如何测试IOS设备是否具有电话功能？ [英] How do I test if IOS device has telephone capabilities?

问题描述

我想通过按下iPhone用户的按钮在我的应用程序中提供电话支持，并显示iPad / iPod Touch用户的电话号码。而不是检测用户具有什么设备，是否有更好的方法来查询硬件以查看它是否具有电话功能？如果iPad 3G有一天打开语音通话，这将继续有效。

I want to offer phone support in my app at the press of a button for iPhone users, and display a phone number for iPad/iPod Touch users. Rather than detecting what device the user has, is there a better way to query the hardware to see if it has telephony capabilities? This would continue to work should iPad 3G one day open up for voice calls.

我知道如何通过UIRequiredDeviceCapabilities键将应用程序限制到设备，但是我我不想限制平台，只是检测能力。

I am aware of how to limit an app to devices through the UIRequiredDeviceCapabilities key, but I'm not looking to restrict platform, just detect capabilities.

推荐答案

检查申请是否可以打开电话号码：

Check if application can open tel url:

if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"tel:+11111"]])
  // device has phone capabilities

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