iOS Learning Notes

• Problems

1. @interface @end and @implementation @end cannot be nested with
2. Only the declaration of the class has no implementation of the class
3. Missing Write @end
4. Declaration nesting of two classes (can be scrambled in order)
5. Member variable not written in {}
6. The declaration of the method is written in {}.
7. Method cannot be called like a function
8. Member variables and methods cannot be modified with keywords such as static, not confused with C language
9. The implementation of the class can be written behind the Mian function and can be used as long as there is a declaration

iOS Learning Notes