XMPP协议实现即时通讯底层书写（二）--IOSXMPPFrameworkDemo+分

我希望，This is a new day! 在看代码之前，我觉得你还是应该先整理一下心情，来听我说几句： 首先，我希望你是在早上边看这篇blog，然后一边开始动手操作，如果你只是看blog而不去自己对比项目，作用不是很大。一日之计在于晨，所以怀着一颗对技术渴望，激

我希望，This is a new day!

在看代码之前，我觉得你还是应该先整理一下心情，来听我说几句：

首先，我希望你是在早上边看这篇blog，然后一边开始动手操作，如果你只是看blog而不去自己对比项目，作用不是很大。一日之计在于晨，所以怀着一颗对技术渴望，激动的，亢奋的心情去学习，你才能有所得。嗯，就拿鄙人当时做项目来说，每天早上起来的第一件事情，就是研究XMPPFramework作者的代码，按照模块来分析和模仿书写，睡觉的时候还在思考，分析，总结...

当然我并不是说每个Dev 都要向我这样，只是希望你能保持一颗积极向上的心态去对待技术，对待你的工作。

that's all。

ResourceURL：https://github.com/robbiehanson/XMPPFramework （如果你还在维护你现有的基于XMPP的产品，那么你需要sometimes 去查看，原作者是否fix 一些bug）

IphoneXMPP Demo

1.AppDelegate.m

a.大概看下头文件，ok，别跳转深入看了，下面我会教快速的看。See this method

有几个地方需要注意：

1）DDLog 用于不用不强求，鄙人喜欢干净清爽的控制台，所以就没用这玩意，因为我并不是很依赖全部打log，而是断点控制台po XXX方法，实时性找出问题修复bug

2）配置XML Stream 流 ，给你的长连接里面增加各种 buff，各种装备，各种属性。ok，不开玩笑了：），这个配置很重要，它决定了你的app需要支持哪些xmpp服务，决定了原作者（罗宾逊）哪些代码功能模块是不需要生效的

3）启动连接，当然对应的也有一个cancel connect

b 设置你的 XML Stream ，开启哪些功能

- (void)setupStream
{
	NSAssert(xmppStream == nil, @"Method setupStream invoked multiple times");
	
	// Setup xmpp stream
	// 
	// The XMPPStream is the base class for all activity.
	// Everything else plugs into the xmppStream, such as modules/extensions and delegates.

	xmppStream = [[XMPPStream alloc] init];
	
	#if !TARGET_IPHONE_SIMULATOR
	{
		// Want xmpp to run in the background?
		// 
		// P.S. - The simulator doesn't support backgrounding yet.
		//        When you try to set the associated property on the simulator, it simply fails.
		//        And when you background an app on the simulator,
		//        it just queues network traffic til the app is foregrounded again.
		//        We are patiently waiting for a fix from Apple.
		//        If you do enableBackgroundingOnSocket on the simulator,
		//        you will simply see an error message from the xmpp stack when it fails to set the property.
		
		xmppStream.enableBackgroundingOnSocket = YES;
	}
	#endif
	
	// Setup reconnect
	// 
	// The XMPPReconnect module monitors for "accidental disconnections" and
	// automatically reconnects the stream for you.
	// There's a bunch more information in the XMPPReconnect header file.
	
	xmppReconnect = [[XMPPReconnect alloc] init];
	
	// Setup roster
	// 
	// The XMPPRoster handles the xmpp protocol stuff related to the roster.
	// The storage for the roster is abstracted.
	// So you can use any storage mechanism you want.
	// You can store it all in memory, or use core data and store it on disk, or use core data with an in-memory store,
	// or setup your own using raw SQLite, or create your own storage mechanism.
	// You can do it however you like! It's your application.
	// But you do need to provide the roster with some storage facility.
	
	xmppRosterStorage = [[XMPPRosterCoreDataStorage alloc] init];
//	xmppRosterStorage = [[XMPPRosterCoreDataStorage alloc] initWithInMemoryStore];
	
	xmppRoster = [[XMPPRoster alloc] initWithRosterStorage:xmppRosterStorage];
	
	xmppRoster.autoFetchRoster = YES;
	xmppRoster.autoAcceptKnownPresenceSubscriptionRequests = YES;
	
	// Setup vCard support
	// 
	// The vCard Avatar module works in conjuction with the standard vCard Temp module to download user avatars.
	// The XMPPRoster will automatically integrate with XMPPvCardAvatarModule to cache roster photos in the roster.
	
	xmppvCardStorage = [XMPPvCardCoreDataStorage sharedInstance];
	xmppvCardTempModule = [[XMPPvCardTempModule alloc] initWithvCardStorage:xmppvCardStorage];
	
	xmppvCardAvatarModule = [[XMPPvCardAvatarModule alloc] initWithvCardTempModule:xmppvCardTempModule];