Iterate through array comparing dictionary values - macos

Question

I have a NSMutableArray *dataArray containing NSDictionaries. I want to iterate through the array in order to create a new NSMutableArray *tempDataArray with objects from the first array if the searchString matches one of the dictionaries values.
Here is my code:
self.tempDataArray = [[NSMutableArray alloc] init];
for (int i = 0; i < kDelegate.dataArray.count; i++) {
NSDictionary *dict = [kDelegate.dataArray objectAtIndex:i];
for (int j = 0; j < [dict allValues].count ; j++) {
if ([[[[dict allValues] objectAtIndex:j]stringValue] isEqualToString:searchString]) {
[self.tempDataArray addObject:dict];
}
}
}
Now this doesn't work because the dictionary also contains a NSDate. At least that is what I am reading from the error message:
-[__NSTaggedDate stringValue]: unrecognized selector sent to instance 0x41b7809e2600000d
Which I dont understand, because I do declare all the values as stringValue.
That was the first part of my problem. The second half is that this only searches for an exact match but I would rather have a search determining if the dictionaries values contain a substring.
Anyway, thanks for all your help!

Answer 1

(untested):
self.tempDataArray = [[NSMutableArray alloc] init];
for (NSUInteger i = 0; i < kDelegate.dataArray.count; i++) {
NSDictionary *dict = [kDelegate.dataArray objectAtIndex:i];
NSArray *allValues = [dict allValues];
for (NSUInteger j = 0; j < allValues.count; j++) {
NSObject *obj = [allValues objectAtIndex:j];
if ([obj isKindOfClass:[NSString class]]) {
NSRange range = [(NSString *)obj rangeOfString:searchString];
if (range.location != NSNotFound) {
[self.tempDataArray addObject:dict];
}
}
}
}