Error accessing generated ivars when I override setters and getters in Modern Objective-C
If you override both the setter and the getter, the compiler will not automatically create the instance variable for you anymore. You can add it to your class implementation like so:
@implementation ClassName { ViewFrameModel *_viewFrameModel;}...@end
Here is the results of some testing I did last year: iOS automatic @synthesize without creating an ivar.
In short, you need to use @synthesize or declare an iVar explicitly.
To summarize the answers:
If you override both the setter and the getter, the compiler will not create the instance variable for you.
Why? In that case, the compiler assumes that the property is dynamic: that it might be a property that relies on other properties for storage / computation, or that it will be created in other ways, for example, at runtime using Objective-C runtime functions.
To help the compiler understand the situation better there are two potential solutions:
@implementation Class@synthesize property = _property;...@endor
@implementation Class { PropertyClass *_property;}...@end