ios開發動物園管理 繼承多態的實現

標籤：多態   繼承   ios開發   動物園管理系統   foundation架構   

////  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];        //    //忘記引入標頭檔//    Animal * cat =[[Cat alloc]init];//    //    [cat eat];        //    Cat * cat = [[Cat alloc]init];//    //    [cat catchMouse];//    //    Dog * dog = [[Dog alloc]init];//    //    [dog bark];//                //父類指標儲存子類對象，怎樣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，怎樣實現方法的不同性？            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{    //可以動態檢測動物的類型用到的一個類？    if([animal isKindOfClass:[Dog class]])    {        //需要強制類型轉換        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

著作權聲明：本文為博主原創文章，未經博主允許不得轉載。

ios開發動物園管理 繼承多態的實現