OBJECTIVE-C Introductory Study (i)

The 1.BOOL type is actually a # define Yes 1 #define NO 0 so it's actually an integral type

2. The naming conventions for instance variables are underlined, such as _name

3. Method of declaring an object in an. h file:-(BOOL) method name 1: (NSString *) Parameter name 1 Method Name 2: (nsinteger) Parameter name 2

4. #pragma mark notes in Xcode This method enables you to see the information of the annotation

5. In OC, Stu.age is not an attribute similar to accessing member variables in Java. Stu.age = 10 in OC is equivalent to [Stu Setage:10]. This is used in the set and get methods.

6.alloc is a class method, and Init is an instance method.

OBJECTIVE-C Introductory Study (i)