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我的应用中有随机视频播放。它们是 mp4 格式。使用下面的代码，我选择一个随机数来决定播放哪个视频。它似乎经常播放，但其他时候只是播放声音而没有视频。我测试了 z 值问题，即使没有背景或任何东西，它仍然会这样做。任何帮助将不胜感激，我尝试在包括 9.2 在内的许多 iOS 版本中编译，问题仍然存在。不播放视频而只有声音是随机的，并且没有任何模式（有时会很快发生其他时间播放 40 次或更多），声音嵌入到视频中。

-(SKVideoNode*)prepareHiVideo:(SKVideoNode*)videoNode withFileURL: 
(NSURL*)fileURL
{
//AVPlayer
AVPlayer * avPlayer = [AVPlayer playerWithURL:fileURL];
[[NSNotificationCenter defaultCenter]addObserver:self  
selector:@selector(hiFinishedPlaying:) 
name:AVPlayerItemDidPlayToEndTimeNotification object:[avPlayer 
currentItem]];


//SKVideo Node
videoNode = [SKVideoNode videoNodeWithAVPlayer:avPlayer];
videoNode.zPosition=4;
[videoNode setScale:.338];
return videoNode;
} 
-(void)animatedHis {
SKVideoNode * node;
name.text = @"";
NSURL *fileURL;
AVPlayer * hiPlayer = [[AVPlayer alloc]init];
randomNumber = arc4random_uniform(9);
while (randomNumber==previousRandom)
{
randomNumber = arc4random_uniform(9);
}
if(randomNumber==0)
{

fileURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"GrizzlyBearHi" ofType:@"mp4"]];
node=[self prepareHiVideo:node withFileURL:fileURL];
node.name=@"Grizzly Bear Hi";
node.position=CGPointMake(self.frame.size.width/5.6, self.frame.size.height/1.17);
name=[SKLabelNode labelNodeWithFontNamed:@"Helvetica-Bold"];
name.zPosition=10;
name.fontColor = [UIColor whiteColor];
name.text=@"Grizzly Bear";
name.position=CGPointMake(self.frame.size.width/5.6, self.frame.size.height/1.35);


}

First of the 9 random numbers code above, I have all 9 numbers and
ifs in code.

After ifs: 
node.zPosition=10;
name.fontSize = 18;
[self addChild:name];
[self addChild:node];
[node play];
previousRandom=randomNumber;


Cleanup code after video completes:
-(void)hiFinishedPlaying:(NSNotification *)notification
{
SKNode * node;


node = [self childNodeWithName:@"Grizzly Bear Hi" ];
if(node)
[node removeFromParent];

node = [self childNodeWithName:@"Beaver Hi" ];
if(node)
 [node removeFromParent];

 node = [self childNodeWithName:@"Goat Hi" ];
 if(node)
 [node3 removeFromParent];


node = [self childNodeWithName:@"Mountain Lion Hi" ];
 if(node)
 [node removeFromParent];

node = [self childNodeWithName:@"Bald Eagle Hi" ];
 if(node)
 [node removeFromParent];

node = [self childNodeWithName:@"Squirrel Hi" ];
 if(node)
 [node removeFromParent];

node = [self childNodeWithName:@"Wolf Hi" ];
if(node)
 [node removeFromParent];

node= [self childNodeWithName:@"Coyote Hi"];
if(node)
 [node removeFromParent];

node= [self childNodeWithName:@"Rabbit Hi"];
(if(node)
 [node removeFromParent];
4

1 回答 1

0

我最好的猜测是这可能会导致你的问题......

 node = [self childNodeWithName:@"Goat Hi" ];
 if(node)
 [node3 removeFromParent];

可能是“Goat Hi”仍然存在于屏幕上和您新创建的视频节点之上。让它看起来好像没有在播放，但你仍然会听到声音。

 node = [self childNodeWithName:@"Goat Hi" ];
 if(node)
 [node removeFromParent];

如果是这种情况，应该解决问题。希望这会有所帮助。

于 2016-03-30T02:06:09.410 回答