From Java To Objective C
My Notes (part 1)
This is a very short introduction from my notes.
A good and complete starting point can be found by google.
I'm a java developer and when I'm going to learn objective-c for the iphone development the matching between the 2 languages became automatic.
Objective C is standard ansi C with object oriented extension.
So many OO arguments found in java can be find in objective C.
In objective C the class usually is split in two file:
- .h file for the class definition.
- .m file for the class implementation.
Let's go to see some code, this is only my simple notes.
.h file example
#import <UI/Class.h> //like import in java
//interface is a compiler directive, it tell that there is a class definiton
//myClassName the className
//NSObject the parent object
//<aProtocol> it respect the protocol definition (like abstract class in java)
@interface MyClassName: NSObject <aProtocol>
int count; //a simple primitive type
id *data; //Weak Type
//String type. *stay for pointer. all the instance object variable
//use this pointer notation
//property declare a class property
//nonatomic or atomic value regard the thread safety in the accessor method
//retain in the set accessor the variable value is retained
@property (nonatomic, retain) NSString aString
//this is a method interface definition