用来自 NSdictionary 的数据初始化 NSArray [英] Initialize NSArray with data from NSdictionary

问题描述

我从 URL 接收数据，将其放入 NSDictionary，然后我需要为每个标签创建 NSArray.我的 NSDictionary 看起来像:

I receiving data from URL, put it in NSDictionary, and then I need to create NSArray for each tags. My NSDictionary looks like:

(
        {
        id =         {
            text = 1;
        };
        logo =         {
            text = "url 1";
        };
        name =         {
            text = "some name 1";
        };
    },
        {
        id =         {
            text = 2;
        };
        logo =         {
            text = "url 2";
        };
        name =         {
            text = "some name 2";
        };
    },
        {
        id =         {
            text = 3;
        };
        logo =         {
            text = "url 3";
        };
        name =         {
            text = "some name 3";
        };
    }   
)

我想要这样的数组:arrLogo = (@"url 1", @"url 2", "url 3").

I want to have array like that: arrLogo = (@"url 1", @"url 2", "url 3").

我接下来要做的是:arrName=[[dict objectForKey:@"name"] valueForKey:@"text"];

但是 Xcode 给了我一个错误:
*** 由于未捕获的异常NSInvalidArgumentException"而终止应用程序，原因:-[__NSArrayM objectForKey:]:无法识别的选择器发送到实例

But Xcode gives me an error:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]: unrecognized selector sent to instance

我试图初始化数组的代码有问题，看起来我的字典由数组组成.如何正确提取数据?

Problem in the code that I'm trying to initialize an arrays, it's look like that my dict consist of arrays. How do I extract the data correctly?

推荐答案

为此，您必须遍历您拥有的 Array 对象.您可以使用快速枚举作为

For this you have to iterate through object of Array that you have. You can use fast enumeration as

    for(object in JsonArray){

    NSString *value = [object valueForKey:@"logo"]valueForKey:@"text"]];

     //Add this value  to your array 
    }
}

希望这会有所帮助.

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