UIImagePickerController *picker = [[UIImagePickerControlleralloc] init];

    //资源类型为视频库

   NSString *requiredMediaType1 = ( NSString *)kUTTypeMovie;

    picker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;

    //UIImagePickerControllerSourceTypeSavedPhotosAlbum

   NSArray *arrMediaTypes=[NSArrayarrayWithObjects:requiredMediaType1,nil];

    [pickersetMediaTypes: arrMediaTypes];

    picker.delegate = (id<UIImagePickerControllerDelegate,UINavigationControllerDelegate>) controller;

[selfpresentViewController:pickeranimated:animated completion:completion];

    [pickerrelease];