CODEWITHSUNDEEP
iphoneiosobjective-c
NSExplorer
NSExplorer

Reputation: 12149

How to determine if an app is returning from a phone call or resuming from background?

I make phone call from my application using:

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"telprompt://XXXXXXXXXX"]];

When the user ends the call, the default Apple-provided Phone app goes to the background and my application resumes focus. This happens automatically.

Now here's what I want: I'd like to call a method every time (and only when) the user returns from a call.

I tried calling this method from applicationWillEnterForeground: or applicationDidBecomeActive: but these callbacks are fired at other times when the application is being launched from the background state(which I dont want).

I'd like to determine if my application is being launched from the background state or if it is returning from a phone call so I can perform a certain task only in the former case and not latter. Any ideas?

----EDIT----

Here's how I finally did it:

See: CallStateDisconnected only detected for incoming calls, not for calls made from my app

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    [self listenForCalls];
}

- (void)listenForCalls {

    self.callCenter = [[CTCallCenter alloc] init];
    self.callCenter.callEventHandler = ^(CTCall* myCall) {
        NSString *call = myCall.callState;
        if([call isEqualToString:CTCallStateDialing]) {
              //do ur stuff
        }
    };
}

Upvotes: 3

Views: 655

Answers (2)

user1113101
user1113101

Reputation: 955

You Can use telephony framework, Which provides you call states to determine the state of phone. You can find out detail from here: http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Reference/CTCall/Reference/Reference.html#//apple_ref/doc/uid/TP40009590

Upvotes: 2

thelaws
thelaws

Reputation: 8001

Why not save a flag indicating that your app sent the user to the phone call. When your applications becomes active, if the flag is set, do the return from phone call method.

ex.

[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"DidStartPhoneCall"];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"telprompt://XXXXXXXXXX"]];

Then something like,

-(void)applicationDidBecomeActive {
    BOOL activeFromCall = [[NSUserDefaults standardUserDefaults] objectForKey:"DidStartPhoneCall"]
    if(activeFromCall && [activeFromCall boolValue] == YES) {
     // do your method 
    }
    [[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"DidStartPhoneCall"]; // reste flag
}

Upvotes: 1

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