UIDocumentInteractionController Does Not Show Mail Option 2017-05-31 這篇滿神奇的，沒仔細看還沒注意到，method … Read More
[iOS] <_UIAlertControllerActionSheetRegularPresentationController>) should have a non-nil sourceView or barButtonItem set before the presentation occurs 2017-05-31 You aren’t initial… Read More