NSDictionary not looping through correctly - ios

Question

I have an NSDictionary created by the AFNetworking class, but now I want to convert that NSDictionary into an array of objects of a class that I made. I have tried using the for-in loop as follows:
for (NSDictionary *item in results)
[_masterList addObject:[[MyObject alloc]initWithType:[item objectForKey:#"type"];
results by the way is my NSDictionary. There are no syntax errors, but when I run my program, nothing comes up. I tried NSLog-ing in the for-in, but didn't get anything, which means that the loop does not even run once. I'm pretty sure the NSDictionary is full, because I NSLoged the result during the AFNetworking process, and it was full:
(
{
address = "Sample Address";
}
)
Anyone have any ideas that I could use? Please express in the comments if I should add any more code. Thanks!

Answer 1

There are no key type, change it to address
for (NSDictionary *item in results)
[_masterList addObject:[[MyObject alloc]initWithType:[item objectForKey:#"address"];

Answer 2

results is a NSDictionary or a NSArray of dictionaries? If it is NSDictionary then you must loop like this:
// loop through each key in dictionary
// let say your key type is NSString
for (NSString* key in results) {
// access your object for key here
NSLog(#"%#", results[key]);
}

Answer 3

Not much of an answer but too big for a comment: you've made a mistake other than in the code presented. Try:
NSArray *results = #[
#{
#"address": #"Sample Address"
}
];
NSLog(#"%#", results);
for (NSDictionary *item in results)
NSLog(#"%# (%#)", item, [item objectForKey:#"address"]);
Output is:
2015-11-10 23:20:22.713 Untitled[1564:1904151] (
{
address = "Sample Address";
}
)
2015-11-10 23:20:22.715 Untitled[1564:1904151] {
address = "Sample Address";
} (Sample Address)
So, definitely the same dictionary, then the same iteration code, with correct results.
Addendum, which may or may not be helpful: one of the things Apple supplies to take advantage of Objective-C's reflective runtime is key-value coding which, assuming your properties obey certain rules, allows them to be written to by name. If you had a dictionary you wanted to commute to an object, and had performed suitable validation, then you might:
NSDictionary *inputDictionary = ... whatever ...
SomeObject *target = [[SomeObject alloc] init];
for (NSString *key in inputDictionary)
[target setValue:inputDictionary[key] forKey:key];
In contrast to Objective-C norms but consistently with most modern languages, that'll raise an exception if the key doesn't exist as a property on target. So in production code you probably want at least a try/catch block if the dictionary is coming from afar.