从服务器获取JSON响应

Question

我想从使用JSON的服务器获取响应。我在stackoverflow和其他一些网站上搜索了其他答案。但我没有找到从服务器获得响应的非常简单和最简单的方法。如果有人帮助我做到这一点，它会更好。

Answer 1

如果你只是看我的代码，你可以很容易地理解并得到回应。

//just give your URL instead of my URL 

     NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://api.worldweatheronline.com/free/v1/search.ashx?query=London&num_of_results=3&format=json&key=xkq544hkar4m69qujdgujn7w"]]; 

    [request setHTTPMethod:@"GET"]; 

    [request setValue:@"application/json;charset=UTF-8" forHTTPHeaderField:@"content-type"]; 

    NSError *err; 

    NSURLResponse *response; 

    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err]; 

//You need to check response.Once you get the response copy that and paste in ONLINE JSON VIEWER in GOOGLE.If you do this clearly you can get the correct results.  

//After that it depends upon the json format whether it is DICTIONARY or ARRAY 

    NSDictionary *jsonArray = [NSJSONSerialization JSONObjectWithData:responseData options: NSJSONReadingMutableContainers error: &err]; 

    NSArray *array=[[jsonArray objectForKey:@"search_api"]objectForKey:@"result"];//Just give your your response key of json.Give exact key.Otherwise it wont accept. 

    for(int i=0;i>[array count];i++) 
    { 
     NSString *strTemprature = [NSString stringWithFormat:@"%@",[array objectAtIndex:i]valueForKey:@"temp"]]; 

     NSString *strCity = [NSString stringWithFormat:@"%@",[array objectAtIndex:i]valueForKey:@"city"]]; 
    }