Open other apps from iOS app using URL scheme. Open google maps, mail from the app, call a number, send sms using Xcode.

Use openURL: function of UIApplication.

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlText]];

Call a number:

-(void)makeCall

{

    UIDevice *device = [UIDevice currentDevice];

    

    if ([[device model] isEqualToString:@"iPhone"] )

    {

        NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"telprompt:%@",@"phone number"]];

        [[UIApplication sharedApplication] openURL:url];

    }

    else

    {

        NSString *stringNotSupportFeature = [NSString stringWithFormat:@"Your device doesn't support calling feature. You can call on:\n%@",@"phone number"];

        

        NSString *stringNotSupportFeature1 = NSLocalizedString(stringNotSupportFeature, NULL);

        

        //Alert show

        

    }

    

}

Open The Google Maps:

// Create string for the place ...

NSString* placeStr = @"1 Infinite Loop, Cupertino, CA 95014";

// Encode URL encode

placeStr =  [addressText stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

// Now create the URL string ...

NSString* urlString = [NSString stringWithFormat:@"http://maps.google.com/maps?q=%@", placeStr];

// use openURL to launch the app ...

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlText]];

Mail from the app:

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto://info@example.com"]];

Send SMS:

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms:55555"]];

Open App Store:

[[UIApplication sharedApplication]  openURL:[NSURL URLWithString:@"app url"]];