Instancetype and id

Source: Internet
Author: User

Instancetype and id

1. Similarities

Can be used as the return type of the method.

2. Differences

  • Instancetype can return objects of the same type as the class of the method. id can only return unknown objects;
  • Instancetype can only be used as a return value and cannot be used as a parameter as an id, for example, the following statement:
-(Void) setName :( instancetype) name {// do something}

The above is incorrect.

This should be the case.

-(Void) setName :( id) name {// do something}

 

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