If all your threads except the main ones are daemons, the best approach is generally thread.interrupt_main() -- any thread can use it to raise a KeyboardInterrupt in the main thread, which can normally lead to reasonably clean exit from the main thre…

This example changes the focus traversal keys for the entire application. For an example of how to change the focus traversal keys for a particular component, see e610 Setting Focus Traversal Keys in a Component. // Change the forward focus traversal…

Application.Exit:通知winform消息循环退出.程序会等待所有的前台线程终止后才能真正退出.是一种强行退出方式,就像 Win32 的 PostQuitMessage().它意味着放弃所有消息泵,展开调用堆栈,并将执行返回给系统 方法停止在所有线程上运行的所有消息循环,并关闭应用程序的所有窗口 解决方法:1. 背景线程为避免因为线程造成程序无法退出,可以将线程设置为后台线程(IsBackground = true).当然,这样一来,你需要自行处理后台线程的数据操作安全. Envi…

可能是系统自动升级正在运行,yum在锁定状态中. 已经有一个yum进程在运行了,使用kill干掉它: # # ps aux|grep yum root pts/ S+ : : grep yum root ? Z Sep19 : [yumBackend.py] <defunct> 很遗憾,kill对付不了它,那怎么办呢? 可以通过强制关掉yum进程: #rm -f /var/run/yum.pid 然后就可以使用yum了.…

untimeError: Model class app_anme.models.User doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS. 关于django错误的导入错误 1.错误的导入方式如下: 2.正确的导入方式: 只有使用users.models的导入方式才能导入成功,使用绝对路径也不行. ps:如有大神知道原因请告知,不胜感谢!…

yum 安装报错 "Another app is currently holding the yum lock; waiting for it to exit... The other application is: PackageKit Memory : 153 M RSS (266 MB VSZ) Started: Thu Jul 12 00:03:05 2012 - 06:17 ago State : Sleeping, pid: 4018Another app is currently…

大家都知道,现在安装Android系统的手机版本和设备千差万别,在模拟器上运行良好的程序安装到某款手机上说不定就出现崩溃的现象,开发者个人不可能购买所有设备逐个调试,所以在程序发布出去之后,如果出现了崩溃现象,开发者应该及时获取在该设备上导致崩溃的信息,这对于下一个版本的bug修复帮助极大,所以今天就来介绍一下如何在程序崩溃的情况下收集相关的设备参数信息和具体的异常信息,并发送这些信息到服务器供开发者分析和调试程序. 我们先建立一个crash项目,项目结构如图: 在MainActivity.ja…

http://shaheengandhi.com/controlling-thread-exit/ While most concurrency can be dealt with by using GCD dispatch queues, there are some things for which you will want to use a separate NSThread. For instance, concurrent network programming remains mo…

Application Fundamentals--应用程序基础知识 Key classes--关键类 Activity Service BroadcastReceiver ContentProvider Intent In this document--在这篇文章中 Application Components--应用程序组件 Activating components: intents--激活组件:意图 Shutting down components--关闭组件 The manifest…

Another app is currently holding the yum lock; waiting for it to exit... The other application is: PackageKit Memory : 46 M RSS (925 MB VSZ) Started: Thu Jul 6 08:40:45 2017 - 01:57 ago State : Running, pid: 10884 解决方法:手工杀死yum进程 sudo kill -9 10884…