[Reading Notes] iOS-memory release and ios-memory release

[Reading Notes] iOS-memory release and ios-memory release

1. Some programmers prefer to organize the code for memory cleanup in a centralized place in the function, while others prefer to release objects automatically at the creation point to avoid forgetting to release these objects in the future. Both methods are valid.

2. The id type indicates a pointer to any type of object, which is a generic object type. You can assign any object to an id variable or assign an id variable to an object pointer of any type. If a protocol name enclosed in angle brackets follows the id, the compiler will notify you of any type of object as long as it complies with the protocol.

3. Define a formal protocol by listing a set of method names in the @ protocol section. You can use this Protocol to list the Protocol names enclosed by Angle brackets after the class names in the @ interface declaration. When an object adopts a formal protocol, it promises to implement each of the requirements listed in the Protocol. If you do not implement all the methods in the protocol, the compiler will warn you to help you fulfill your promise.

 

References: Objective-C basic tutorial