Can't use method on an instance variable

Question

Why doesn't testVariableValues have the method dictionaryWithObjectsAndKeys?

@property (nonatomic, strong) NSDictionary *testVariableValues;

I'm trying to use the method like so:

[self.testVariableValues dictionaryWithObjectsAndKeys:......]

The only method available is [self.testVariableValues dictionaryWithValuesForKeys...

I'm new to Objective C and don't have much of an idea about the problem. Something to do with instance methods?

Answer 1

You're mixing up class methods and instance methods.

You need to call

 self.testVariableValues = [NSDictionary dictionaryWithObjectsAndKeys:obj1, @"key1"..., nil].

Hope that helps.