OC_继承,便利构造器,初始化方法

来源：互联网发布：质量管理体系数据分析编辑：程序博客网时间：2024/05/21 22:29

// main.m

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/16.

#import <Foundation/Foundation.h>

#import "LuZhangZombie.h"

#import "Zombie.h"

#import "TieTongZombie.h"

#import "Person.h"

int main(int argc,constchar * argv[]) {

//继承:子类会继承父类所有的特征和行为

//当对象在执行方法的时候,子类重写了父类的方法,西戎会优先使用子类的方法,如果没有重写,则使用父类的方法.

// Zombie *zombie=[[Zombie alloc] init];

// [zombie walk];

// LuZhangZombie *luZom=[[LuZhangZombie alloc] init];

// [luZom walk];

// [luZom attack];

// [luZom loseEquipment];

// TieTongZombie *tieZom=[[TieTongZombie alloc] init];

// [tieZom walk];

// [tieZom attack];

// [tieZom loseEquipment];

//继承是单向的,一个类只能有一个父类,但是一个类可以有无数个子类

//NSObject是所有类的父亲,也可以称为基类

//类的继承是有传递性的.

// NSLog(@"%@",[zombie class]);

// Zombie *zom=[Zombie alloc];

// zom=[zom init];

// Zombie *zom1=[[Zombie alloc] initWithSetBlood:200 Attack:50 Speed:25];

// [zom1 sayHi];

// LuZhangZombie *luzom=[[LuZhangZombie alloc] initWithSetBlood:100 Attack:10 Speed:5 Equipment:@"路障"];

// [luzom sayHi];

// TieTongZombie *tiezom=[[TieTongZombie alloc] initWithSetBlood:200 Attack:100 Speed:50 Equipment:@"铁桶" Weakness:@"铁通掉了"];

// [tiezom sayHi];

////使用便利构造器创建对象

// Zombie *zom=[Zombie zombieWithBlood:100 Attack:20 Speed:10];

// [zom attack];

////c语言中如果针对空指针进行操作,比如赋值,系统运行到这句代码马上崩溃,而OC遇到空指针会把这句代码当成一句废话,会执行不会有任何结果.

Person *per=[[Person alloc] initWithSetName:@"安逸臣" Sex:@"男" Age:27];

[per sayHi];

Person *per1=[Person personWithName:@"文世倾" Sex:@"男" Age:28];

[per1 sayHi];

[per walk];

[per1 eat];

return0;

}

/////////////////////////Zombie类///////////////////////////

(1)

// Zombie.h

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/16.

#import <Foundation/Foundation.h>

@interface Zombie : NSObject

//特征

{ NSInteger _blood;

NSInteger _attack;

CGFloat _speed;

}

//行为

-(void)sayHi;

-(void)walk;

-(void)attack;

-(void)dead;

//自定义初始化声明(对僵尸特征的初始化)

-(id)initWithSetBlood:(NSInteger)blood

Attack:(NSInteger)attack

Speed:(CGFloat)speed;

////便利构造器.

+(Zombie *)zombieWithBlood:(NSInteger)blood

Attack:(NSInteger)attack

Speed:(CGFloat)speed;

@end

(2)

// Zombie.m

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/16.

#import "Zombie.h"

@implementation Zombie

-(void)sayHi{

NSLog(@"血量:%ld,攻击力:%ld,速度:%g",_blood,_attack,_speed);

}

-(void)walk{

NSLog(@"普通僵尸正在行走");

}

-(void)attack{

NSLog(@"普通僵尸正在攻击");

}

-(void)dead{

NSLog(@"普通僵尸正在死亡");

}

//完整版的初始化方法

-(id)initWithSetBlood:(NSInteger)blood

Attack:(NSInteger)attack

Speed:(CGFloat)speed{

//先调用父类初始化方法,对父类继承过来的成员变量进行设置

self=[super init];

//当这个对象在初始化过程中出现问题,会返回空指针,如果是空指针接下来的赋值就没有一点意义,跳过去,如果返回的是一个正常的堆空间地址,才继续赋值

if (self) {

_blood=blood;

_attack=attack;

_speed=speed;

}

return self;

}

////便利构造器.(创建对象);

//类方法,便利构造器把创建的对象的过程放到了程序里的.m文件中,这样通过类,直接就能创建一个对象出来

//系统类提供了很多便利构造器的方法.

+(Zombie *)zombieWithBlood:(NSInteger)blood

Attack:(NSInteger)attack

Speed:(CGFloat)speed{

Zombie *zombie=[[Zombie alloc] initWithSetBlood:blood Attack:attack Speed:speed];

return zombie;

}

@end

////////////////////LuZhangZombie////////////////////////////////

(1)

// LuZhangZombie.h

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/16.

#import <Foundation/Foundation.h>

#import "Zombie.h"

@interface LuZhangZombie : Zombie

//特征

{

//子类只需要写自己特有的特征就可以,其余的特征都会继承.

