本文共 3028 字，大约阅读时间需要 10 分钟。

转载自: http://www.jianshu.com/p/8e9234a70955

1.截取当前屏幕，导航栏不见。   
  方法：   
  - (UIImage*)screenView:(UIView *)view{   
  UIGraphicsBeginImageContextWithOptions(CGSizeMake(CGRectGetWidth(view.frame), CGRectGetHeight(view.frame)), NO, 1);   
  [view drawViewHierarchyInRect:CGRectMake(0, 0, CGRectGetWidth(view.frame), CGRectGetHeight(view.frame)) afterScreenUpdates:NO];   
  UIImage *snapshot = UIGraphicsGetImageFromCurrentImageContext();   
  UIGraphicsEndImageContext();   
  return snapshot;   
  }   
  使用：   
  UIImage *image = [self screenView: [UIApplication sharedApplication].keyWindow ];   
  UIImageView *snapView = [[UIImageView alloc] initWithImage:image];   
  snapView.alpha = 1.0f;   
  snapView.frame = [UIApplication sharedApplication].keyWindow.frame;   
  2.AVplay 视频流的截屏   
  发现视频流的截屏是黑色，而不是当前帧的画面   
  #pragma mark - 截图 点击事件 方法   
  - (IBAction)didClickSnip:(UIBarButtonItem *)sender {
     
  self.imgGenerator = [[AVAssetImageGenerator alloc]initWithAsset:self.playerItem.asset];   
  self.imgGenerator.requestedTimeToleranceBefore = kCMTimeZero;   
  self.imgGenerator.requestedTimeToleranceAfter = kCMTimeZero;   
  //第一种 --截图方法   
  //    CGImageRef imgRef = [self.imgGenerator copyCGImageAtTime:self.player.currentTime actualTime:NULL error:nil];   
  //   
  //    self.snipImageView.image = [UIImage imageWithCGImage:imgRef];   
  //第二种 --截图方法   
  NSValue *value = [NSValue valueWithCMTime:self.player.currentTime];   
  [self.imgGenerator generateCGImagesAsynchronouslyForTimes:@[value] completionHandler:^(CMTime requestedTime, CGImageRef  _Nullable image, CMTime actualTime, AVAssetImageGeneratorResult result, NSError * _Nullable error) {
     
  //这里先用OC对象对C变量强引用,保证在回到主线程中不会被释放掉   
  UIImage *img = [UIImage imageWithCGImage:image];   
  dispatch_async(dispatch_get_main_queue(), ^{
     
  self.snipImageView.image = img;   
  });   
  }];   
  }   
    
  3.AVplay 获取当前帧图片   
  /**   
  Description   
  获取当前帧图片   
  @return return value description   
  */   
    
  //获取输出流的地址   
  @property(nonatomic, strong) AVPlayerItemVideoOutput * videoOutPut;   
  -(UIImage*)getScreenShotImg{
     
  CMTime time = [self.videoOutPut itemTimeForHostTime:CACurrentMediaTime()];   
  if (0 == time.value) {
     
  return nil;   
  }   
  //截取到对应的图片   
  if ([self.videoOutPut hasNewPixelBufferForItemTime:time]) {
     
  CVPixelBufferRef lastSnapshotPixelBuffer = [self.videoOutPut copyPixelBufferForItemTime:time itemTimeForDisplay:NULL];   
  CIImage *ciImage = [CIImage imageWithCVPixelBuffer:lastSnapshotPixelBuffer];   
  CIContext *context = [CIContext contextWithOptions:NULL];   
  CGRect rect = CGRectMake(0,   
  0,   
  CVPixelBufferGetWidth(lastSnapshotPixelBuffer),   
  CVPixelBufferGetHeight(lastSnapshotPixelBuffer));   
  CGImageRef cgImage = [context createCGImage:ciImage fromRect:rect];   
  self.screenShotImg = [UIImage imageWithCGImage:cgImage];   
  //当前帧的画面   
  CGImageRelease(cgImage);   
  return self.screenShotImg;   
  }   
  return nil;   
  }  
 作者：白色的黑豹1链接：http://www.jianshu.com/p/8e9234a70955來源：简书著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。