cocos2d 研究第一天（菜单）

一直很忙没工夫仔细的研究下2d。终于有时间来做自己喜欢的事情了。好吧，现在手里有了安装包，知易的教程和源码，还有一本中文教程。

装好了库，xcode4.4 + cocos2d1.0.1版本。虽说已经有2.0了，但是都差不多就这个吧。省着再去下载了，公司网络也不怎么好。

原库里头有实例。

这里的文章不会是教程，不可能全部讲解。只是记下我在学习时自己感到有些需要研究的地方，就说明下，给自己个深刻的记忆。

第一个比较迷糊的地方就是锚点和positon了，一开始没反应过来。

默认anchorpoint是(0.5,0.5),为你所设图形或者精灵的中心c的位置。

如果你设置为（0.3，0.5），图中红点的位置，那么他的position的点的位置是按照anchorpoint来设置的。

比方说A点为anchorpoint点，是（0，0），这时候你设置posistion为（5，5）的时候，矩形是以（5，5）点为矩形的左下角点。

整个2d的坐标系是基于opengl的，opengl的学习也是不可少的，不过为了快速的开发，现在不深究这些原理了。记住坐标系是左手坐标系。

现在主要根据知易教程来开始：

helloword,花十分钟熟悉下就好了。

今天主要分析游戏主菜单。

SysMenu

SysMenu.m文件

 1 #import "SysMenu.h"
 2 #import "cocos2d.h"
 3 
 4 #import "GameLayer.h"
 5 #import "GameCntrolMenu.h"
 6 #import "SettingsLayer.h"
 7 
 8 @implementation SysMenu
 9 
10 +(id)scene
11 {
12     CCScene * scence = [CCScene node];
13     SysMenu * layer = [SysMenu node];
14     [scence addChild:layer];
15     return scence;
16 }
17 
18 -(id)init
19 {
20     self = [super init];
21     if (self) {
22         CCSprite * sp = [CCSprite spriteWithFile:@"bg.png"];
23         sp.anchorPoint = CGPointZero;
24         
25         [self addChild:sp z:0 tag:1];
26         
27         
28         //设置菜单
29         [CCMenuItemFont setFontSize:25];
30         
31         CCMenuItem * newGame = [CCMenuItemFont itemFromString:@"新游戏"
32                                                        target:self
33                                                      selector:@selector(newGame:)];
34         [CCMenuItemFont setFontSize:25];
35         
36         CCMenuItem * loadGame = [CCMenuItemFont itemFromString:@"继续游戏"
37                                                         target:self
38                                                       selector:@selector(continueGame:)];
39         
40         CCMenuItem * GameSettings = [CCMenuItemFont itemFromString:@"游戏设置"
41                                                             target:self
42                                                           selector:@selector(OnSettings:)];
43         
44         CCMenuItem * helpGame = [CCMenuItemFont itemFromString:@"帮助"
45                                                         target:self
46                                                       selector:nil];
47         
48         CCMenuItem * quitGame = [CCMenuItemFont itemFromString:@"退出"
49                                                         target:self
50                                                       selector:@selector(onQuit:)];
51         
52         //把菜单选项加到菜单上
53         CCMenu * mn = [CCMenu menuWithItems:newGame,loadGame,GameSettings,helpGame,quitGame, nil];
54         [mn alignItemsVertically];
55         
56         [self addChild:mn z:1 tag:2];
57     }
58     return self;
59 }
60 
61 -(void)newGame:(id)sender
62 {
63     CCScene * sc = [CCScene node];
64     [sc addChild:[GameLayer node]];
65     [sc addChild:[GameCntrolMenu node]];
66     
67     [[CCDirector sharedDirector] replaceScene:[CCTransitionShrinkGrow transitionWithDuration:1.2f scene:sc]];
68 }
69 
70 -(void)continueGame:(id)sender
71 {
72     
73 }
74 
75 -(void)OnSettings:(id)sender
76 {
77     CCScene * sc = [CCScene node];
78     [sc addChild:[SettingsLayer node]];
79     
80     [[CCDirector sharedDirector] replaceScene:[CCTransitionJumpZoom transitionWithDuration:1.2f scene:sc]];
81 }
82 
83 -(void)onQuit:(id)sender
84 {
85     
86 }
87 
88 -(void)dealloc
89 {
90     [super dealloc];
91 }
92 
93 @end

我很郁闷的一件事就是，教程已经很老了，用的是0.99版本的2d，和1.0.1有很多的api不同。好吧，它打不倒我们。说不定2.0也会变api，咱们有强大的度神。

切换场景的时候，有很多过度动画，想要点炫的场景切换效果就仔细研究下CCTransition.m吧。

这里我随意挑了一个效果。 CCTransitionJumpZoom

CCScene * sc = [CCScene node];
    [sc addChild:[SettingsLayer node]];