NSString *_equipment;

}

//行为

//对方法的重写

//-(void)walk;////此处可以不声明,因为父类已声明过

//-(void)attack;

//-(void)dead;

-(void)sayHi;

-(void)loseEquipment;

-(id)initWithSetBlood:(NSInteger)blood

Attack:(NSInteger)attack

Speed:(CGFloat)speed

Equipment:(NSString *)equipment;

@end

(2)

// LuZhangZombie.m

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/16.

#import "LuZhangZombie.h"

@implementation LuZhangZombie

-(void)sayHi{

NSLog(@"血量:%ld,攻击力:%ld,速度:%g,装备:%@",_blood,_attack,_speed,_equipment);

}

-(void)walk{

///子类重新定义僵尸的方法,否则向上寻找父类方法

NSLog(@"路障僵尸正在走来");

}

-(void)attack{

NSLog(@"路障僵尸正在攻击");

}

-(void)dead{

NSLog(@"路障僵尸正在死亡");

}

-(void)loseEquipment{

_speed=100;

NSLog(@"路障僵尸失去了装备");

}

-(id)initWithSetBlood:(NSInteger)blood

Attack:(NSInteger)attack

Speed:(CGFloat)speed

Equipment:(NSString *)equipment{

//继承父类,先对父类进行赋值

self=[super initWithSetBlood:blood Attack:attack Speed:speed];

if (self) {

_equipment=equipment;

}

return self;

}

@end

/////////////////////////TieTongZombie////////////////////////

(1)

// TieTongZombie.h

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/16.

#import "LuZhangZombie.h"

@interface TieTongZombie : LuZhangZombie

{

NSString *_weakness;

}

-(id)initWithSetBlood:(NSInteger)blood

Attack:(NSInteger)attack

Speed:(CGFloat)speed

Equipment:(NSString *)equipment

Weakness:(NSString *)weakness;

@end

(2)

// TieTongZombie.m

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/16.

#import "TieTongZombie.h"

@implementation TieTongZombie

-(void)sayHi{

NSLog(@"血量:%ld,攻击力:%ld,速度:%g,装备:%@,弱点:%@",_blood,_attack,_speed,_equipment,_weakness);

}

-(void)walk{

[super walk];////super寻找继承过来的方法,并执行该方法,只能执行自己父类,

////方法重新定义,优先执行子类定义,如果子类没有重新定义方法,则向上继承父类定义的方法

NSLog(@"铁桶僵尸正在走来");

}

-(void)attack{

NSLog(@"铁桶僵尸正在攻击");

}

-(void)dead{

NSLog(@"铁桶僵尸正在死亡");

}

-(void)loseEquipment{

NSLog(@"铁桶僵尸失去了装备");

}

-(id)initWithSetBlood:(NSInteger)blood

Attack:(NSInteger)attack

Speed:(CGFloat)speed

Equipment:(NSString *)equipment

Weakness:(NSString *)weakness{

self=[super initWithSetBlood:blood Attack:attack Speed:speed Equipment:equipment];

if (self) {

_weakness=weakness;

}

return self;

}

@end

//////////////////////////person类///////////////////////////////

(1)

// Person.h

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/17.

#import <Foundation/Foundation.h>

@interface Person : NSObject

//三个成员变量

{

NSString *_name;

NSString *_sex;

NSInteger _age;

}

-(void)eat;

-(void)walk;

//sayHi方法

-(void)sayHi;

//设置器

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

-(void)setSex:(NSString *)sex;

-(void)setAge:(NSInteger)age;

//访问器

-(NSString *)name;

-(NSString *)sex;

-(NSInteger)age;

//自定义初始化方法

-(id)initWithSetName:(NSString *)name

Sex:(NSString *)sex

Age:(NSInteger)age;

//便利构造器

+(Person *)personWithName:(NSString *)name////(Person *)或(init);

Sex:(NSString *)sex

Age:(NSInteger)age;

@end

(2)

// Person.m

// OC3_继承,便利构造器,初始化方法

// Created by dllo on 15/7/17.

#import "Person.h"

@implementation Person

-(void)eat{

NSLog(@"吃");

}

-(void)walk{

NSLog(@"行走");

}

//sayHi方法

-(void)sayHi{

NSLog(@"姓名:%@,性别:%@,年龄:%ld",_name,_sex,_age);

}

//设置器

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

_name=name;

}

-(void)setSex:(NSString *)sex{

_sex=sex;

}

-(void)setAge:(NSInteger)age{

_age=age;

}

//访问器

-(NSString *)name{

return _name;

}

-(NSString *)sex{

return _sex;

}

-(NSInteger)age{

return _age;

}

//自定义初始化方法

-(id)initWithSetName:(NSString *)name

Sex:(NSString *)sex

Age:(NSInteger)age{

self=[super init];

if (self) {

_name=name;

_sex=sex;

_age=age;

}

return self;

}

//便利构造器

+(Person *)personWithName:(NSString *)name////(Person *)或(init);

Sex:(NSString *)sex

Age:(NSInteger)age{

Person *per=[[Person alloc] initWithSetName:name Sex:sex Age:age];

return per;

}

@end

0 0