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客戶端穩定性和提升用戶體驗。

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1，掌握app的運行狀態

這是官方文檔中關于Application State的詳細描述：

https://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html\

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2，嘗試在后臺接收報警信息的嘗試：后臺運行。

這是官方文檔中關于后臺和多任務的詳細描述：

https://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html

經研究發現后臺運行在iOS下限制很多，iOS只針對幾類功能提供了后臺執行能力：播放音樂、GPS導航、跟外圍設備通信、藍牙通信等。所以不太適合我們這個應用。

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3，嘗試使用Push Notification接收報警信息：

這是對Remote Push Notification機制的概述：

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

要實現push notification，需要以下三部分知識：

a，Scheduling, Registering, and Handling Notifications

https://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/IPhoneOSClientImp/IPhoneOSClientImp.html#//apple_ref/doc/uid/TP40008194-CH103-SW1

b，Apple Push Notification Service

https://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/ApplePushService/ApplePushService.html#//apple_ref/doc/uid/TP40008194-CH100-SW9

c，Provisioning and Development

https://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/ProvisioningDevelopment/ProvisioningDevelopment.html#//apple_ref/doc/uid/TP40008194-CH104-SW1

d，Provider Communication with Apple Push Notification Service

https://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CommunicatingWIthAPS/CommunicatingWIthAPS.html#//apple_ref/doc/uid/TP40008194-CH101-SW1

最終決定使用這種方式實現報警信息推送。

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4，這是stackoverflow中關于如何實現Provider server的問答：

http://stackoverflow.com/questions/7791549/how-to-create-a-server-for-apns-for-iphone

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That‘s all。

轉載于:https://www.cnblogs.com/tara/archive/2012/02/25/2368016.html

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