Not able to fetch JSON data in iOS

Question

I will post my code here:

NSString *string=[NSString stringWithFormat:@"https://api.fda.gov/drug/event.json?limit=25"];

NSLog(@"string:%@",string);

NSURL *url=[NSURL URLWithString:string];

NSLog(@"url %@",url);

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
 NSData *data=[NSData dataWithContentsOfURL:url];

    NSLog(@"data:%@",data);

    [self performSelectorOnMainThread:@selector(fetcheddata:) withObject:data waitUntilDone:YES];
});

-(void)fetcheddata:(NSData *){}

The above code worked for me earlier. I don't know what happened it's not working now. When I pasted the URL in the browser it is working. Please guide me in this case. It shows me data parameter is nil and exception is NSInvalidArgumentException.

Your code works for me, I always get data after like 3 seconds. — gabbler
I created new project and wrote the code again in viewdidload but still it doesn't work for me. I am using Xcode 6 iOS8. — Pra Do

Hussain Shabbir Hussain Shabbir · Accepted Answer · 2014-10-03T16:06:10

Change the below line

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

with

dispatch_sync(dispatch_get_main_queue(), ^{

Not able to fetch JSON data in iOS

1 Answers