Common memory Issues in iOS

An retain or copy-modified property in iOS will override the Dealloc method and release the attribute in Dealloc.  This is because when we use self. The attribute's reference count is added by 1. If you do not use self. Instead of overriding the Dealloc method, you do not have to override the "_" attribute because "_" does not have a reference count of the property plus 1. All in all, as long as you use self in iOS development. You must override the Dealloc method if you use "_" to rewrite the dealloc, otherwise there will be excessive release to trigger the program crash.

Common memory Issues in iOS