我的调试器中有这样的警告,这是什么意思?
Warning: Attempt to present <RootViewViewController: 0x134ce9c0> on <MovieViewController: 0xa967290> whose view is not in the window hierarchy!
我还将MovieViewController
作为Storyboard中的初始视图控制器,我也使用ARC。
注意:当我在[super viewDidLoad];
的最低部分中间添加两个viewDidLoad
1时,这不会出现,这是错误的。
以下是我MovieViewController
的实现:
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
NSString *moviePath = [[NSBundle mainBundle] pathForResource:@"gameopening" ofType:@"m4v"];
self.moviePlayer = [AVPlayer playerWithURL:[NSURL fileURLWithPath:moviePath]];
[self.moviePlayer play];
// Create and configure AVPlayerLayer
AVPlayerLayer *moviePlayerLayer = [AVPlayerLayer playerLayerWithPlayer:self.moviePlayer];
moviePlayerLayer.bounds = CGRectMake(0, 0, 1024, 768);
moviePlayerLayer.position = CGPointMake(515,385);
moviePlayerLayer.borderColor = [UIColor clearColor].CGColor;
moviePlayerLayer.borderWidth = 3.0;
moviePlayerLayer.shadowOffset = CGSizeMake(0, 3);
moviePlayerLayer.shadowOpacity = 0.80;
// Add perspective transform
[self.view.layer addSublayer:moviePlayerLayer];
[self performSelector:@selector(loadingView) withObject:nil afterDelay:33.0];
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)];
tapGesture.numberOfTapsRequired = 1;
[self.view addGestureRecognizer:tapGesture];
}
- (void)handleTapGesture:(UITapGestureRecognizer *)sender {
if (sender.state == UIGestureRecognizerStateEnded) {
UIImageView *loadingView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 1024, 768)];
loadingView.image = [UIImage imageNamed:@"Load.png"];
[self.view addSubview:loadingView];
[self performSelector:@selector(mainV) withObject:nil afterDelay:2.0];
}
}
-(void)loadingView{
UIImageView *loadingView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 1024, 768)];
loadingView.image = [UIImage imageNamed:@"Load.png"];
[self.view addSubview:loadingView];
[self performSelector:@selector(mainV) withObject:nil afterDelay:2.0];
}
-(void)mainV {
moviePlayer = nil;
UIStoryboard *sb = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UIViewController *vc = [sb instantiateViewControllerWithIdentifier:@"mainViewController"];
vc.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentViewController:vc animated:YES completion:NULL];
}
非常感谢帮助:)
答案 0 :(得分:2)
当您的ViewController的viewDidLoad
加载到内存中时,将调用view
方法。但到那时,view
尚未显示在屏幕上(因此它尚未添加为任何其他subview
或view
的{{1}},也就是说它不在视图层次结构)。
您应该等待屏幕上的视图显示您的window
。
请改为使用MovieViewController
方法和viewDidAppear:
移动代码,您应该没问题。
答案 1 :(得分:0)
viewDidLayoutSubviews
可用于此目的。它早于viewDidAppear。