有没有办法重复数组中NSDictionaries的数量？ [英] Is there a way to duplicate the number of NSDictionaries in an array?

问题描述

我目前在表视图中有这个 NSDictionary s数组，但是当表视图向下滚动时，我需要复制该数组中的字典数。有没有办法实现这一目标，并且还指定或知道词典名称是什么？

I currently have this array of NSDictionarys in my table view, but I need to duplicate the number of dictionaries in the array as the table view scrolls down. Is there a way to achieve this, and also specify or know what the dictionary names will be?

NSMutableDictionary *d0 = [[NSMutableDictionary alloc] init];

NSMutableDictionary *d1 = [[NSMutableDictionary alloc] init];

NSMutableDictionary *d2 = [[NSMutableDictionary alloc] init];

NSMutableDictionary *d3 = [[NSMutableDictionary alloc] init];

NSMutableDictionary *d4 = [[NSMutableDictionary alloc] init];


objects = [NSMutableArray arrayWithObjects:d0, d1, d2, d3, d4, nil];

推荐答案

首先，它的接缝易于创建循环中的字典：

First of all, it seams to be easier to create the dictionaries in a loop:

NSMutableArray *objects = [NSMutableArray new];
for( int i = 0; i < 5; i++ )
{
   [objects addObject:[NSMutableDictionary new]];
}

如果您要复制字典，可以使用循环也是如此：

If you want to "duplicate" the dictionaries, you can do that with a loop, too:

for( NSMutableDictionary *dictionary in [objects copy])
{
  [objects addObject:[dictionary mutableCopy]];
}

但是我无法摆脱这种感觉，即您的整体方法是错误的。其背后的想法是什么？

But I cannot get rid of the feeling that your whole approach is wrong. What is the idea behind that?

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