APNs Apple Push Notification Services 推送消息

是否使用APNs?

首先，APNs不是绝对可靠；它可以取代SMS,  但是在某些情况下也可能代价高昂。

I would like to receive Push Notifications on my iPhone (instead of using expensive SMS gateway services).

一、配置流程

1. CSR ，保存私钥，设置密码
2. 在新建app IDs的时候就生成SSL certificate（貌似与一般的证书生成不同）
3. 制作pem文件，方便Your Server使用。 以下三合一

• The CSR
• The private key as a p12 file (PushChatKey.p12)
• The SSL certificate, aps_developer_identity.cer

二、APNs交互流程

三、代码节选

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
	self.window.rootViewController = self.viewController;
	[self.window makeKeyAndVisible];
 
	// Let the device know we want to receive push notifications
	[[UIApplication sharedApplication] registerForRemoteNotificationTypes:
		(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];
 
    return YES;
}

- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken
{
	NSLog(@"My token is: %@", deviceToken);
}
 
- (void)application:(UIApplication*)application didFailToRegisterForRemoteNotificationsWithError:(NSError*)error
{
	NSLog(@"Failed to get token, error: %@", error);
}

如果收不到apn消息:

1.请检查网络是否正常； 

2.应用程序目前是否在前台，如在前台请切换至后台。

参考：

http://www.raywenderlich.com/3443/apple-push-notification-services-tutorial-part-12

http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Introduction/Introduction.html

http://blog.mobileroadie.com/2011/06/best-practices-on-push-notifications/

http://mobiforge.com/developing/story/programming-apple-push-notification-services