Replacing UISaveVideoAtPathToSavedPhotosAlbum #selector videoSaved function - ios

Question

Xcode 7
Swift 2
Objective C
I have changed some Objective C code, and I do not know Objective C syntax at all. I have replaced the following code that was saving videos to the camera roll:
if ( UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(newPath))
// Copy it to the camera roll.
UISaveVideoAtPathToSavedPhotosAlbum(newPath, self, #selector(videoSaved:didFinishSavingWithError:contextInfo:), (__bridge void *)(AvailableVideos[0]));
else
{
[self ErrorOnDownloadOrSave];
return;
}
With code that is saving the video to the Data Container Document Directory of my app:
NSString *tempFilePath = [downloadURL path];
NSError * error = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:#"/Videos"];
//NSString *newPath = [[tempFilePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:AvailableVideos[0]];
NSString *newPath = [dataPath stringByAppendingPathComponent:AvailableVideos[0]];
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:dataPath])
[fileManager createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]; //Create folder
//copying temp video to Documents Directory
if ([fileManager fileExistsAtPath:newPath] == YES)
[fileManager removeItemAtPath:newPath error:&error];
[fileManager copyItemAtPath:tempFilePath toPath:newPath error:&error];
In the Objective C code that is saving to the iOS Camera Roll there is an Objective C "function" that is called when the "videoSaved" event is complete:
-(void)videoSaved:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
//implementation
}
I need to figure out how to call this "function", "videoSaved" after this code:
//copying temp video to Documents Directory
if ([fileManager fileExistsAtPath:newPath] == YES)
[fileManager removeItemAtPath:newPath error:&error];
[fileManager copyItemAtPath:tempFilePath toPath:newPath error:&error];
I realize the videoSaved function is a special signature for UISaveVideoAtPathToSavedPhotosAlbum but I am just so unfamiliar with Objective C that I do not know how to write a new function that I can call, and pass the my error object and maintain the implementation of videoSaved.

Answer 1

According to NSFileManager documentation, the method copyItemAtPath returns BOOL.
YES if the item was copied successfully or the file manager’s delegate stopped the operation deliberately. Returns NO if an error occurred.
So you can do something like :
if ([fileManager copyItemAtPath:tempFilePath toPath:newPath error:&error]) {
//saved
NSLog(#"video saved");
} else {
//error
NSLog(#"error occured : %#", error);
}