Making a phone call in an iOS application

Question

I have some code which attempts to make a call within an application, but it doesn't seem to be working:

    UIApplication *myApp = [UIApplication sharedApplication];     NSString *theCall = [NSString stringWithFormat:@"tel://%@",phone];     NSLog(@"making call with %@",theCall);     [myApp openURL:[NSURL URLWithString:theCall]]; 

Sometimes, the variable phone is something such as @"(102) 222-2222". How can I make a call with a phone number like this? Do I need to manually extract the numbers out of it and get rid of all the extra punctuation?

Answer 1

Yup. You need to take those out yourself. Or you can use the snippet below...

NSString *cleanedString = [[phoneNumber componentsSeparatedByCharactersInSet:[[NSCharacterSet characterSetWithCharactersInString:@"0123456789-+()"] invertedSet]] componentsJoinedByString:@""]; NSURL *telURL = [NSURL URLWithString:[NSString stringWithFormat:@"tel:%@", cleanedString]]; 

Note: you may be tempted to use -stringByTrimmingCharactersInSet:, but that one only removes characters at the start and the end of the string, not if they appear in the middle.

Answer 2

To go back to original app you can use telprompt:// instead of tel:// - The tell prompt will prompt the user first, but when the call is finished it will go back to your app:

NSString *phoneNumber = [@"telprompt://" stringByAppendingString:mymobileNO.titleLabel.text]; [[UIApplication sharedApplication] openURL:[NSURL URLWithString:phoneNumber]]; 

just an update on above answer.