我的游戏使用物理，我确实成功暂停了它，但我无法恢复它。节点实际上是下落的物体，暂停时它们会停留在空中，并且在暂停场景时所有物理都按预期消失。但是当我恢复时，它们会停留在空中，不会掉落，我也看不到任何类型的物理正在恢复。任何建议将不胜感激。这是我使用的：
-(void) pause{
self.scene.paused = YES;
backgroundView = [[UIView alloc] initWithFrame:self.view.bounds];
[backgroundView setBackgroundColor:[UIColor blackColor]];
[backgroundView setAlpha:.5];
UIImageView *imV = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"resume.png"]];
[imV setFrame:backgroundView.frame];
[imV setContentMode:UIViewContentModeScaleAspectFit];
[backgroundView addSubview:imV];
[backgroundView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapPause:)]];
[self.view addSubview:backgroundView];
}
-(void) tapPause:(id)sender{
[UIView animateWithDuration:.3 animations:^{
backgroundView.alpha = 0;
} completion:^(BOOL finished) {
backgroundView = nil;
[backgroundView removeFromSuperview];
}];
self.scene.view.paused = NO;
}