在Objective-C iPhone游戏中一个接一个地放置两个背景? [英] Putting two backgrounds one after the other in objective-c iphone game?

问题描述

我正在制作一个iphone游戏

Hi I am creating an iphone game

在我的游戏层中，我有两个相同的背景图像，但我希望它们一个接一个地移动.

in my game layer, I have two identical background images but I want them to go one after the other.

一旦游戏动物(例如企鹅)越过第一个背景，我希望第一个背景走在第二个背景之后-成为连续的背景，直到游戏结束.

Once the game animal (eg a penguin) crosses the first background, I want the first background to go after the second one-- becoming a continuous background until the game is over.

我已经尝试了所有方法-用于循环，while循环等，但似乎无济于事

I have tried everything--- for loops, while loops and such but nothing seems to work

有人知道我该怎么做吗?

Does anyone have an idea for how I could go about doing this?

感谢您能为我提供的任何帮助.

Thank you for any help you can provide me.

这是我经过多次尝试后到目前为止所拥有的全部内容

this is all I have so far after many different tries

- (id) init
{
    if((self = [super init]))
    {
        for ( int x = 0; x < 10000000; ++x)
        {
            CCSprite *bg = [CCSprite spriteWithFile:@"level1.png"];
            [bg setPosition:ccp(160,240)];
            ccTexParams params = {GL_LINEAR, GL_LINEAR, GL_REPEAT, GL_REPEAT};
            [bg.texture setTexParameters:&params];
            [self addChild:bg z:0];

            CCSprite *bg2 = [CCSprite spriteWithFile:@"level1.png"];
            [bg2 setPosition:ccp(320,480)];
            ccTexParams param = {GL_LINEAR, GL_LINEAR, GL_REPEAT, GL_REPEAT};
            [bg2.texture setTexParameters:&param];
            [self addChild:bg z:0];
        }

推荐答案

如果背景完全相同，则您实际上不需要2张图像，您只需设置其中一张的纹理矩形位置，它就会连续移动.如果您在计时器上或在update方法中调用moveBackground，它将不断滚动.

If the backgrounds are the identical you don't actually need 2 images, you can just set the texture rect position of the one and it will continuously move. If you call moveBackground on a timer or in the update method it will continually scroll.

-(void)init
{
    if((self=[super init]))
    {
        background = [CCSprite spriteWithFile:@"background.png"]; 
        ccTexParams params = {GL_LINEAR,GL_LINEAR,GL_REPEAT,GL_REPEAT};
        [background.texture setTexParameters:&params];
        [self addChild:background z:0];
    }
}

-(void)moveBackground
{
    // Scroll background 5 pixels to the left
    int speed = 5;
    background.textureRect = CGRectMake(background.textureRect.origin.x-speed, 
                                        background.textureRect.origin.y, 
                                        background.textureRect.size.width, 
                                        background.textureRect.size.height);
}

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