iOS 委托模式(3)

p>        [customer willBuy];  

p>    }  

p>    return 0;  

p>}  

p> 

p>#import <Foundation/Foundation.h>

p> 

p>#import "Customer.h"

p>#import "Businessman.h"

p> 

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

p>{

p> 

p>    @autoreleasepool {

p>        

p>        // insert code here...

p>        Customer *customer = [[Customer alloc]init];        

p>        Businessman *businessman = [[Businessman alloc]init];

p>        customer.delegate = businessman;

p>        [customer willBuy];

p>    }

p>    return 0;

p>}

p>二、通过委托传事件 

p> 

p>下面也是简单说一下这个例子：

p> 

p>委托类：Boss

p> 他要处理起草文件和接电话的任务，但是他本身并不实现这些事件响应的方法，而是通过委托让他的被委托类来实现这些响应方法。

p> 

p>被委托类：Secretary

p> 他受Boss的委托实现起草文件和接电话任务的方法。

p> 

p>下面贴代码：

p> 

p>Boss.h

p> 

p> 

p> 

p>[cpp] 

p>#import <Foundation/Foundation.h>   

p>  

p>@protocol MissionDelegate <NSObject>  

p>  

p>-(void)draftDocuments;  

p>  

p>-(void)tellPhone;  

p>  

p>@end  

p>  

p>@interface Boss : NSObject  

p>  

p>@property(nonatomic, assign)id<MissionDelegate> delegate;  

p>  

p>-(void)manage;  

p>  

p>@end  

p> 

p>#import <Foundation/Foundation.h>

p> 

p>@protocol MissionDelegate <NSObject>

p> 

p>-(void)draftDocuments;

p> 

p>-(void)tellPhone;

p> 

p>@end

p> 

p>@interface Boss : NSObject

p> 

p>@property(nonatomic, assign)id<MissionDelegate> delegate;

p> 

p>-(void)manage;

p> 

p>@end

p>Boss.m

p> 

p> 

p> 

p>[cpp] 

p>#import "Boss.h"   

p>  

p>@implementation Boss  

p>  

p>@synthesize delegate = _delegate;  

p>  

p>-(void)manage {  

p>    [_delegate draftDocuments];  

p>    [_delegate tellPhone];  

p>}  

p>@end  

p> 

p>#import "Boss.h"

p> 

p>@implementation Boss

p> 

p>@synthesize delegate = _delegate;

p> 

p>-(void)manage {

p>    [_delegate draftDocuments];

p>    [_delegate tellPhone];

p>}

p>@end

p>Secretary.h

p> 

p> 

p>[cpp]

p>#import <Foundation/Foundation.h>