Self in OC. The difference from the underline

@property (nonatomic, copy) NSString *name;

Self.name is the access to the property that is called in a getter method that will let reference counter +1; _name but not.

_name is the access reference count for local variables does not increase or decrease

Using Self.name is a better choice because it is compatible with lazy loading, but also avoids the use of underscores when ignoring the self pointer, _name easy to create circular references in the block.

Self in OC. The difference from the underline