We were required to install the QQ app before we can log-in via QQ. The user should be able to log-in and access their account, without requiring additional applications to be installed. 这是别拒理...
UIAlertController在显示时有一个推出的过程,用alertview,只需要show一下,那么我想在viewDidLoad方法中推出一个alert,总会提示Attempt to present <UIAlertController: 0x7fe42143e910> on <ViewCon...