iOS Programming State Restoration 状态存储 If iOS ever needs more memory and your application is in the background, Apple might kill it to return memory to the system. 如果iOS 需要更多的memory,你的应用在后台,apple 可能杀死它来得到更多的内存给系统. This should be transparent to your u…

流计算中可能有各种方式来保存状态: 窗口操作 使用 了KV操作的函数 继承了CheckpointedFunction的函数 当开始做checkpointing的时候,状态会被持久化到checkpoints里来规避数据丢失和状态恢复.选择的状态存储策略不同,会导致状态持久化如何和checkpoints交互. 1.可用的状态持久化策略 Flink提供了三种持久化策略,如果没有显式指定,则默认使用MemoryStateBackend. The MemoryStateBackend 将数据保存在java…

iOS Programming Touch Events and UIResponder  1 Touch Events  As a subclass of UIResponder, a UIView can override four methods to handle the four distinct touch events: 作为UIResponder的一个子类,UIView可以重写四个方法来处理touch events. (1) a finger or fingers touches…

iOS Programming Web Services and UIWebView The work is divided into two parts. The first is connecting to and collecting data from a web service and using that data to create model objects. The second part is using the UIWebView class to display web…

iOS  Programming  UIGestureRecognizer and UIMenuController A UIGestureRecognizer intercepts touches that are on their way to being handled by a view. 一个UIGestureRecognizer拦截touches 在他们被一个view处理的路上. When it recognizes a particular gesture, it sends a…

iOS Programming  View and View Hierarchy 视图和视图等级 1.1(1)File → New → Project.. From the iOS section, select Application, choose the Empty Application template, and click Next. 1.2 View Basics  (1)A view is an instance of UIView or one of its subclasse…

MJRefresh地址 //  代码地址: https://github.com/CoderMJLee/MJRefresh//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000 MJRefresh默认情况下只能设置MJRefreshStateNoMoreD…

RM状态存储与还原机制详解 转载请注明原始链接http://www.cnblogs.com/shenh062326/p/3562199.html. 摘要 本文基于Apache Hadoop社区最新release版本2.3.0编写,社区从2.3.0开始支持ResourceManager的HA,已经实现的功能包括RM状态信息的存储与还原,客户端(clientToRM, AMToRM, NMToRM)实现RPC重试机制,增加Active与Standby RM角色,支持手动切换Active与Standb…

Android实训案例(八)--单机五子棋游戏,自定义棋盘,线条,棋子,游戏逻辑,游戏状态存储,再来一局 阿法狗让围棋突然就被热议了,鸿洋大神也顺势出了篇五子棋单机游戏的视频,我看到了就像膜拜膜拜,就学习了一下,写篇博客梳理一下自己的思路,加深一下印象 视频链接:http://www.imooc.com/learn/641 一.棋盘 我们一看就知道,我们必须自定义View,这里我们定义一个GameView来做游戏主类,第一步,先测量,我们这里不难知道,五子棋他的棋盘是一个正方形,所以我们需要去测…

iOS Programming Controlling Animations 动画 The word "animation" is derived from a Latin word that means "the act of bringing to life." Animations are what bring your applications to life, and when used appropriately, they can guide your…

iOS Programming NSUserDefaults  When you start an app for the first time, it uses its factory settings. As you use it, a good app learns your preferences. Where are your preferences stored? Inside each app bundle there is a plist that holds the user'…

iOS Programming  UIWebView 1 Instances of UIWebView render web content. UIWebView可以显示web content. In fact, the Safari application on your device uses a UIWebView to render its web content. 事实上,Safari application 用了一个UIWebView 显示它的web content. In this…

iOS Programming Subclassing UITableViewCell  1.Creating BNRItemCell UITableViewCell is a UIView subclass. UITableViewCell是UIView的子类. When subclassing UIView (or any of its subclasses), you often override its drawRect: method to customize the view's a…

iOS Programming UINavigationController the Settings application has multiple related screens of information: a list of settings (like Sounds), a detailed page for each setting, and a selection page for each detail. This type of interface is called a…

iOS Programming Editing UITableView 1.1 Editing mode  UITableView has an editing property, and when this property is set to YES, the UITableView enters editing mode. UITableVIew有一个editing property,当属性设置为YES时,UITableView设置为editing mode. Depending on h…

State Backends 的作用 有状态的流计算是Flink的一大特点,状态本质上是数据,数据是需要维护的,例如数据库就是维护数据的一种解决方案.State Backends 的作用就是用来维护State的.一个 State Backend 主要负责两件事:Local State Management(本地状态管理) 和 Remote State Checkpointing(远程状态备份). Local State Management(本地状态管理) State Management 的主…

