xcode iOS 中的后台应用程序，可检测来电
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background app in iOS that detects incoming phone calls
提问by revolutionary
I need to write a background application in iOS which listens to incoming phone calls on the iPhone.
我需要在 iOS 中编写一个后台应用程序来监听 iPhone 上的来电。
Is it possible? Can anyone suggest some good pointers ?
是否可以？任何人都可以提出一些好的建议吗？
Thankyou
谢谢
回答by Michael Dautermann
This would be very much against Apple's privacy policy and there's no chance an app like this would be approved.
这将非常违反 Apple 的隐私政策，而且这样的应用程序不可能获得批准。
There are call recording apps that sneakaround this restriction, though, but they use third party services and no actual built-in iPhone API's.
不过，有一些通话录音应用程序可以绕过此限制，但它们使用第三方服务并且没有实际内置的 iPhone API。
回答by emesefabian
You can do it in applicationWillEnterForeground using CTCallCenter's CTCallState properties. Don't forget to import the CoreTelephony framework. Here's an example:
您可以使用 CTCallCenter 的 CTCallState 属性在 applicationWillEnterForeground 中执行此操作。不要忘记导入 CoreTelephony 框架。下面是一个例子：
#import <CoreTelephony/CTCall.h>
#import <CoreTelephony/CTCallCenter.h>
#import <CoreTelephony/CTCarrier.h>
#import <CoreTelephony/CTTelephonyNetworkInfo.h>
- (void)applicationWillEnterForeground:(UIApplication *)application
{
[callCenter setCallEventHandler:^(CTCall *call) {
if ([[call callState] isEqual:CTCallStateIncoming] || [[call callState] isEqual:CTCallStateDialing]) {
if ([viewController isPlaying])
{
NSLog(@"Call was started.");
}
} else if ([[call callState] isEqual:CTCallStateDisconnected]) {
if (callWasStarted)
{
NSLog(@"Call was ended.");
}
}
}];
}
