{"id":21778,"date":"2015-06-26T13:57:17","date_gmt":"2015-06-26T08:27:17","guid":{"rendered":"https:\/\/tothenewco.pro\/blog\/?p=21778"},"modified":"2016-12-19T15:17:38","modified_gmt":"2016-12-19T09:47:38","slug":"detecting-phone-call-interruption-in-ios-app","status":"publish","type":"post","link":"https:\/\/tothenewco.pro\/blog\/detecting-phone-call-interruption-in-ios-app\/","title":{"rendered":"Detecting phone call interruption in iOS App"},"content":{"rendered":"

One of the default behaviors of iOS is that it stops<\/a> all the services & functions of the app while you are on a phone call.<\/p>\n

While writing an audio-video iOS App, we must handle phone call’s interruption properly to resume the app.\u00a0It is possible\u00a0to detect a phone call and it’s states with the help of Core Telephony framework. Following steps will guide you to handle phone calls in your iPhones properly.<\/p>\n

Steps to follow :<\/strong><\/p>\n

Add\u00a0CoreTelephony<\/strong>\u00a0Framework.<\/p>\n

Import the following classes of CoreTelephony<\/strong>\u00a0into your class wherever you need to handle or detect phone call’s interruption.<\/p>\n

#import <CoreTelephony\/CTCallCenter.h>\r\n#import <CoreTelephony\/CTCall.h>\r\n<\/pre>\n
Make an object of CTCallCenter into your handler class.<\/p>\n
@property (nonatomic, strong) CTCallCenter *objCallCenter;<\/pre>\n
Add a notification observer for call state changed inside your handler class viewDidLoad<\/strong>\u00a0method.<\/p>\n
 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(CallStateDidChange:) name:@\"CTCallStateDidChange\" object:nil];<\/pre>\n
Write a call event handler for the \u00a0call center in viewDidLoad<\/strong><\/p>\n
self.objCallCenter = [[CTCallCenter alloc] init];\r\nself.objCallCenter.callEventHandler = ^(CTCall* call) {\r\n        \/\/ anounce that we've had a state change in our call center\r\n        NSDictionary *dict = [NSDictionary dictionaryWithObject:call.callState forKey:@\"callState\"];\r\n        [[NSNotificationCenter defaultCenter] postNotificationName:@\"CTCallStateDidChange\" object:nil userInfo:dict];\r\n    };\r\n<\/pre>\n
Write call state changed selector<\/p>\n
- (void)CallStateDidChange:(NSNotification *)notification\r\n{\r\n    NSLog(@\"Notification : %@\", notification);\r\n    NSString *callInfo = [[notification userInfo] objectForKey:@\"callState\"];\r\n    \r\n    if([callInfo isEqualToString: CTCallStateDialing])\r\n    {\r\n        \/\/The call state, before connection is established, when the user initiates the call.\r\n        NSLog(@\"Call is dailing\");\r\n    }\r\n    if([callInfo isEqualToString: CTCallStateIncoming])\r\n    {\r\n        \/\/The call state, before connection is established, when a call is incoming but not yet answered by the user.\r\n        NSLog(@\"Call is Coming\");\r\n    }\r\n    \r\n    if([callInfo isEqualToString: CTCallStateConnected])\r\n    {\r\n        \/\/The call state when the call is fully established for all parties involved.\r\n        NSLog(@\"Call Connected\");\r\n    }\r\n    \r\n    if([callInfo isEqualToString: CTCallStateDisconnected])\r\n    {\r\n        \/\/The call state Ended.\r\n        NSLog(@\"Call Ended\");\r\n    }\r\n\r\n}<\/pre>\n
Perform the tasks according to the phone call’s state.<\/p>\n
Hope It Helps \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"
One of the default behaviors of iOS is that it stops all the services & functions of the app while you are on a phone call. While writing an audio-video iOS App, we must handle phone call’s interruption properly to resume the app.\u00a0It is possible\u00a0to detect a phone call and it’s states with the help […]<\/p>\n","protected":false},"author":117,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":61,"footnotes":""},"categories":[1400,1772,1],"tags":[1925,1926,4848,1923,1924,1922],"class_list":["post-21778","post","type-post","status-publish","format-standard","hentry","category-ios","category-mobility","category-technology","tag-audio-video-interruption","tag-coretelephony-call-handling","tag-ios","tag-phone-call-handling-in-ios","tag-resume-app-after-phone-call","tag-system-interruption"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t