    [[CCDirector sharedDirector] replaceScene:[CCTransitionJumpZoom transitionWithDuration:1.2f scene:sc]];

你会发现，层的切换其实很容易，初始化scence，把要显示的layer加到scence上就可以了。谁想显示就replacescence下。

不用考虑内存的问题，因为他已经帮你管理了，你要相信autorelease的实力。

好了咱们有菜单了，就开始游戏主页是显示：

GameLayer

#import "GameLayer.h"
#import "SysMenu.h"

@implementation GameLayer

- (id) init
{
    self = [super init];
    if (self)
    {
        CCSprite *sp = [CCSprite spriteWithFile:@"Space.png"];
        sp.anchorPoint = CGPointZero;
        sp.opacity = 100;
        [self addChild:sp z:0 tag:1];
        
        // Add Status Items
        
        CCLabelBMFont *lbScore = [CCLabelBMFont labelWithString:@"Time: 0" fntFile:@"font09.fnt"];
        lbScore.anchorPoint = ccp(1.0, 1.0);
        lbScore.scale = 0.6;
        [self addChild:lbScore z:1 tag:3];
        lbScore.position = ccp(310, 450);
        
        CCSpriteBatchNode * mgr = [CCSpriteBatchNode batchNodeWithFile:@"flight.png" capacity:5];
        [self addChild:mgr z:0 tag:4];
        
        CCSprite *sprite = [CCSprite spriteWithTexture:mgr.texture rect:CGRectMake(0,0,31,30) ];
        [mgr addChild:sprite z:1 tag:5];
        
        sprite.scale = 1.1;
        sprite.anchorPoint = ccp(0, 1);
        sprite.position = ccp(10, 460);
        
        CCLabelBMFont *lbLife = [CCLabelBMFont labelWithString:@"3" fntFile:@"font09.fnt"];
        lbLife.anchorPoint = ccp(0.0, 1.0);
        lbLife.scale = 0.6;
        [self addChild:lbLife z:1 tag:6];
        lbLife.position = ccp(50, 450);
        
        
        // change score
        [self schedule:@selector(step:) interval:1];
        
        // Add flight
        
        flight = [CCSprite spriteWithTexture:mgr.texture rect:CGRectMake(0,0,31,30)];
        flight.position = ccp(160, 30);
        flight.scale = 1.6;
        [mgr addChild:flight z:1 tag:99];    
        
        CCSpriteFrame * frame = [CCSpriteFrame frameWithTexture:mgr.texture rect:CGRectMake(0, 0, 31, 30)];
        NSArray * array = [[NSArray alloc] initWithObjects:frame, nil];
        
        CCAnimation * animation = [CCAnimation animationWithFrames:array delay:0.2];
        for (int i = 0; i < 3; i++) {
            int x= i%3;
            [animation addFrameWithTexture:mgr.texture rect:CGRectMake(x*32, 0, 31, 30)];
        }
        
        
//        CCAnimation *animation = [CCAnimation animationWithName:@"flight" delay:0.2f];
//        for(int i=0;i<3;i++) {
//            int x= i % 3;
//            [animation addFrameWithTexture:mgr.texture rect:CGRectMake(x*32, 0, 31, 30) ];
//        }
        
        id action = [CCAnimate actionWithAnimation: animation];
        [flight runAction:[CCRepeatForever actionWithAction:action]];
        
        // accept touch now!
        self.isTouchEnabled = YES;
        
    }
    
    return self;
}

- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    
    UITouch *touch = [touches anyObject];
    
    CGPoint location = [touch locationInView: [touch view]];
    CGPoint convertedLocation = [[CCDirector sharedDirector] convertToGL:location];
    
    [flight runAction: [CCMoveTo actionWithDuration:1 position:ccp(convertedLocation.x, convertedLocation.y)]];
    
    
    return;
}

-(void) step:(ccTime) dt
{
    time += dt;
    NSString *string = [NSString stringWithFormat:@"Time: %d", (int)time];
    
    CCLabelAtlas *label1 = (CCLabelAtlas*) [self getChildByTag:3];
    [label1 setString:string];
}

