objective C underscore property vs self

Question

I\'m was playing around with the standard sample split view that gets created when you select a split view application in Xcode, and after adding a few fields i needed to ad

Answer 1

I'll make an example (without ARC enabled):

@property (nonatomic, retain) NSNumber* number;

If you don't synthesize it, you can access it this way:

self.number= [NSNumber numberWithBool: YES];

This case the number is retained.If instead you synthesize it and don't use the property:

@synthesize number;

Later in the file:

number=[NSNUmber numberWithBool: YES];

You haven't used the property, so the number is not retained.That makes a relevant difference between using accessors and synthesized properties.