iOS 委托模式(5)

p> 

p>下面还是贴代码，应该都是很容易看懂的。

p> 

p>MyView.h

p> 

p> 

p> 

p>[cpp] 

p>#import <UIKit/UIKit.h>   

p>  

p>@protocol MyDelegate <NSObject>  

p>  

p>-(void)print:(NSString*)viewName;  

p>  

p>@end  

p>  

p>@interface MyView : UIView  

p>  

p>@property(nonatomic,assign)id<MyDelegate> mydelegate;  

p>  

p>@end  

p> 

p>#import <UIKit/UIKit.h>

p> 

p>@protocol MyDelegate <NSObject>

p> 

p>-(void)print:(NSString*)viewName;

p> 

p>@end

p> 

p>@interface MyView : UIView

p> 

p>@property(nonatomic,assign)id<MyDelegate> mydelegate;

p> 

p>@end

p>MyView.m

p> 

p> 

p> 

p>[cpp] 

p>#import "MyView.h"   

p>  

p>@implementation MyView  

p>  

p>  

p>@synthesize mydelegate = _mydelegate;  

p>  

p>- (id)initWithFrame:(CGRect)frame  

p>{  

p>    self = [super initWithFrame:frame];  

p>    if (self) {  

p>          

p>        //代码创建一个button   

p>        UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];  

p>        [button setTitle:@"Button" forState:UIControlStateNormal];  

p>        [button setFrame:CGRectMake(10, 10, 100, 50)];  

p>        [button setTintColor:[UIColor blueColor]];  

p>          

p>        //Target-Action模式   为button指定事件处理对象target为self，事件处理方法为buttonPressed   

p>        [button addTarget:self action:@selector(buttonPressed) forControlEvents:UIControlEventTouchUpInside];  

p>        [self addSubview:button];  

p>          

p>    }  

p>    return self;  

p>}  

p>//事件处理的响应方法   

p>-(void)buttonPressed{  

p>      

p>    [_mydelegate print:@"this is a view"];  

p>}  

p>  

p>@end  

p> 

p>#import "MyView.h"

p> 

p>@implementation MyView

p> 

p> 

p>@synthesize mydelegate = _mydelegate;

p> 

p>- (id)initWithFrame:(CGRect)frame

p>{

p>    self = [super initWithFrame:frame];

p>    if (self) {

p>        

p>        //代码创建一个button

p>        UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];