这么一个小问题，在百度上怎么找都找不到，在google一下就出来了，差距啊，记录一下

UIImagePickerController *pickerImage = [[UIImagePickerController alloc] init];

pickerImage.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

pickerImage.mediaTypes = [[NSArray alloc] initWithObjects:(NSString*)kUTTypeImage,nil];