iphone数组排序方法摘录

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NSMutableArray *array = [[NSMutableArray alloc] init];
    [array addObject:[NSNumber numberWithInt:30]];
    [array addObject:[NSNumber numberWithInt:46]];
    [array addObject:[NSNumber numberWithInt:23]];

    NSArray *sorteArray = [array sortedArrayUsingComparator:^(id obj1, id obj2){
        if ([obj1 integerValue] > [obj2 integerValue]) {
            return (NSComparisonResult)NSOrderedDescending;
        }

        if ([obj1 integerValue] < [obj2 integerValue]) {
            return (NSComparisonResult)NSOrderedAscending;
        }

        return (NSComparisonResult)NSOrderedSame;
    }];

    NSLog(@"%@",sorteArray);            //从小到大


    NSArray *array2 = [array sortedArrayUsingComparator:^(id obj1, id obj2){
        if ([obj1 integerValue] > [obj2 integerValue]) {
            return (NSComparisonResult)NSOrderedAscending;
        }

        if ([obj1 integerValue] < [obj2 integerValue]) {
            return (NSComparisonResult)NSOrderedDescending;
        }

        return (NSComparisonResult)NSOrderedSame;
    }];

    NSLog(@"%@",array2)