由于17.04不再受支持,我决定升级到17.10,但遇到以下错误,我无法解决:
Err http://archive.ubuntu.com/ubuntu stable Release
404 Not Found [IP: 91.189.88.161 80]
下面是完整的日志:
[16:44]dvinokurov@dvinokurov-WorkPC[~]$ LANG=en sudo do-release-upgrade
Checking for a
当从ubuntu 17.10升级到18.04的时候,它显示了一个关于z校更新版本和z校安全版本的错误。
E:The repository 'http://in.archive.ubuntu.com/ubuntu zesty-updates Release'
does not have a Release file.
W:Updating from such a repository can't be done securely,
and is therefore disabled by default.
W:See apt-secure(8) manpage f
每当我手动弹出一个视图控制器时,就不会在现在出现的前一个UIViewController上调用viewWillAppear。
这是两个常规的UIViewControllers。我的应用程序设置如下:
- UINavigationController
- UITabViewController with 5 UIViewControllers including UIViewControllerA
-UIViewControllerA (When I get back here, viewWillAppear doesnt get called)
-UIView