ios開發之-繼承的實現運用

//
//  main.m
//  繼承
////#import <Foundation/Foundation.h>
#import "Animal.h"
#import "Cat.h"
#import "Dog.h"
#import "FeedMan.h"int main(int argc, const char * argv[])
{//    Animal * animal = [Animal new];
//    
//    [animal eat];
//    
//    [animal sleep];//    //忘記引入頭文件
//    Animal * cat =[[Cat alloc]init];
//    
//    [cat eat];//    Cat * cat = [[Cat alloc]init];
//    
//    [cat catchMouse];
//    
//    Dog * dog = [[Dog alloc]init];
//    
//    [dog bark];
//    //父類指針保存子類對象。如何調用子類對象的方法？//    Animal * animal_cat = [[Cat alloc]init];
//    
//    FeedMan * man = [[FeedMan alloc]init];
//    
//    [man showName:animal_cat];//[animal_cat eat];//    [animal_cat setName:@"Hello Cat"];Animal * animal_dog = [[Dog alloc]init];FeedMan * man = [[FeedMan alloc]init];[man showName:animal_dog];[man FeedAnimal:animal_dog];//子類調用父類的方法，如何實現方法的不同性？return 0;
}

//
//  FeedMan.h
//  繼承
//#import "Animal.h"@interface FeedMan : NSObject-(void)showName:(Animal *)animal;-(void)FeedAnimal:(Animal *)animal;
@end

//
//  FeedMan.m
//  繼承#import "FeedMan.h"
#import "Dog.h"
#import "Cat.h"@implementation FeedMan-(void)FeedAnimal:(Animal *)animal
{if ([animal isKindOfClass:[Dog class]] ) {Dog * dog = (Dog *)animal;[dog eat];}
}-(void)showName:(Animal *)animal
{//能夠動態的檢測動物的類型用到的一個類？if([animal isKindOfClass:[Dog class]]){//須要強制類型轉換Dog * dog = (Dog *)animal;[dog bark];}else if ([animal isKindOfClass:[Cat class]]){Cat * cat = (Cat *)animal;[cat catchMouse];}}@end

//
//  Animal.h
//  繼承#import <Foundation/Foundation.h>@interface Animal : NSObject
{NSString * _name;int _age;
}@property NSString * name;
@property int age;-(void)eat;-(void)sleep;-(void)showAge;@end

//
//  Animal.m
//  繼承
//#import "Animal.h"@implementation Animal-(void)eat
{NSLog(@"動物吃東西");
}-(void)sleep
{NSLog(@"動物睡覺了");
}-(void)showAge
{NSLog(@"小動物的年齡");
}
@end

//
//  Dog.h
//  繼承
//#import "Animal.h"@interface Dog : Animal
{}-(void)bark;
-(void)eat;@end

//
//  Dog.m
//  繼承
//#import "Dog.h"@implementation Dog-(void)bark
{NSLog(@"小狗汪汪叫");
}
-(void)eat
{NSLog(@"小狗吃東西");
}@end

//
//  Cat.h
//  繼承#import "Animal.h"@interface Cat : Animal
{}
-(void)catchMouse;-(void)eat;
@end

//
//  Cat.m
//  繼承
//#import "Cat.h"@implementation Cat
{}-(void)catchMouse
{NSLog(@"貓咪會捉老鼠！

"); } -(void)eat { NSLog(@"小貓吃小魚"); } @end