Question

Could someone please clarify exactly what ARC manages? Ive heard it does not manage c-structs, but i still see people using them. Please tell me which of the varialbes below will be managed by ARC and why.

static CGPoint _var1;
int _var2;

@interface class1:NSObject
    CGPoint _var3;
    CGPoint _var4;
    NSString *_var5;
    NSString *_var6;
}
@property (assign) CGPoint var3;
@property (strong) NSString *var5;
@end

@implentation class1
@synthesize var3 = _var3;
@synthesise var5 = _var5;
@end

Answer 1

ARC manages Objective-C objects automatically. All other types are managed just as they always have been in C.

Note that in your example, there is no allocation associated with the CGPoint instance variables; there memory is effectively allocated inline with the object.