Question

im new to parsing JSON and im trying a simple task, to retrieve a URL from a forecast weather json file.

Here i parse the json and i NSLog the contents of each component of the data:

NSError *myError = nil;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableLeaves  error:&myError];

NSArray *data =  [res objectForKey:@"data"];
NSLog(@"data=%@",data);

NSArray *results =  [data valueForKey:@"weather"];
NSLog(@"weather=%@",results);

NSArray *results1 =  [results valueForKey:@"tempMaxC"];
NSLog(@"tempMaxC=%@",results1);

NSArray *results2 =  [results1 valueForKey:@"weatherIconUrl"];
NSLog(@"weatherIconUrl=%@",results2);

The problem is that when i get the WeatherIconUrl it comes with this format

"http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png"

and i cant get the url itself without the quotation marks, i tried using nsrange and componentsSeparatedByString but it always gives me this error:

[__NSArrayI componentsSeparatedByString:]: unrecognized selector sent to instance 

JSON from server:

{
    "data": {
        "current_condition": [
            {
                "cloudcover": "0",
                "humidity": "73",
                "observation_time": "12:19 PM",
                "precipMM": "0.0",
                "pressure": "1021",
                "temp_C": "23",
                "temp_F": "73",
                "visibility": "10",
                "weatherCode": "113",
                "weatherDesc": [
                    {
                        "value": "Sunny"
                    }
                ],
                "weatherIconUrl": [
                    {
                        "value": "http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png"
                    }
                ],
                "winddir16Point": "NW",
                "winddirDegree": "320",
                "windspeedKmph": "17",
                "windspeedMiles": "11"
            }
        ],
        "request": [
            {
                "query": "Fanzeres, Portugal",
                "type": "City"
            }
        ],
        "weather": [
            {
                "date": "2012-09-12",
                "precipMM": "0.0",
                "tempMaxC": "28",
                "tempMaxF": "83",
                "tempMinC": "17",
                "tempMinF": "63",
                "weatherCode": "113",
                "weatherDesc": [
                    {
                        "value": "Sunny"
                    }
                ],
                "weatherIconUrl": [
                    {
                        "value": "http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png"
                    }
                ],
                "winddir16Point": "NW",
                "winddirDegree": "312",
                "winddirection": "NW",
                "windspeedKmph": "16",
                "windspeedMiles": "10"
            },
            {
                "date": "2012-09-13",
                "precipMM": "0.0",
                "tempMaxC": "33",
                "tempMaxF": "91",
                "tempMinC": "17",
                "tempMinF": "63",
                "weatherCode": "113",
                "weatherDesc": [
                    {
                        "value": "Sunny"
                    }
                ],
                "weatherIconUrl": [
                    {
                        "value": "http://www.worldweatheronline.com/images/wsymbols01_png_64/wsymbol_0001_sunny.png"
                    }
                ],
                "winddir16Point": "N",
                "winddirDegree": "8",
                "winddirection": "N",
                "windspeedKmph": "10",
                "windspeedMiles": "6"
            }
        ]
    }
}

Sorry for my bad english and please correct me if im doing this wrong, thanks in advance

Answer 1

If you truly have quotes surrounding your URL, then try something like this:

NSString *someURLString = [results2 objectAtIndex:0];
NSString *quotesRemoved = [someURLString stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"\""]];