Unable to read data after NSJSONSerialization - ios

Question

I am getting a json array from the server. The jsonOutput object shows 2 objects correctly. But am unable to display or extract the data. Could some one help me out. I tried
the following way :
for (id key in jsonOutput) {
NSLog(#"key: %#, value: %#", key, [jsonOutput objectForKey:key]);
}
declaration :
NSDictionary *jsonOutput;
actualmethods :
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
data=[[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)theData
{
[data appendData:theData];
// if ([connection isEquals:connect1]){
// this is request urlConnectionRecsender
// }
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
jsonOutput= [NSJSONSerialization JSONObjectWithData:data options:nil error:nil];
for (id key in jsonOutput) {
NSLog(#"key: %#, value: %#", key, [jsonOutput objectForKey:key]);
}
}

Answer 1

Try this
NSError *error;
jsonOutput= [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if(error)
NSLog(#"%#",error.description);
If you don't know what is response type, then it is always a good practice to check respone type first
id responseObj = [NSJSONSerialization
JSONObjectWithData:data
options:kNilOptions
error:&error];
if ([responseObj isKindOfClass:[NSArray class]]) {
//Your response is a array
}
else if([responseObj isKindOfClass:[NSDictionary class]]) {
//Your response is a dictionary
}
Your array contains NSDictionary
{ cropName = corn; cropOrderId = 1; cropPrice = 100; "farmer_id" = 1; orderStatus = pending; quantity = 5; }
use this code to get value
for(NSDictionary*dict in jsonObject) {
NSArray *allKeysarr = [dic allKeys];
for(NSString *key in allKeysarr) {
NSLog(#"%#",[dic valueForKey:key]);
}
}

Answer 2

first use error handling:
NSError *error;
jsonOutput= [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if (error) NSLog(#"error: %#",error.description);
then access values with:
NSString *value1 = [jsonOutput objectForKey:#"YOUR_KEY1"];

Answer 3

NSData *xmlData = [NSData dataWithContentsOfFile:xmlPath];
NSError *jsonError = nil;
id jsonObject = [NSJSONSerialization JSONObjectWithData:xmlData options:kNilOptions error:&jsonError];
if ([jsonObject isKindOfClass:[NSArray class]]) {
NSLog(#"its an array!");
NSArray *jsonArray = (NSArray *)jsonObject;
NSLog(#"jsonArray - %#",jsonArray);
}
else {
NSLog(#"its probably a dictionary");
NSDictionary *jsonDictionary = (NSDictionary *)jsonObject;
NSLog(#"jsonDictionary - %#",jsonDictionary);
}
Try this once