Third party app doesn't have access to the telephony services on the iPhone. You will have to implement a third-party solution provider that utilize the internet.
Easiest and fastest way to do this would be to use a eMail to Fax service like MaxEMail. Then, just use the well established mailto: URL to launch the iPhone mail application with your fax contents. If this doesn't meet your needs, please elaborate on your question.
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第三方应用程序无法访问 iPhone 上的电话服务。您将必须实施利用互联网的第三方解决方案提供商。
Third party app doesn't have access to the telephony services on the iPhone. You will have to implement a third-party solution provider that utilize the internet.
最简单、最快的方法是使用电子邮件到传真服务，例如 MaxEMail。然后，只需使用完善的 mailto: URL 即可启动包含传真内容的 iPhone 邮件应用程序。如果这不能满足您的需求，请详细说明您的问题。
Easiest and fastest way to do this would be to use a eMail to Fax service like MaxEMail. Then, just use the well established mailto: URL to launch the iPhone mail application with your fax contents. If this doesn't meet your needs, please elaborate on your question.