类的组合使用

#import <Foundation/Foundation.h>

#import "Father.h"

#import "Mother.h"

#import "Son.h"

@interface Family : NSObject{

    //father

    Father *_father;

    //mother

    Mother *_mother;

    //son

    Son *_son;

}

- (instancetype)initWithFather:(Father *)father mother:(Mother *)mother son:(Son *)son;

- (void) setFather : (Father *)father;

- (void)setMother:(Mother *)mother;

- (void)setSon :(Son *)son;

- (Father *) father;

- (Mother *)mother;

- (Son *)son;

@end

#import "Family.h"

@implementation Family

- (instancetype)initWithFather:(Father *)father mother:(Mother *)mother son:(Son *)son{

    _father = father;

    _mother = mother;

    _son = son;   

    return self;

}

- (void) setFather : (Father *)father{

    _father = father;

}

- (void)setMother:(Mother *)mother{

    _mother = mother;

}

- (void)setSon :(Son *)son{

    _son = son;

}

- (Father *) father{

    return _father;

}

- (Mother *)mother{

    return _mother;

}

- (Son *)son{

    return _son;

}

@end

#import <Foundation/Foundation.h>

@interface Son : NSObject{

        NSString *_name;

        NSInteger _age;

       }

    //初始化方法

    - (instancetype) initWithName:(NSString *)name age:(NSInteger)age;

    //getter

    - (NSString *)name;

    - (void)setName:(NSString *)name;

    - (NSInteger)age;

    - (void)setAge:(NSInteger)age;

@end

#import "Son.h"

@implementation Son

- (instancetype) initWithName:(NSString *)name age:(NSInteger)age{

    _name = name;

    _age = age;

    return self;

}

- (NSString *)name{

    return  _name;

}

- (void)setName:(NSString *)name{

    _name = name;

}

- (NSInteger)age{

    return _age;

}

- (void)setAge:(NSInteger)age{

    _age = age;

}

@end

#import <Foundation/Foundation.h>

@interface Father : NSObject{

    NSString *_name;

}

- (instancetype)initWithName:(NSString *)name;

- (NSString *)name;

- (void) setName :(NSString *)name;

@end

#import "Father.h"

@implementation Father

- (instancetype)initWithName:(NSString *)name{

    _name = name;

    return self;

}

- (NSString *)name{

    return _name;

}

- (void) setName :(NSString *)name{

    _name = name;

}

@end

#import <Foundation/Foundation.h>

@interface Mother : NSObject{

    NSString *_name;

}

- (instancetype) initWithName :(NSString *)name;

- (NSString *)name;

- (void) setName:(NSString *)name;

@end

#import "Mother.h"

@implementation Mother

- (instancetype) initWithName :(NSString *)name{

    _name = name;

    return self;

}

- (NSString *)name{

    return _name;

}

- (void) setName:(NSString *)name{

    _name = name;

}

@end

#import <Foundation/Foundation.h>

#import "Son.h"

#import "Family.h"

#import "Father.h"

#import "Mother.h"

int main(int argc, const char * argv[])

{

    @autoreleasepool {

        Son *s = [[Son alloc]initWithName:@"六娃" age:19];

        Father *f = [[Father alloc]initWithName:@"小金刚"];

        Mother *m = [[Mother alloc]initWithName:@"女王大人"];

        Family *family = [[Family alloc]initWithFather:f mother:m son:s];

//        //第一种方式

//        //getter方法

//        Son *s1 = [family son];

//        NSLog(@"%@",s1.name);

        //第二种方式

        NSLog(@"%@",[[family son]name]);//2015-04-14 16:50:01.489 OCLesson2_类的组合使用[2215:127250] 六娃

        NSLog(@"%ld",[[family son]age]);//2015-04-14 16:50:01.490 OCLesson2_类的组合使用[2215:127250] 19

        NSLog(@"%@",[[family father]name]);//2015-04-14 16:50:01.490 OCLesson2_类的组合使用[2215:127250] 小金刚

        NSLog(@"%@",[[family mother]name]);//2015-04-14 16:50:01.490 OCLesson2_类的组合使用[2215:127250] 女王大人

        //第三种方式

        //点语法 可以自动识别getter和setter方法

        //getter

        NSLog(@"%@",s.name);

        //setter

        s.name = @"七娃";

        //getter

        NSLog(@"%@",s.name);

        //getter

        NSLog(@"%@",family.son.name);

        //getter

        NSLog(@"%ld",family.son.age);

        //getter

        NSLog(@"%@",family.father.name);

        //getter

        NSLog(@"%@",family.mother.name);

    }

    return 0;

}