objective-c - 将 100 个 NSMutableArray 组合成一个可控对象

Question

好吧，我基本上需要找到一种方法来更好地管理 100 个 NSMutableArrays 数据。

就像，(我实际上没有这样做):

NSMutableArray *array1;
NSMutableArray *array2;
NSMutableArray *array3;
//etc..

我需要具有多个方面的东西，例如:

NSMutableCombinationArray *theMassiveArray;

[theMassiveArray addObject:theObject forArray:0 atIndex:0];

最后我想做这样的事情:

//in applicationdidfinishlaunching
loopCount = 0;


- (void) frameTimer:(NSTimer*)timer { //called every second

    startingValue = 0;

    for (int i = 1; i <= 100; i++)
    {
        NSString *dmxValues = [NSString stringWithFormat: @"%@,%@,%@,%@,%@", [DMXChannelArray objectAtIndex:startingValue], [DMXChannelArray objectAtIndex:startingValue+1], [DMXChannelArray objectAtIndex:startingValue+2], [DMXChannelArray objectAtIndex:startingValue+3], [DMXChannelArray objectAtIndex:startingValue+4]];

        [theMassiveArray addObject:dmxValues forArray:i-1 atIndex:loopCount];

        startingValue = startingValue + 5;
    }

    loopCount = loopCount + 1;

}

//NOTE DMXChannelArray is updated in another class with current DMX values from a controller.

所以DMX有512个 channel ，每个阵列需要容纳5个 channel 。这是一款记录应用程序，基本上以每秒一次的分辨率存储 500 个 DMX channel 值。

我该怎么做？最好的方法是什么？我显然想避免编写 100 个 NSMutableArrays 并手动完成这一切。

作为引用，当录制结束时，用户选择要导出的组数(5 个 channel )，然后根据该数量，另一个 for 循环将遍历 NSMutableCombinationArray 并导出最终的数组。

Answer 1

编写一个包装类:

@interface MultiDimensionalMutableArray : NSObject

- (void)insertObject:(id)obj atIndex:(NSUInteger)idx intoArrayAtIndex:(NSUInteger)arrIdx;
- (id)objectAtIndex:(NSUInteger)idx inArrayAtIndex:(NSUInteger)arrIdx;

@end

@implementation MultiDimensionalMutableArray
{
    NSMutableArray * arrays;
}

- (id)init
{
    // init boilerplate

    arrays = [NSMutableArray arrayWithCapacity:100];
    for( int i = 0; i < 100; i++ ){
        [arrays addObject:[NSMutableArray array]];
    }

    return self;
}

- (void)insertObject:(id)obj atIndex:(NSUInteger)idx intoArrayAtIndex:(NSUInteger)arrIdx
{
    //TODO: Include appropriate bounds checking
    NSMutableArray * innerArray = [arrays objectAtIndex:arrIdx];
    [innerArray insertObject:obj atIndex:idx];
}

- (id)objectAtIndex:(NSUInteger)idx inArrayAtIndex:(NSUInteger)arrIdx
{
    return [[arrays objectAtIndex:arrIdx] objectAtIndex:idx];
}

@end