JSON feed in UITableView error - ios

Question

I'm trying to get a JSON feed from Instagram to show data in my UITableView. However I get the following error and I can't figure out what the problem is:
2013-08-18 10:20:37.361 ttoauth[38213:c07] -[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x75d7480
2013-08-18 10:20:37.362 ttoauth[38213:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x75d7480'
*** First throw call stack:
(0x13c8012 0x11ede7e 0x14534bd 0x13b7bbc 0x13b794e 0x3f68 0x1ec8fb 0x1ec9cf 0x1d51bb 0x1e5b4b 0x1822dd 0x12016b0 0x26abfc0 0x26a033c 0x26a0150 0x261e0bc 0x261f227 0x261f8e2 0x1390afe 0x1390a3d 0x136e7c2 0x136df44 0x136de1b 0x22c57e3 0x22c5668 0x131ffc 0x2a4d 0x2975)
libc++abi.dylib: terminate called throwing an exception
Here is my code:
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
return [jsonResults count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
CustomCell *cell = (CustomCell *)[self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"CustomCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
NSDictionary *instafeed_tableview = [jsonResults objectAtIndex:indexPath.row];
NSString *username_label = [[instafeed_tableview objectForKey:#"from"] valueForKey:#"username"];
cell.username.text = [NSString stringWithFormat:#"%#", username_label];
cell.username.clipsToBounds = YES;
cell.contentView.clipsToBounds = NO;
return cell;
}
-(NSUInteger)supportedInterfaceOrientations {
return UIInterfaceOrientationMaskPortrait;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
-(CGFloat)tableView :(UITableView *)tableView heightForRowAtIndexPath :(NSIndexPath *)indexPath {
return 191;
}
What am I doing wrong?

Answer 1

reason: '-[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x75d7480
This line tells you that you are using objectAtIndex (NSArray method) to NSDictionary. The error couse becouse what you receive is NSDictionary and you want to use it like NSArray.
Probably your error couse line is:
NSDictionary *instafeed_tableview = [jsonResults objectAtIndex:indexPath.row];
Try to debug it. I think your jsonResults is NSDictionary not NSArray.
Add breakpoint to this line and in output type: po [jsonResults class];.
EDIT based on comment
You got this wrong. This not you who setting what data type do you want from JSON. JSON structure determines that. For example:
[
{ "firstName":"John" , "lastName":"Doe" },
{ "firstName":"Anna" , "lastName":"Smith" },
{ "firstName":"Peter" , "lastName":"Jones" }
]
This example retturns NSArray contains NSDictionaries in it.
{
"name":"John" ,
"surname":"Doe"
},
This will return single NSDictionary
This [] and this {} brackets determines what object are you dealing with.