Ios 无法获取ChildByTag
下面是Lynda.com的iOS游戏开发教程，该教程使用cocos2d（版本2）。讲师使用以下代码在触摸事件时增加精灵图像的大小。下面代码中的log语句正在工作（即触摸事件已启用），但当我单击模拟器时，图像不会变大。这条线的摩尔数是零Ios 无法获取ChildByTag,ios,objective-c,cocos2d-iphone,Ios,Objective C,Cocos2d Iphone,下面是Lynda.com的iOS游戏开发教程，该教程使用cocos2d（版本2）。讲师使用以下代码在触摸事件时增加精灵图像的大小。下面代码中的log语句正在工作（即触摸事件已启用），但当我单击模拟器时，图像不会变大。这条线的摩尔数是零 CCSprite *mole = (CCSprite *)[self getChildByTag:1]; 这里是整个方法 - (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
CCSprite *mole = (CCSprite *)[self getChildByTag:1];
- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView: [touch view]];
location = [[CCDirector sharedDirector] convertToGL: location ];
CCLOG(@"touch happened at x: %0.2f y: %0.2f",location.x, location.y );
CCSprite *mole = (CCSprite *)[self getChildByTag:1];
if (CGRectContainsPoint([mole boundingBox], location)) {
[mole runAction:[CCSequence actions:
[CCScaleTo actionWithDuration:.25 scale:1.1],
[CCScaleTo actionWithDuration:.25 scale:1.0],
nil]];
}
}
initCCSprite*mole=（CCSprite*）[self-getChildByTag:1]-(id) init
{
// always call "super" init
// Apple recommends to re-assign "self" with the "super" return value
if( (self=[super init])) {
self.isTouchEnabled = YES;
CGSize s = [[CCDirector sharedDirector] winSize];
CCSprite *mole = [CCSprite spriteWithFile:@"mole.png"];
mole.position = ccp(s.width/2,s.height/2);
[self addChild:mole];
mole.tag = 1;
CCSprite *bg = [CCSprite spriteWithFile:@"bg.png"];
bg.anchorPoint = ccp(0,0);
[self addChild:bg z:-1];
}
return self;
}
CCSprite *mole = (CCSprite *)[self getChildByTag:1];
#import <GameKit/GameKit.h>
// When you import this file, you import all the cocos2d classes
#import "cocos2d.h"
// HelloWorldLayer
@interface HelloWorldLayer : CCLayer <GKAchievementViewControllerDelegate, GKLeaderboardViewControllerDelegate>
{
}
// returns a CCScene that contains the HelloWorldLayer as the only child
+(CCScene *) scene;
@end
#导入
//导入此文件时，将导入所有cocos2d类
#导入“cocos2d.h”
//HelloWorldLayer
@接口HelloWorldLayer:CCLayer
{
}
//返回包含HelloWorldLayer作为唯一子对象的场景
+（场景*）场景；
@结束
// Import the interfaces
#import "HelloWorldLayer.h"
// Needed to obtain the Navigation Controller
#import "AppDelegate.h"
#pragma mark - HelloWorldLayer
// HelloWorldLayer implementation
@implementation HelloWorldLayer
// Helper class method that creates a Scene with the HelloWorldLayer as the only child.
+(CCScene *) scene
{
// 'scene' is an autorelease object.
CCScene *scene = [CCScene node];
// 'layer' is an autorelease object.
HelloWorldLayer *layer = [HelloWorldLayer node];
// add layer as a child to scene
[scene addChild: layer];
// return the scene
return scene;
}
// on "init" you need to initialize your instance
-(id) init
{
// always call "super" init
// Apple recommends to re-assign "self" with the "super's" return value
if( (self=[super init]) ) {
self.isTouchEnabled = YES;
// create and initialize a Label
// CCLabelTTF *label = [CCLabelTTF labelWithString:@"Hello World" fontName:@"Marker Felt" fontSize:64];
//
// // ask director for the window size
// CGSize size = [[CCDirector sharedDirector] winSize];
//
// // position the label on the center of the screen
// label.position = ccp( size.width /2 , size.height/2 );
//
// // add the label as a child to this Layer
// [self addChild: label];
CGSize s = [[CCDirector sharedDirector] winSize];
[[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:@"moles.plist"];
CCSprite *mole = [CCSprite spriteWithSpriteFrameName:@"a0010.png"];
// CCSprite *mole = [CCSprite spriteWithFile:@"mole.png"];
mole.position = ccp(s.width/2,s.height/2);
mole.scale = .25;
//between 0 255
// mole.opacity = 100;
NSMutableArray *frames = [[NSMutableArray alloc] init];
for (int i = 1; i <= 10; i++) {
NSString *frameName = [NSString stringWithFormat:@"a%04i.png",i];
[frames addObject:[[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:frameName]];
}
CCAnimation *a = [CCAnimation animationWithFrames:frames delay:1.0f/24.0f];
[mole runAction:[CCAnimate actionWithAnimation:a restoreOriginalFrame:NO]];
[self addChild: mole];
CCSprite *bg = [CCSprite spriteWithFile:@"bg.png"];
//supposed to fill whole screen but not
//got next three lines from SO
//stackoverflow.com/questions/12383228/how-to-set-background-image-for-the-entire-scene-in-cocos2d-xcode
CGSize imageSize = bg.contentSize;
bg.scaleX = s.width/ imageSize.width;
bg.scaleY = s.height/ imageSize.height;
bg.anchorPoint = ccp(0,0);
[self addChild:bg z:-1];
//
// Leaderboards and Achievements
// *
// // Default font size will be 28 points.
