今天把Xcode升级了,模拟器 用的12.1的系统,运行时发现项目总是崩溃,采用9.3系统的测试机发现错误日志如下: Application windows are expected to have a root view controller at the end of application launch 解决办法如下: self.window = [[UIWindow alloc]initWithFrame:SCREEN_RECT]; self.window.backgroundColor…

转载地址:http://blog.sina.com.cn/s/blog_6784e6ea01017jfy.html 最新更正:这个提示几乎不影响编译和运行,可以不用设置.     产生这个提示的操作:在xcode4.6中创建一个名字为appTest空工程,create一个ios-application-empty application,直接编译运行   错误提示:虽然编译通过,也能运行,但是底下有错误提示“application windows are expected to have a r…

产生这个提示的操作:在xcode4.6中创建一个名字为appTest空工程,create一个ios-application-empty application,直接编译运行 错误提示:虽然编译通过,也能运行,但是底下有错误提示“application windows are expected to have a root view controller” 原因:在较新的xcod上都会出现这种错误.在iOS5之前的版本,应用加载时,需要一个root view controller,在iOS5以下的…

windows 环境下mysql 如何修改root密码 以windows为例: 无法开启服务,将mysql更目录下的data文件夹清空,然后调用 mysqld --initialize 开启mysql 服务 net start mysql; 关闭正在运行的MySQL服务. net stop mysql; 打开DOS窗口,转到mysql\bin目录. 输入 mysqld --skip-grant-tables 回车,-skip-grant-tables 的意思是启动MySQL服务的时候跳过权限表认…

tomcat启动报错:Jul 20, 2018 11:48:37 AM org.apache.catalina.core.ContainerBase addChildInternalSEVERE: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].Stan…

http://stackoverflow.com/questions/13869817/difference-in-physical-path-root-path-virutal-path-relative-virtual-path-app 第一个答案 In regards to an ASP.NET application I think of it like this: Physical Path: OS path using drive/directory/file in which th…

解决办法:(1)修改D:\Java\apache-tomcat-7.0.88\conf\catalina.properties (122line) (2)如org.apache.catalina.startup.ContextConfig.jarsToSkip=*.jar 严重: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEng…

最近在公司更新一个老项目的时候,发现部署项目后tomcat报错,错误如下: Caused by: java.lang.IllegalStateException: Unable to complete the scan for annotations for web application [/test] due to a StackOverflowError. Possible root causes include a too low setting for -Xss and illegal…

This turtorial describes how to use Qt Creator to create a small Qt application, Text Finder. It is a simplified version of the Qt UI Tools Text Finder Example. The application user interface is constructed from Qt widgets by using Qt Designer. The a…

Windows系统下一:进入Windows窗口cmd命令行下,停止mysql服务: net stop mysql二:进入mysql的安装目录下,进去bin目录mysqld-nt.exe --skip-grant-tables三:再另一个窗口下,进去mysql的安装目录,并修改密码:执行mysql.exe>use mysql;>update set user password=password("new_pass") where user="root";&…