[ACCEPTED]-Using an int as an NSDictionary key?-ios
Accepted answer
If you are using numbers as strings for 6 dictionary keys, you should turn the int into 5 a NSString or NSNumber to use it as a dictionary key. Here's 4 how to do it for a string:
NSString *key = [NSString stringWithFormat:@"%d", myInteger];
As @Hughes BR 3 mentions in a comment, the requirement for 2 the key object is that it must conform to 1 the NSCopying protocol.
I use NSNumbers without problems, but must 4 avoid the usual setObject: forKey: or setValue: forKey: methods. That would 3 create a warning.
No warning, however, is 2 created (and the code works as intended) with
NSMutableDictionary *myDict = [[NSMutableDictionary alloc] init];
NSNumber *key = @1;
id *myObject = [your code here];
myDict[key] = myObject;
Retrieval 1 is straightforward:
myObject = myDict[key];
Source:
stackoverflow.com
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