UITableView NSMutableArray and NSDictionary - uitableview

Question

I’ve got this error when populating a tableview from an nsmutablearray.
The arrays are added to the dictionary and the dictionary added to the mutable array, but the app crashes each time the view is loaded with error:
[__NSArrayI isEqualToString:]: unrecognized selector sent to instance
0x8a87e60 2014-05-24 12:23:02.589 jwStudy[77652:907] * Terminating
app due to uncaught exception 'NSInvalidArgumentException', reason:
'-[__NSArrayI isEqualToString:]: unrecognized selector sent to
instance 0x8a87e60'
The log output confirms that the arrays and keys are added correctly.
But why does the cell in the cellForRowAtIndexPath: method throw an error?
Here’s the code:
- (void)viewDidLoad
{
[super viewDidLoad];
languageArray = [[NSMutableArray alloc] init];
languages = [[NSArray alloc] initWithObjects:#"Abbey", #"Abkhasisk", #"Abua", nil];
downloadURL = [[NSArray alloc] initWithObjects:#"http://download.jw.org/files/content_assets/bb/502013341_ABB_cnt_1_r480P.mp4",
#"http://download.jw.org/files/content_assets/3c/502013341_ABK_cnt_1_r480P.mp4",
#"http://download.jw.org/files/content_assets/7e/502013341_AU_cnt_1_r720P.mp4", nil];
mutedict = [NSDictionary dictionaryWithObjectsAndKeys:languages, #"FirstKey", downloadURL, #"SecondKey", nil];
[languageArray addObject:mutedict];
NSLog(#"%#",languageArray);
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return languageArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *simpleTableIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
// ERROR HERE!!!
cell.textLabel.text = [[languageArray objectAtIndex:indexPath.row] objectForKey:#"FirstKey”];
if ([checkCellLanguage isEqual:indexPath]) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}

Answer 1

#Farhan and Joy.
Thank you both for prompt reply. I have realized now that I wasn't clear enough in my question. What I wanted was for each selected row in the tableview to register the row's corresponding URL. So I ended up abandoning the arrays and dictionaries ... too confusing. And going with 2 NSArrays instead. This link got me going on the right track and everything works now:
http://sweettutos.com/2012/08/25/loading-urls-from-uitableview/

Answer 2

In your code, two arrays stored in a dictionary , and the dictionary stored in a array.
Like this :
languageArray ----- mutedict ------ languages (FirstKey)
|
|
----------- downloadURL(SecondKey)
cell.textLabel.text is a NSString, but [[languageArray objectAtIndex:indexPath.row] objectForKey:#"FirstKey”]; is NSArray
So your code throw an error.
If your want put a language as cell.textLabel.text
You could modify your code as cell.textLabel.text = [[mutedict objectForKey:#"FirstKey"] objectAtIndex:indexPath.row]
Hope it can help you :)