iOS排序

NSArray *originalArray = @[@,@,@,@,@];
    //block比较方法，数组中可以是NSInteger，NSString（需要转换）
    NSComparator finderSort = ^(id string1,id string2){

        if ([string1 integerValue] > [string2 integerValue]) {
            return (NSComparisonResult)NSOrderedDescending;
        }else if ([string1 integerValue] < [string2 integerValue]){
            return (NSComparisonResult)NSOrderedAscending;
        }
        else
            return (NSComparisonResult)NSOrderedSame;
    };

    //数组排序：
    NSArray *resultArray = [originalArray sortedArrayUsingComparator:finderSort];
    NSInteger i = resultArray.count - ;
    NSLog(@"排序结果：%@",resultArray);
    NSLog(@"排序结果最大：%@",resultArray[i]);
    NSLog(@"排序结果最小：%@",resultArray[]);