IOS 开发之ios视频截屏的实现代码
现在好多视频截屏软件，这里提供一个IOS 视频截屏的方法，大家可以参考下，
实现代码：
//截屏
static int i=0;
-(IBAction)screenShot:(id)sender{
UIGraphicsBeginImageContextWithOptions(CGSizeMake(640, 960), YES, 0);
[[self.window layer] renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRef imageRef = viewImage.CGImage;
CGRect rect =CGRectMake(166, 211, 426, 320);//这里可以设置想要截图的区域
CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect);
UIImage *sendImage = [[UIImage alloc] initWithCGImage:imageRefRect];
UIImageWriteToSavedPhotosAlbum(sendImage, nil, nil, nil);//保存图片到照片库
NSData *imageViewData = UIImagePNGRepresentation(sendImage);
NSArray *paths = NSSearchPathForDirectoriesInDomAIns(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *pictureName= [NSString stringWithFormat:@"screenShow_%d.png",i];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:pictureName];
NSLog(@"%@", savedImagePath);
[imageViewData writeToFile:savedImagePath atomically:YES];//保存照片到沙盒目录
CGImageRelease(imageRefRect);
i++;
}