- (void) dealloc
{
    [super dealloc];
}


@end

可以看到注释的部分是老版的代码，新版的已经不再这么写了。（我怎么感觉老版的比新版的省很多事呢，可能后面兼容c++吧）

有了游戏界面和主菜单了，当然不能缺少的是设置界面。

SettingsLayer

  1 #import "SettingsLayer.h"
  2 #import "cocos2d.h"
  3 #import "SysMenu.h"
  4 
  5 @implementation SettingsLayer
  6 
  7 -(id)init
  8 {
  9     [super init];
 10     
 11     //set label font
 12     [CCMenuItemFont setFontName:@"American Typewriter"];
 13     [CCMenuItemFont setFontSize:18.0];
 14     
 15     CCMenuItemFont * title1 = [CCMenuItemFont itemFromString:@"音效"];
 16     [title1 setIsEnabled:NO];
 17     [CCMenuItemFont setFontName:@"Marker Felt"];
 18     [CCMenuItemFont setFontSize:26];
 19     CCMenuItemToggle * item1 = [CCMenuItemToggle itemWithTarget:self
 20                                                        selector:@selector(menuCallback:) items:
 21                                 [CCMenuItemFont itemFromString:@"开"],
 22                                 [CCMenuItemFont itemFromString:@"关"],
 23                                 nil];
 24      
 25     [CCMenuItemFont setFontName:@"American Typewriter"];
 26     [CCMenuItemFont setFontSize:18];
 27     CCMenuItemFont * title2 = [CCMenuItemFont itemFromString:@"音乐"];
 28     [title2 setIsEnabled:NO];
 29     [CCMenuItemFont setFontName:@"Marker Felt"];
 30     [CCMenuItemFont setFontSize:26];
 31     CCMenuItemToggle * item2 = [CCMenuItemToggle itemWithTarget:self
 32                                                        selector:@selector(menuCallback:)
 33                                                           items:
 34                                 [CCMenuItemFont itemFromString:@"开"],
 35                                 [CCMenuItemFont itemFromString:@"关"],nil];
 36     
 37     [CCMenuItemFont setFontName: @"American Typewriter"];
 38     [CCMenuItemFont setFontSize:18];
 39     CCMenuItemFont * title3 = [CCMenuItemFont itemFromString:@"AI设置"];
 40     [title3 setIsEnabled:NO];
 41     [CCMenuItemFont setFontName:@"Marker Felt"];
 42     [CCMenuItemFont setFontSize:26];
 43     CCMenuItemToggle * item3 = [CCMenuItemToggle itemWithTarget:self
 44                                                        selector:@selector(menuCallback:)
 45                                                           items:
 46                                 [CCMenuItemFont itemFromString:@"攻击型"],
 47                                 [CCMenuItemFont itemFromString:@"保守型"],nil];
 48     
 49     [CCMenuItemFont setFontName:@"American Typewriter"];
 50     [CCMenuItemFont setFontSize:18];
 51     CCMenuItemFont * title4 = [CCMenuItemFont itemFromString:@"难度"];
 52     [title4 setIsEnabled:NO];
 53     [CCMenuItemFont setFontName:@"Marker Felt"];
 54     [CCMenuItemFont setFontSize:26];
 55     CCMenuItemToggle * item4 = [CCMenuItemToggle itemWithTarget:self
 56                                                        selector:@selector(menuCallback:) items:[CCMenuItemFont itemFromString: @"妈妈的宝贝"], nil];
 57     NSArray * more_items = [NSArray arrayWithObjects:
 58                             [CCMenuItemFont itemFromString:@"菜鸟"],
 59                             [CCMenuItemFont itemFromString:@"高手"],
 60                             [CCMenuItemFont itemFromString:@"骨灰级"],nil];
 61     
 62     [item4.subItems addObjectsFromArray:more_items];
 63     
 64     item4.selectedIndex = 0;
 65     
 66     [CCMenuItemFont setFontName:@"Marker Felt"];
 67     [CCMenuItemFont setFontSize:26];
 68     
 69     CCLabelBMFont * label = [CCLabelBMFont labelWithString:@"Go back" fntFile:@"font01.fnt"];
 70     CCMenuItemLabel * back = [CCMenuItemLabel itemWithLabel:label target:self selector:@selector(backCallback:)];
 71     back.scale = 0.8;
 72     
 73     CCMenu * menu = [CCMenu menuWithItems:
 74                      title1,title2,
 75                      item1,item2,
 76                      title3,title4,
 77                      item3,item4,
 78                      back,nil];
 79     [menu alignItemsInColumns:
 80      [NSNumber numberWithUnsignedInt:2],
 81      [NSNumber numberWithUnsignedInt:2],
 82      [NSNumber numberWithUnsignedInt:2],
 83      [NSNumber numberWithUnsignedInt:2],
 84      [NSNumber numberWithUnsignedInt:1],nil];
 85     
 86     [self addChild:menu];
 87     
 88     return self;
 89                                 
 90 }
 91 
 92 -(void)dealloc
 93 {
 94     [super dealloc];
 95 }
 96 
 97 -(void) menuCallback: (id) sender
 98 {
 99     NSLog(@"selected item: %@ index:%d", [sender selectedItem], [sender selectedIndex] );
100 }
101 
102 -(void) backCallback: (id) sender
103 {
104     CCScene *sc = [CCScene node];
105     [sc addChild:[SysMenu node]];
106     
107     [[CCDirector sharedDirector] replaceScene:[CCTransitionSlideInL transitionWithDuration:1.2 scene:sc]];
108     
109 }
110 
111 @end

posted on 2012-11-08 18:34 罗凇阅读(239) 评论(0) 编辑收藏举报