Accessing primitive properties from objects stored in a NSDictionary
- by ChrisS
Apologies if this is a basic question, I am just starting with Objective-C and trying to wrap things around in my head!
I have a simple class of the form:
@interface Whatever : NSObject {
int somePrimitive;
SomeObject* someObject;
}
@property (nonatomic) int somePrimitive;
@property (nonatomic, retain) SomeObject* someObject;
The class is more involved that this, but this illustrates the purpose. When I store instances of this class in a NSMutableDictionary:
Whatever *whatever = [[Whatever alloc] init];
whatever.somePrimitive = 1;
whatever.someObject = ...;
[myDictionary setObject:whatever forKey:@"someKey"];
and then try to retrieve the object later:
Whatever *result = [myDictionary valueForKey:@"someKey"];
then,
result.someObject is ok to reference
but,
result.somePrimitive crashes.
Does the NSDictionary not copy over the primitives of the object? Is the rule that the object stored in a dictionary should only contain objects?
