Objective C: Bring back user to your application during/after he End the Call

Sometime you need come back to application after phone call initiated by your own application.

Exist two options (each from them not 100% that do you want), but if no choice..

1. After starting phone call you getting local notification alert with two option
• Cancel (stay on call screen)
• Return (back to application during your call)


NSURL *phoneSchemaURL = [NSURL URLWithString:@"tel://123456789"];
 
[[UIApplication sharedApplication] openURL:phoneSchemaURL];

UILocalNotification *localNotification = [[UILocalNotification alloc] init];
if (localNotification != nil) {
 NSDate *notificationDate = [[NSDate alloc] initWithTimeIntervalSinceNow: 3];
  
 localNotification.fireDate = notificationDate;
 [notificationDate release];
  
 localNotification.alertBody = @"Stay in app";
 localNotification.alertAction = @"Return";
  
 localNotification.soundName = UILocalNotificationDefaultSoundName;
  
 [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
}
[localNotification release];

2. After ending phone call your application retrieve focus.

   NSURL *phoneSchemaURL = [NSURL URLWithString:@"tel://123456789"];
    
    NSString *osVersion = [[UIDevice currentDevice] systemVersion];
    
   if([osVersion compare: @"3.1" options: NSNumericSearch] >= NSOrderedSame ) {
    UIWebView *webview = [[UIWebView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
    //or if you just want to call and back to application
    //UIWebView *webview = [[UIWebView alloc] init];
   
    [webview loadRequest:[NSURLRequest requestWithURL:phoneSchemaURL]];
     
    //if you just want to call and back to application remark code below, but don't forget release webview

    [self.view addSubview:webview];
    [webview release];
   } else {
    // On 3.0 and below, dial as usual
    [[UIApplication sharedApplication] openURL: phoneSchemaURL];          
   }