText = string;

效果如下图：