• iOS 第七期考核题(字符串以及字典的使用 数组内容转换成字符串)


    //1.以下是身份证号,输出身份证人的性别,年龄
          //  NSString *idCard=@210423198809040427;
            //身份证倒数#2位是偶数则为女生
            NSString *idCard=@"210423198809040427";
            int sex1=[[idCard substringWithRange:NSMakeRange(16, 1)] intValue];
            if((sex1%2)==0){
                NSLog(@"性别:女");
            }else{
                NSLog(@"性别:男");
            }
            
            int age1=[[idCard substringWithRange:NSMakeRange(6, 4)] intValue];
            NSDate *date = [NSDate date];//这个是NSDate类型的日期,所要获取的年月日都放在这里;
            NSCalendar *cal = [NSCalendar currentCalendar];
            NSUInteger unitFlags = NSCalendarUnitYear;//这句是说你要获取日期的元素有哪些
            NSDateComponents *d = [cal components:unitFlags fromDate:date];//把要从date中获取的unitFlags标示的日期元素存放在NSDateComponents类型的d里面;
            //然后就可以从d中获取具体的年月日了;
            NSInteger year = [d year];
            NSUInteger age2=year-age1+1;
            NSLog(@"年龄 %ld",age2);
        //2.将字典的key从Z->A排序,按排序后的key的顺序,输出value,将value按字符串输出
            NSDictionary *dict=@{@"R":@"e",
                                 @"T":@"e",
                                 @"D":@"b",
                                 @"S":@"u",
                                 @"K":@"a",
                                 @"A":@"s",
                                 @"O":@" ",
                                 @"N":@"p",
                                 @"B":@"b",
                                 @"J":@"u",
                                 @"F":@" ",
                                 @"U":@"t",
                                 @"H":@"l",
                                 @"E":@"j",
                                 @"Z":@"s",
                                 
                                 };
            //获取所有的key值放在数组内
            NSArray *keys=[dict allKeys];
            //对数组内的key值进行排序(降序)
            NSArray *sortkeys=[keys sortedArrayUsingComparator:^NSComparisonResult(id obj1,id obj2){
                return [obj2 compare: obj1];
            }];
            //根据key值输出value值
            NSMutableArray *mutabarr=[NSMutableArray array];
            for(id key in sortkeys){
                id obj=[dict objectForKey:key];
                //NSLog(@"%@",obj);
                [mutabarr addObject:obj];
            }
         //以字符串的形式输出value值 NSString
    *str=[mutabarr componentsJoinedByString:@""]; NSLog(@"%@",str); }
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  • 原文地址:https://www.cnblogs.com/jiangyicheng/p/5113968.html
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