Li Hongqiang iOS Development oc[018] The relationship between objects and methods

//

Main.m

- the relationship between objects and methods

//

Created by Vic fan on 16/7/14.

copyright©2016 year Li Hongqiang . All rights reserved.

//

/**

*

OC has a method of having a parameter return value

declaration with parameter return value method

-(int) sum: (int) x AndY: (int) y;

-(int) sum: (int) x AndY: (int) y{

return x+y;

relationship :

1 object as the parameter of the method ;

ways to display people's information

-(void) Showperson: (person *) person;

2 object as the return value of the method

denaturing Methods

-(Person *) Changesex: [person *] person;

*

*/

#import <Foundation/Foundation.h>

/**

* Declaration of Class

*/

/**

Define Gender enumeration

*/

typedef enum{

//0 1 2

Ksexwomen,ksexman,ksexyao

}sex;

@interface person : nsobject{

@public

nsstring *_name; name

int _age; Age

Sex _sex; sex

}

/**

* declaration of Methods

*/

-(void) Showperson: (person *) person;

-(person *) Changesex: [person *] person;

@end

@implementation Person

-(void) Showperson: (person *) person{

NSLog(@ " name :%@, age :%d, gender :%d",person->_name,person-> _age,person->_sex);

}

-(person *) Changesex: (person *) person{

person->_sex = ksexwomen;

return person ;

}

@end

int Main (int argc, const Char * argv[]) {

@autoreleasepool {

/**

* Create Objects

*/

person *p = [person new];

/**

* assigning value to an instance variable of an object

*/

p->_age = ;

p->_name = @ " Jay Chou ";

p->_sex = Ksexman;

/**

* Call Method

*/

[P Showperson:p];

NSLog(@ " sex :%d",p->_sex);

person *p2 = [P changesex:p];

NSLog(@ " sex :%d",p2->_sex);

}

return 0;

}

Li Hongqiang iOS Development oc[018] The relationship between objects and methods