// [CCMenuItemFont setFontSize:28];
//
// // to avoid a retain-cycle with the menuitem and blocks
// __block id copy_self = self;
//
// // Achievement Menu Item using blocks
// CCMenuItem *itemAchievement = [CCMenuItemFont itemWithString:@"Achievements" block:^(id sender) {
//
//
// GKAchievementViewController *achivementViewController = [[GKAchievementViewController alloc] init];
// achivementViewController.achievementDelegate = copy_self;
//
// AppController *app = (AppController*) [[UIApplication sharedApplication] delegate];
//
// [[app navController] presentModalViewController:achivementViewController animated:YES];
//
// [achivementViewController release];
// }];
//
// // Leaderboard Menu Item using blocks
// CCMenuItem *itemLeaderboard = [CCMenuItemFont itemWithString:@"Leaderboard" block:^(id sender) {
//
//
// GKLeaderboardViewController *leaderboardViewController = [[GKLeaderboardViewController alloc] init];
// leaderboardViewController.leaderboardDelegate = copy_self;
//
// AppController *app = (AppController*) [[UIApplication sharedApplication] delegate];
//
// [[app navController] presentModalViewController:leaderboardViewController animated:YES];
//
// [leaderboardViewController release];
// }];
//
//
// CCMenu *menu = [CCMenu menuWithItems:itemAchievement, itemLeaderboard, nil];
//
// [menu alignItemsHorizontallyWithPadding:20];
// [menu setPosition:ccp( size.width/2, size.height/2 - 50)];
//
// // Add the menu to the layer
// [self addChild:menu];
}
return self;
}
//- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
//{
// acceleration.x
//}
- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView: [touch view]];
location = [[CCDirector sharedDirector] convertToGL: location ];
CCLOG(@"touch happened at x: %0.2f y: %0.2f",location.x, location.y );
CCSprite *mole = (CCSprite *)[self getChildByTag:1 ];
NSLog(@"mole %@", mole);
// if (CGRectContainsPoint([mole boundingBox], location))
// {
// [mole runAction: [CCScaleBy actionWithDuration:.25 scale:1.1]];
//
// }
if (CGRectContainsPoint([mole boundingBox], location)) {
[mole runAction:[CCSequence actions:
[CCScaleTo actionWithDuration:.25 scale:1.1],
[CCScaleTo actionWithDuration:.25 scale:1.0],
nil]];
}
}
// on "dealloc" you need to release all your retained objects
- (void) dealloc
{
// in case you have something to dealloc, do it in this method
// in this particular example nothing needs to be released.