理解原型对象与其实例之间是一对多的关系,对于实现正确的对象行为很重要.常见的错误是不小心将每个实例的数据存储到了其原型中. 示例 一个实现了树型数据结构的类可能将子节点存储在数组中. 实例状态在原型中(错误) 将存储子节点的数组放置在原型对象中将会导致实现被完全破坏. function Tree(x){ this.value=x; } Tree.prototype={ children:[], addChild:function(x){ this.children.push(x); } } 如果…

Session是互联网应用中非常重要的玩意儿,对于超过单台部署的站点集群,都会存在会话共享的需求.在web.config中,微软提供了sessionstate节点来定义不同的Session状态存储方式.本文就自定义模式下的Session状态存储驱动提供一些干货. 首先,想要接管Session状态存储,需要了解一些基本的东西. SessionIDManager /// <summary> /// 自定义SessionID管理器 /// </summary> public class…

state定义     不同的状态,不同的行为;或者说,每个状态有着相应的行为.         就像电风扇的开关,一档的上一个是关闭,关闭的上一个是五档,五档的上一个是四档,以此类推,而且五档的下一个是关闭,关闭的下一个是一档.那么在实际应用中,我们可能会这样做:      在上一档的方法中: Java代码   if(level == 5){ level = 4; do something(); }else if(level == 4){ level = 3; do something();…

State的定义: 不同的状态,不同的行为;或者说,每个状态有着相应的行为. 何时使用? State模式在实际使用中比较多,适合"状态的切换".因为我们经常会使用If elseif else 进行状态切换, 如果针对状态的这样判断切换反复出现,我们就要联想到是否可以采取State模式了. 不只是根据状态,也有根据属性.如果某个对象的属性不同,对象的行为就不一样,这点在数据库系统中出现频率比较高,我们经常会在一个数据表的尾部,加上property属性含义的字段,用以标识记录中一些特殊性质…

内部分享: Head First iOS Programming http://www.slideshare.net/tedzhaoxa/head-first-ios-programming-46064377…

难度 初级 学习时间 10分钟 适合人群 零基础 开发语言 Java 开发环境 JDK v11 IntelliJ IDEA v2018.3 文章原文链接 "全栈2019"Java多线程第十章:Thread.State线程状态详解 下一章 "全栈2019"Java多线程第十一章:线程优先级详解 学习小组 加入同步学习小组,共同交流与进步. 方式一:关注头条号Gorhaf,私信"Java学习小组". 方式二:关注公众号Gorhaf,回复"J…

iOS开发之CoreData数据存储 参考资料:https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/CoreData/cdProgrammingGuide.html http://www.objc.io/issue-4/…

iOS Programming Recipe 6: Creating a custom UIView using a Nib JANUARY 7, 2013 BY MIKETT 12 COMMENTS Creating a custom UIView using a Nib Assumptions You are familiar with creating UIView subclasses, and instantiating UIView’s both from a Nib file or…

iOS Programming Autorotation, Popover Controllers, and Modal View Controllers  自动旋转,Popover 控制器,Modal view controller  1.  In this chapter, you are going to make four changes to Homepwner's behavior that will tailor the app's behavior to whatever dev…

iOS Programming UIStoryboard In this chapter, you will use a storyboard instead. Storyboards are a feature of iOS that allows you to instantiate and lay out all of your view controllers in one XIB-like file. Additionally, you can wire up view control…

iOS Programming Localization 本地化 Internationalization is making sure your native cultural information is not hard-coded into your application. 国际化确保你的本土信息不是硬编码进你的应用. By cultural information, we mean language, currency, date formats, number formats, a…

iOS Programming UISplitViewController  The iPad, on the other hand, has plenty of screen space to present both views using a built-in class called UISplitViewController. iPad 有足够的屏幕空间来展现两个view用built-in 类称为UISplitViewController. UISplitViewController…

iOS Programming Dynamic Type  2       You will need to update two parts of this view controller for Dynamic Type: the rows of your table view will grow or shrink in response to the user changing the preferred text size, and the BNRItemCell will need…

iOS Programming Dynamic Type 1  Dynamic Type is a technology introduced in iOS 7 that helps realize this goal by providing specifically designed text styles that are optimized for legibility. Dynamic Type 是从iOS7引入的技术来帮助实现这个目标通过提供专门设计的text styles 为了优化…