iphone - 初始化 2 个昏暗数组 NSMutableArray

Question

对于 C，我会像这样初始化一个数组:

NSInteger x[3][10];行得通。

下面我有一个有效的单暗数组。想将所有这些移动到一个 2 dim 数组，我该如何初始化它？所以换句话说，采用下面的代码并使其适用于二维。

NSMutableArray *SRData;

SRData = [[NSMutableArray alloc] init];


NSMutableDictionary *SRRow;

SRRow = [[NSMutableDictionary alloc] init];

[SRRow setObject:@"Read" forKey:@"Descr"];
[SRRow setObject:@"Read2.png" forKey:@"Img"];

[SRRow setObject:@"Read the codes" forKey:@"Det"];

[SRData addObject:SRRow] ;   

[SRRow release];

Answer 1

在 Objective-C 中，你只需要有一个数组数组就可以得到第二个维度。据我所知，没有速记法，因此您只能执行以下操作:

NSMutableArray *firstDimension = [[NSMutableArray alloc] init];
for (int i = 0; i < rows; i++)
{
    NSMutableArray *secondDimension = [[NSMutableArray alloc] init];
    [firstDimension addObject:secondDimension];
}

因此，您要做的就是将其他对象(在您的例子中是 NSMutableDictionary)添加到 secondDimension 数组。用法如下:

[[firstDimension objectAtIndex:0] objectAtIndex:0];

---

编辑

完整代码示例:

NSMutableArray *SRData = [[NSMutableArray alloc] init]; //first dimension
NSMutableArray *SRRow = [[NSMutableArray alloc] init]; //second dimension
[SRData addObject:SRRow]; //add row to data
[SRRow release];

NSMutableDictionary *SRField = [[NSMutableDictionary alloc] init]; //an element of the second dimension
[SRField setObject:@"Read" forKey:@"Descr"];
//Set the rest of your objects

[SRRow addObject:SRField]; //Add field to second dimension
[SRField release];

现在，要到达该“字段”，您将使用如下代码:

[[SRData objectAtIndex:0] objectAtIndex:0]; //Get the first element in the first array (the second dimension)