[英]Initialize NSArray with data from NSdictionary
I receiving data from URL, put it in NSDictionary, and then I need to create NSArray for each tags. 我从URL接收数据,将其放在NSDictionary中,然后我需要为每个标签创建NSArray。 My NSDictionary looks like:
我的NSDictionary看起来像:
(
{
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";
};
}
)
I want to have array like that: arrLogo = (@"url 1", @"url 2", "url 3"). 我希望有这样的数组:arrLogo =(@“url 1”,@“url 2”,“url 3”)。
I'm doing next: arrName=[[dict objectForKey:@"name"] valueForKey:@"text"];
我正在做下一个:
arrName=[[dict objectForKey:@"name"] valueForKey:@"text"];
But Xcode gives me an error: 但是Xcode给了我一个错误:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]: unrecognized selector sent to instance
Problem in the code that I'm trying to initialize an arrays, it's look like that my dict consist of arrays. 在我试图初始化数组的代码中的问题,看起来我的dict由数组组成。 How do I extract the data correctly?
如何正确提取数据?
For this you have to iterate through object of Array that you have. 为此,您必须遍历您拥有的Array对象。 You can use fast enumeration as
您可以使用快速枚举
for(object in JsonArray){
NSString *value = [object valueForKey:@"logo"]valueForKey:@"text"]];
//Add this value to your array
}
}
Hope this helps. 希望这可以帮助。
The JSONResponse you have get is NSArray
not NSDictionary
你得到的JSONResponse是
NSArray
而不是NSDictionary
You can parse you json response like this ... 你可以像这样解析你的json响应......
NSMutableArray * tmpAry = your json response;
NSMutableArray * urlAry = [[NSMutableArray alloc] init];
for (int i=0; i<tmpAry.count; i++) {
NSMutableDictionary * tmpDictn = [tmpAry objectAtIndex:i];
[urlAry addObject:[[tmpDictn objectForKey:@"logo"] valueForKey:@"text"]];
}
NSLog(@"urlAry : %@",urlAry);
Log will display : 日志将显示:
urlAry : (
url 1,
url 2,
url 3
)
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