如何将 NSMutableArray 添加为 NSMutableArray 的 objectAtIndex [英] How to add NSMutableArray as objectAtIndex for NSMutableArray

问题描述

如何将 NSMutableArray 添加为另一个 NSMutableArray

How to add NSMutableArray as an object(i) for another NSMutableArray

我的代码是:

yearImages = [[NSMutableArray alloc]init];
tempImages = [[NSMutableArray alloc]init];

for(int i =0; i< [yearImagesName count]; i++)
{
    for(int j=0; j<[totalImagesName count]; j++)
    {
        if ([[totalImagesName objectAtIndex:j] rangeOfString:[yearImagesName objectAtIndex:i]].location != NSNotFound)
        {
            [tempImages addObject:[totalImagesName objectAtIndex:j]];
        }

    }

    [yearImages addObject:tempImages]; 
    [tempImages removeAllObjects];
}

NSLog(@"\n\n  year%@",[yearImages objectAtIndex:0]); // getting null result

• 这里我需要为 yearImages 添加 tempImages 作为 (i) 的对象..

  • Here i need to add tempImages as object of (i) for yearImages..

    我需要如下结果:

    [yearImages objectAtIndex:i];// result need as arrayobjects here
    

    推荐答案

    在添加 tempImages 后，您将其从 tempImages 中删除，因此结果将是一个空数组数组.您应该添加 tempImages 的副本:[yearImages addObject:tempImages.copy](或 mutableCopy，如果您需要)

    You are removing the objects from tempImages after you add it, so the result will be an array of empty arrays. You should add a copy of tempImages instead: [yearImages addObject:tempImages.copy] (or a mutableCopy if you require that)

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