这是我正在使用的代码。我想生成缩略图,然后我通过这些缩略图创建一个视频,并在“drawImage”UIImageView 上完成绘图。
while([self.thunbnailArray count])
{
id times = [self.thunbnailArray objectAtIndex:0];////self.thumbnailArray contains duratin of player at which thumbnail generate//////
[self.thunbnailArray removeObjectAtIndex:0];
UIImage* thumbnail = [player1 thumbnailImageAtTime:[times floatValue] timeOption:MPMovieTimeOptionExact];
UIGraphicsBeginImageContext(drawImage.frame.size);////drawImage is a UIImageView to make drawing
[drawImage.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRef firstImageRef = thumbnail.CGImage;/////merge thumbnail and drawing both together
CGFloat firstWidth = CGImageGetWidth(firstImageRef);
CGFloat firstHeight = CGImageGetHeight(firstImageRef);
CGSize mergedSize = CGSizeMake(firstWidth, firstHeight);
UIGraphicsBeginImageContext(mergedSize);
[thumbnail drawInRect:CGRectMake(0, 0, firstWidth, firstHeight)];
[viewImage drawInRect:CGRectMake(0, 0, firstWidth, firstHeight)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self.imageArray addObject:newImage];///self.imageArray used to generate video
}