如何无限移动的背景图像中的iOS coco2d [英] How to move background images infinitely in iOS coco2d

问题描述

我要在iOS的移动Coco2d背景图片，但我有一些困难。我曾尝试提供一些网站的一些解决方案，但都没有成功地让他们能够正常工作。下面是code我目前工作： -

的背景平稳移动第一时间，但它不之后正常工作： -

code在初始化函数： -

  BG1 = [CCSprite spriteWithFile：@bg1.png];
bg1.anchorPoint = CGPointZero;
[个体经营的addChild：BG1 Z：-2];BG2 = [CCSprite spriteWithFile：@bg1.png];
[个体经营的addChild：BG2 Z：-3]。
bg2.anchorPoint = CGPointMake（480，0）;//安排每一帧重复回调
[自时间表：@selector（nextFrame :)区间：.4f];
 

---

   - （无效）nextFrame：（ccTime）DT {
    ID actionMove = [CCMoveTo actionWithDuration：0.4位置：CCP（bg1.position.x  -  100 * DT，bg1.position.y）]; //winSize.height/2）];    ID actionMove1 = [CCMoveTo actionWithDuration：0.4位置：CCP（bg2.position.x  -  100 * DT，bg2.position.y）]; //winSize.height/2）];    ID actionMoveDone = [CCCallFuncN actionWithTarget：自我选择：@选择（spriteMoveFinished :)]。
    [BG1 runAction：[CCSequence动作：actionMove，actionMoveDone，无]];
    [BG2 runAction：[CCSequence动作：actionMove1，actionMoveDone，无]];
} - （无效）spriteMoveFinished：（ID）发送{    CCSprite *精灵=（CCSprite *）寄件人;
    如果（精灵== BG1）{
        如果（bg1.position.x＆LT; -480）{
            [个体经营removeChild之：BG1清理：NO];
            bg1.position = CCP（480，bg1.position.y）;            [个体经营的addChild：BG1 Z：-2];
        }
    }
    否则，如果（精灵== BG2）
        如果（bg2.position.x＆LT; -480）{
            [个体经营removeChild之：BG2清理：NO];
            bg2.position = CCP（bg1.position.x + 480，bg1.position.y）;
            [个体经营的addChild：BG2 Z：-3]。
        }
    }
}
 

解决方案

我觉得这种方式有点简单。您初始化背景的init 和更新移动它们。

在init方法：

  //位置的背景
CCSprite * BG1 = [CCSprite spriteWithSpriteFrame：spriteFrame];
CCSprite * BG2 = [CCSprite spriteWithSpriteFrame：spriteFrame];
CCSprite * BG3 = [CCSprite spriteWithSpriteFrame：spriteFrame];
bg1.anchorPoint = CCP（0，0）;
bg1.position = CCP（0，0）;
bg2.anchorPoint = CCP（0，0）;
bg2.position = CCP（bg1.contentSize.width-1，0）;
bg3.anchorPoint = CCP（0，0）;
bg3.position = CCP（2 * bg1.contentSize.width-1，0）;
_backgrounds = @ [BG1，BG2，BG3][个体经营的addChild：BG1 Z：INT_MIN];
[个体经营的addChild：BG2 Z：INT_MIN];
[个体经营的addChild：BG3 Z：INT_MIN];
 

在更新方法：

  //无尽滚动的背景
对（在_backgrounds CCSprite * BG）{
    bg.position = CCP（bg.position.x  -  50 *三角洲，bg.position.y）;
    如果（bg.position.x＆下; -1 *（bg.contentSize.width））{
        bg.position = CCP（bg.position.x +（bg.contentSize.width * 2）-2，0）;
    }
}
 

的注：code是cocos2d的3.0 的

I have to move background images in iOS Coco2d but I am having a few difficulties. I have tried some solutions provided on some websites but have not been successful in getting them to work properly. Below is the code I am currently working on:-

The background moves smoothly the first time but it is not working properly after that:-

Code in init function :-

bg1 = [CCSprite spriteWithFile: @"bg1.png"];
bg1.anchorPoint = CGPointZero;
[self addChild:bg1 z:-2];

bg2 = [CCSprite spriteWithFile: @"bg1.png"];
[self addChild:bg2 z:-3];
bg2.anchorPoint = CGPointMake(480, 0);

// schedule a repeating callback on every frame
[self schedule:@selector(nextFrame:) interval:.4f];

---

- (void) nextFrame:(ccTime)dt {
    id actionMove = [CCMoveTo actionWithDuration:.4 position:ccp(bg1.position.x - 100 * dt, bg1.position.y)]; //winSize.height/2)];

    id actionMove1 = [CCMoveTo actionWithDuration:.4 position:ccp(bg2.position.x - 100 * dt, bg2.position.y)]; //winSize.height/2)];

    id actionMoveDone = [CCCallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)];
    [bg1 runAction:[CCSequence actions:actionMove,actionMoveDone, nil]];
    [bg2 runAction:[CCSequence actions:actionMove1,actionMoveDone, nil]];   
}

-(void)spriteMoveFinished:(id)sender {

    CCSprite *sprite = (CCSprite *)sender;
    if(sprite == bg1) {
        if (bg1.position.x < -480) {
            [self removeChild:bg1 cleanup:NO];
            bg1.position = ccp( 480 , bg1.position.y );

            [self addChild:bg1 z:-2];
        }
    }
    else if(sprite == bg2)
        if (bg2.position.x < -480) {
            [self removeChild:bg2 cleanup:NO];
            bg2.position = ccp( bg1.position.x+ 480 , bg1.position.y );
            [self addChild:bg2 z:-3];
        }
    }
}

解决方案

I think this way is a little simpler. You initialize the backgrounds in initand move them in update.

In the init method:

// position backgrounds
CCSprite *bg1 = [CCSprite spriteWithSpriteFrame:spriteFrame];
CCSprite *bg2 = [CCSprite spriteWithSpriteFrame:spriteFrame];
CCSprite *bg3 = [CCSprite spriteWithSpriteFrame:spriteFrame];
bg1.anchorPoint = ccp(0, 0);
bg1.position = ccp(0, 0);
bg2.anchorPoint = ccp(0, 0);
bg2.position = ccp(bg1.contentSize.width-1, 0);
bg3.anchorPoint = ccp(0, 0);
bg3.position = ccp(2*bg1.contentSize.width-1, 0);
_backgrounds = @[bg1, bg2, bg3];

[self addChild:bg1 z:INT_MIN];
[self addChild:bg2 z:INT_MIN];
[self addChild:bg3 z:INT_MIN];

In the update method:

// endless scrolling for backgrounds
for (CCSprite *bg in _backgrounds) {
    bg.position = ccp(bg.position.x - 50 * delta, bg.position.y);
    if (bg.position.x < -1 * (bg.contentSize.width)) {
        bg.position = ccp(bg.position.x + (bg.contentSize.width*2)-2, 0);
    }
}

Note: the code is for Cocos2d 3.0

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