Question

我有一个我正在研究的演示游戏并在场景中实现了暂停播放功能。这两个功能都很好。暂停将停止所有操作，并且播放将恢复除一个操作之外的操作。这是我在触摸开始时实现暂停/播放功能的方式：

    - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInNode:_bgLayer];
    [self moveZombieToward:touchLocation];

    CGPoint location = [touch locationInNode:self];
    SKNode *node = [self nodeAtPoint:location];

    if (node == _pauseButton) {
        [_pauseButton setTexture:[SKTexture textureWithImageNamed:@"pausebutton"]];
        _pauseButtonPressed = YES;
        self.scene.view.paused = YES;
    }

    if (node == _playButton) {
        [_playButton setTexture:[SKTexture textureWithImageNamed:@"playButton"]];
        _playButtonPressed = YES;
        self.scene.view.paused = NO;
    }
}

我还会更新更新方法中的时间，以便计算当前时间并暂停操作。

- (void)update:(NSTimeInterval)currentTime
{
    if (_lastUpdateTime) {
        _dt = currentTime - _lastUpdateTime;
    } else {
        _dt = 0;
    }
    _lastUpdateTime = currentTime;

    if (_pauseButtonPressed) {
        _lastUpdateTime = 0;
        return;
    }
}

这是僵尸行动方法：

- (void)moveZombieToward:(CGPoint)location
{
    [self startZombieAnimation];
    _lastTouchLocation = location;
    CGPoint offset = CGPointSubtract(location, _zombie.position);

    CGPoint direction = CGPointNormalize(offset);
    _velocity = CGPointMultiplyScalar(direction, ZOMBIE_MOVE_POINTS_PER_SEC);


}

我使用这种方法的唯一问题是（如前所述）按下播放按钮后移动僵尸[self moveZombieToward:touchLocation];的调用不起作用，所以在按下播放按钮后我无法做到再移动角色了。其他动画工作得很好，但角色不再通过触摸移动。有人可以帮助理解我做错了吗？

Answer 1

这是我想出的答案。我在这里提到它，以便其他人可以从中受益。我在上面的代码中正在做的是触发暂停按钮并触发播放按钮，但是当另一个激活时，我从未将暂停和播放按钮设置为否。代码应如下：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInNode:_bgLayer];
    [self moveZombieToward:touchLocation];

    CGPoint location = [touch locationInNode:self];
    SKNode *node = [self nodeAtPoint:location];

    if (node == _pauseButton) {
        [_pauseButton setTexture:[SKTexture textureWithImageNamed:@"pausebutton"]];
        _pauseButtonPressed = YES;
        _playButtonPressed = NO;
        self.scene.paused = YES;
    }

    if (node == _playButton) {
        [_playButton setTexture:[SKTexture textureWithImageNamed:@"playButton"]];
        _playButtonPressed = YES;
        _pauseButtonPressed = NO;
        self.scene.paused = NO;
    }
}

另外一个提示，我不得不将self.scene.view.paused = YES;更改为self.scene.paused = YES;因为我只需要暂停场景所以当我设置_lastUpdateTime = 0;时它会停止时间和播放器在游戏暂停时不会移动。是的，在精灵工具包中学到了一步。:)

暂停/玩skscene问题

1 个答案: