是否可以开发一个类似于 iPhone iOS 4 的本机邮件应用程序的应用程序，使用 ActiveSync 同步邮件和日历条目？
我了解新操作系统中的本机应用程序能够进行同步。我想知道第三方应用程序是否也可以完成类似的任务，有自己的设置页面，用户可以使用 Exchange 服务器创建和配置电子邮件 - 独立于操作系统的本机邮件和日历应用程序。此外，是否可以在新邮件到达服务器或添加新日历条目时立即进行同步。我尝试过使用关键字 {iPHone、sync、activesync} 进行研究，但到目前为止它们还没有为我指明正确的方向。是否有现有的应用程序或源代码可供我向老板展示作为概念验证？请帮忙。谢谢。
I understand the native app in the new OS is able to do synchronization. I am wondering if a third party app can also accomplish similar task, has its own settings page where a user can create and configure emails using Exchange server - independent of the OS's native mail and calendar app. Furthermore, is it possible that synchronization be done as soon as a new mail arrives in the server or when a new calendar entry is added. I have tried researching with the keywords {iPHone, sync, activesync} but so far they don't point me to the right direction. Is there an existing app or source code which I can present to my boss as a proof-of-concept? Please help. Thanks.
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ActiveSync：我相当确定 Apple 必须向 Microsoft 付费才能获得在其代码中使用 ActiveSync 的许可。他们的协议并不适用于第三方代码，而且 Apple 也没有使其可以通过 API 进行访问。
通知：您的应用无法在后台接收通知。您可以使用 Apple 的推送通知系统（如果您设置了自己的服务器），但如果您的应用程序未运行，那么您所能做的就是更新图标的徽章、播放声音或显示警报。除非您的代码已经在运行或者用户选择启动它以响应通知，否则您的代码不会执行。
App Store 批准：Apple 并未明确禁止第 3 方邮件客户端，但据报道，至少有一款应用程序（Gmail 客户端）因与内置应用程序过于相似而被拒绝。邮件客户端。因此，除非您的应用程序与 Apple 的 Mail 有很大不同，否则它可能不值得开发。
ActiveSync: I'm fairly certain Apple had to pay Microsoft to license ActiveSync for use in their code. Their agreement doesn't extend to third-party code and Apple hasn't made it accessible via an API anyway.
Notifications: There is no way for your app to receive notifications in the background. You can use Apple's Push Notification system (if you set up your own server) but if your app is not running then all you can do is update your icon's badge, play a sound, or display an alert. Your code won't execute unless it is already running or the user chooses to launch it in response to a notification.
App Store Approval: Apple doesn't have an explicit ban on 3rd party mail clients, but it's been reported that at least one app (a Gmail client) was rejected for being too similar to the built-in mail client. So unless your app was substantially different than Apple's Mail, it's probably not worth developing.
那么 Moxier Mail 是如何做到的呢？他们也有 Exchange ActiveSync API。 Chilkat 或 MailCore API 使用 IMAP/POP 选项来实现此目的，但它们也没有要配置的 Microsoft Exchange Server 选项。我已经使用了 Chilkat，除了 Microsoft Exchange 设置之外，我可以开发几乎像 Apple Mail 应用程序一样的应用程序。那么是否有任何 API 也可以提供 Exchange ActiveSync 选项呢？
Then how is Moxier Mail doing it. They too have Exchange ActiveSync API. Chilkat or MailCore APIs does it using IMAP/POP options but they too do not have Microsoft Exchange Server option to configure. I have used Chilkat and I can develop app almost like Apple Mail app except for Microsoft Exchange setting. So is there any API for having Exchange ActiveSync option too?