iOS 从相册中拿到 图片名 ，截取后缀，图片名

//从路径中获得完整的文件名 （带后缀） 对从相册中取出的图片，视频都有效。

NSString *fileName = [filePath lastPathComponent];

//获得文件名 （不带后缀）

NSString *fileName1 = [filePath stringByDeletingPathExtension];

//获得文件的后缀名 （不带'.'）

NSString *suffix = [filePath pathExtension];

//    拿到图片名字  亲测只对图片有效

NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];

define the block to call when we get the asset based on the url (below)

ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *imageAsset)

{

ALAssetRepresentation *imageRep = [imageAsset defaultRepresentation];

DNLog(@"[imageRep filename] : %@", [imageRep filename]);

};

//    get the asset library and fetch the asset based on the ref url (pass in block above)

ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];

[assetslibrary assetForURL:refURL resultBlock:resultblock failureBlock:nil];

[picker dismissViewControllerAnimated:YES completion:nil];