// cocos2d will automatically release all the children (Label)
// don't forget to call "super dealloc"
[super dealloc];
}
#pragma mark GameKit delegate
-(void) achievementViewControllerDidFinish:(GKAchievementViewController *)viewController
{
AppController *app = (AppController*) [[UIApplication sharedApplication] delegate];
[[app navController] dismissModalViewControllerAnimated:YES];
}
-(void) leaderboardViewControllerDidFinish:(GKLeaderboardViewController *)viewController
{
AppController *app = (AppController*) [[UIApplication sharedApplication] delegate];
[[app navController] dismissModalViewControllerAnimated:YES];
}
@end
//导入接口
#导入“HelloWorldLayer.h”
//需要获取导航控制器
#导入“AppDelegate.h”
#pragma标记-HelloWorldLayer
//HelloWorldLayer实现
@HelloWorldLayer的实现
//帮助器类方法，用于创建将HelloWorldLayer作为唯一子对象的场景。
+（场景*）场景
{
//“场景”是一个自动释放对象。
CCScene*scene=[CCScene节点]；
//“层”是一个自动释放对象。
HelloWorldLayer*层=[HelloWorldLayer节点]；
//将层作为子层添加到场景中
[场景添加子对象：层]；
//返回现场
返回场景；
}
//在“init”中，您需要初始化实例
-（id）init
{
//始终称为“超级”初始化
//苹果建议用“超级”返回值重新分配“自我”
if（（self=[super init]））{
self.isTouchEnabled=是；
//创建并初始化标签
//CCLabelTTF*label=[CCLabelTTF labelWithString:@“Hello World”fontName:@“Marker Feel”fontSize:64]；
//
////向主任询问窗口大小
//CGSize size=[[CCDirector sharedDirector]winSize]；
//
////将标签放在屏幕中央
//标签位置=ccp（尺寸宽度/2，尺寸高度/2）；
//
////将标签作为子项添加到此层
//[自添加子项：标签]；
CGSize=[[CCDirector sharedDirector]winSize]；
[[CCSpriteFrameCache sharedSpriteFrameCache]addSpriteFramesWithFile:@“moles.plist”]；
CCSprite*mole=[CCSprite spritewithpriteframename:@“a010.png”]；
//CCSprite*mole=[CCSprite spriteWithFile:@“mole.png”]；
摩尔位置=ccp（s.宽度/2，s.高度/2）；
摩尔分数=0.25；
//在0到255之间
//摩尔不透明度=100；
NSMUTABLEARRY*帧=[[NSMUTABLEARRY alloc]init]；
对于（inti=1；i按KARTHIK RA的话做
或者，您可以将CCSprite子类化，并在子类中添加触摸检测和处理程序。当我有几个可触摸Sprite时，我会这样做，因为：
- 它消除了在触摸时持续检查场景/层中所有儿童的需要
- 您可以在sprite类中提前创建动作，并在检测到触摸时运行它
- 它将动作逻辑与场景分离
- 当检测到触摸时，您就知道触摸了哪个对象
祝cocos2d好运。这是一个很棒的引擎。如果您迁移到版本3，请记住“tag”不再是CCNode的属性。它已被“name”取代，而“name”实际上是字符串类型。tag是int类型。按照KARTHIK RA说的做
或者，您可以将CCSprite子类化，并在子类中添加触摸检测和处理程序。当我有几个可触摸Sprite时，我会这样做，因为：
- 它消除了在触摸时持续检查场景/层中所有儿童的需要
- 您可以在sprite类中提前创建动作，并在检测到触摸时运行它
- 它将动作逻辑与场景分离
- 当检测到触摸时，您就知道触摸了哪个对象
祝cocos2d好运。它是一个很棒的引擎。如果您迁移到版本3，请记住“标记”不再是CCNode的属性。它已被“名称”取代这实际上是一种字符串类型。标记是一种int类型。你检查过你的mole
？它是nil吗？而且你给出的动画非常不突出。将比例1.1
更改为2.0
@inderkumarrator是的，谢谢，mole是nil
，但我不知道为什么。刚刚从教程中复制了代码。mole是在屏幕上。您是否看到这行CCSprite*mole=（CCSprite*）[self-getChildByTag:1]有问题
@inderkumarratore我更改了问题的标题和主体，以反映mole为nil的事实。这里的代码乍一看似乎还可以。您介意发布整个项目吗？我过去在将标记设置为“1”时遇到过问题，因为我没有明确标记的其他视图也有标记“1”。您介意将其更改为“1”吗类似14562的东西，看看它是否仍然有问题？你检查过你的mole
？它是零吗？而且你给出的动画也不太突出。将比例1.1
更改为2.0
@inderkumarratore是的，谢谢，mole是nil
，但我不知道为什么。只是从教程中复制了代码。mole启动了屏幕。您是否看到这行代码有问题CCSprite*mole=（CCSprite*）[self-getChildByTag:1]
@inderkumarratore我更改了问题的标题和主体，以反映摩尔为零这一事实。这里的代码乍一看似乎还行。您介意发布整个项目吗？我过去在将标记设置为“1”时遇到了问题，因为
to check null value:
if(mole!=NULL) //check null value
{
if (CGRectContainsPoint([mole boundingBox], location))
{
[mole stopAllActions];
[mole runAction:[CCSequence actions:
[CCScaleTo actionWithDuration:.25 scale:1.1],
[CCScaleTo actionWithDuration:.25 scale:1.0],
nil]];
}
}
// set the tag value mole sprite in init method (HelloWorldLayer.m).
CCSprite *mole = [CCSprite spriteWithSpriteFrameName:@"a0010.png"];
// CCSprite *mole = [CCSprite spriteWithFile:@"mole.png"];
mole.position = ccp(s.width/2,s.height/2);
mole.scale = .25;
mole.tag=1;