cocos2里如果实现MVP

cocos2d For MVP

cocos2d的强大，这里就不多说了。主要是在开发时，各种代码耦合，不便于维护。所以今天就来个MVP模式，在cocos2d上的实现。

关于MVP模式，就不多解释了，直接上码。

Model 部分

#import <Foundation/Foundation.h>

@protocol IPlayer <NSObject>

- (void)move;

@end

#import "cocos2d.h"
#import "IPlayer.h"

@interface Player : CCSprite<IPlayer>

@end

#import "Player.h"

@implementation Player

- (id)init
{
    if (self = [super init]) {
        
    }
    
    return self;
}

- (void)move
{
    CCMoveTo *move = [CCMoveTo actionWithDuration:3.0f position:ccp(240,160)];
    [self runAction:move];
}

@end

Presenter 部分

#import <Foundation/Foundation.h>
#import "IStartView.h"
#import "IPlayer.h"

@protocol IStartPresenter <NSObject>

- (void)playerMove;

@end

#import <Foundation/Foundation.h>
#import "IStartPresenter.h"

@interface StartPresenter : NSObject<IStartPresenter> {
    
}

@property (nonatomic,assign) id<IStartView>     view;
@property (nonatomic,assign) id<IPlayer>        player;

- (id)initWithView:(id<IStartView>) view Entity:(id<IPlayer>) model;
- (void)playerMove;

@end

#import "StartPresenter.h"

@implementation StartPresenter

@synthesize view = view_;
@synthesize player = player_;

- (id)initWithView:(id<IStartView>) view Entity:(id<IPlayer>) model
{
    if (self = [super init]) {
        view_ = view;
        player_ = model;
    }
    
    return self;
}

- (void)playerMove
{
    [player_ move];
}

@end

最后 View 的部分

#import <Foundation/Foundation.h>

@protocol IStartView <NSObject>

@end

#import "cocos2d.h"
#import "IStartView.h"
#import "IStartPresenter.h"

@interface StartView : CCLayer<IStartView> {
}

@property (nonatomic,assign) id<IStartPresenter>    presenter;


+(CCScene *) scene;

@end

#import "StartView.h"
#import "StartPresenter.h"
#import "Player.h"

@implementation StartView

@synthesize presenter = presenter_;

+(CCScene *) scene
{
    // 'scene' is an autorelease object.
    CCScene *scene = [CCScene node];
    
    // 'layer' is an autorelease object.
    StartView *layer = [StartView node];
    
    // add layer as a child to scene
    [scene addChild: layer];
    
    // return the scene
    return scene;
}

- (id)init
{
    if (self = [super init]) {
        
        Player *player = [[Player alloc] initWithFile:@"Icon-72.png"];
        player.position = ccp(0, 0);
        self.presenter = [[StartPresenter alloc] initWithView:self Entity:player];
        
        [self addChild:player];
        
        CCLabelTTF *label = [CCLabelTTF labelWithString:@"Move" fontName:@"Marker Felt" fontSize:64];
        CCMenuItemLabel *item = [CCMenuItemLabel itemWithLabel:label target:self selector:@selector(move)];
        CCMenu *menu = [CCMenu menuWithItems:item, nil];
        [self addChild:menu];
    }
    return self;
}

- (void)move
{
    [presenter_ playerMove];
}

@end

这样就完成了。运行，点击模拟器屏幕上大大的Move菜单，方块Icon就动起来了。MVP模式让UI和逻辑分开了，但是开发的时候要定义一大坨的接口。

总之没有完美的东西，只有合适的东西，根据需要去取舍。

有空的话再讲讲cocos2d for MVC，这个更抽象，更难理解。