Question

我正在使用此代码根据UIDevice的加速度移动“下降”精灵。它工作得很好，但是非常迟缓，这意味着精灵的位置之间会有跳跃。

- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
    if(paused)
        return;
    directionPoint.x += acceleration.x * 100;
}
- (void)update:(ccTime)dt {
    if(paused)
        return;
    directionPoint.y = -500*dt;
    CGPoint playerDestinationPoint = player.position;
    playerDestinationPoint.x += directionPoint.x;
    playerDestinationPoint.y += directionPoint.y;
    if(playerDestinationPoint.x < player.contentSize.width/2) {
        playerDestinationPoint.x = player.contentSize.width/2;
    }
    else if(playerDestinationPoint.x > ([[CCDirector sharedDirector] winSize].width - play    er.contentSize.width/2)) {    
        playerDestinationPoint.x = [[CCDirector sharedDirector] winSize].width - player.contentSize.width/2;
    }
    [player setPosition:playerDestinationPoint];

    directionPoint = CGPointMake(0.0, 0.0);
}

我尝试以这种方式使用CCMoveTo：

- (void)update:(ccTime)dt {
    if(paused)
    return;
    [player stopAllActions];
    directionPoint.y = -500*dt;
    CGPoint playerDestinationPoint = player.position;
    playerDestinationPoint.x += directionPoint.x;
    playerDestinationPoint.y += directionPoint.y;
    if(playerDestinationPoint.x < player.contentSize.width/2) {
        playerDestinationPoint.x = player.contentSize.width/2;
    }
    else if(playerDestinationPoint.x > ([[CCDirector sharedDirector] winSize].width - player.contentSize.width/2)) {
        playerDestinationPoint.x = [[CCDirector sharedDirector] winSize].width - player.contentSize.width/2;
    }
    id actionMoveTo = [CCMoveTo actionWithDuration:dt position:playerDestinationPoint];
    [player runAction:actionMoveTo];

    directionPoint = CGPointMake(0.0, 0.0);
}

但是精灵根本不动。任何提示？

MFG，

侧击

Answer 1

在您的第一次更新方法中尝试：

    playerDestinationPoint.x += directionPoint.x*dt;

由于dt间隔可能会根据性能而改变。

根据加速度移动“下降”CCSprite

1 个答案: