Question

在gameScene背景水平移动它工作正常，但我想根据分数增加慢速和快速移动背景，我继续这种方式与nstimeinterval改变但没有什么我可以看到改变背景移动缓慢和快速它正常，如果这种方式有问题请有人帮帮我。

SKTexture *backgroundTexture = [SKTexture textureWithImageNamed:@"background10"];

    NSTimeInterval _move;
       int _gameScore;
    if (_gameScore>=5) {
        _move =0.09;
    }else{
        _move = 0.02;
    }

    SKAction *movBg = [SKAction moveByX:-backgroundTexture.size.width*2 y:0 duration:_move*backgroundTexture.size.width]; 
    SKAction *resetBg =[SKAction moveByX:backgroundTexture.size.width*2 y:0 duration:0];


    SKAction *movebackgroundforever =[SKAction repeatActionForever:[SKAction sequence:@[movBg,resetBg]]];
    for (int i= 0; i<2 + self.frame.size.width/(backgroundTexture.size.width*2 ); ++i) {
        SKSpriteNode* sprite = [SKSpriteNode spriteNodeWithTexture:backgroundTexture];
        [sprite setScale:1.0];
        sprite.zPosition = -20; 
        sprite.anchorPoint = CGPointZero;
        sprite.position = CGPointMake(i* sprite.size.width, 0);
        [sprite runAction:movebackgroundforever];
        [_bgLayer addChild:sprite];

Answer 1

试试这段代码：

它会直接将动画时间与得分_move*__gameScore相乘，您还可以为_move变量提供一些intalize值。

SKTexture *backgroundTexture = [SKTexture textureWithImageNamed:@"background10"];

NSTimeInterval _move;


SKAction *movBg = [SKAction moveByX:-backgroundTexture.size.width*2 y:0 duration:_move*__gameScore]; 
SKAction *resetBg =[SKAction moveByX:backgroundTexture.size.width*2 y:0 duration:0];


SKAction *movebackgroundforever =[SKAction repeatActionForever:[SKAction sequence:@[movBg,resetBg]]];
for (int i= 0; i<2 + self.frame.size.width/(backgroundTexture.size.width*2 ); ++i) {
    SKSpriteNode* sprite = [SKSpriteNode spriteNodeWithTexture:backgroundTexture];
    [sprite setScale:1.0];
    sprite.zPosition = -20; 
    sprite.anchorPoint = CGPointZero;
    sprite.position = CGPointMake(i* sprite.size.width, 0);
    [sprite runAction:movebackgroundforever];
    [_bgLayer addChild:sprite];

改变背景移动速度

1 个答案: