NSURL with string

Question

I have problem with NSURL. I am trying to create NSURL with string

code

    NSString *prefix = (@"tel://1234567890 ext. 101");     NSString *dialThis = [NSString stringWithFormat:@"%@", prefix];     NSURL *url = [[NSURL alloc] initWithString:dialThis];     NSLog(@"%@",url); 

also tried

    NSURL *url = [NSURL URLWithString:dialThis]; 

but it gives null . what is wrong ?

Thanks..

Answer 1

Your problem is the unescaped spaces in the URL. This, for instance, works:

    NSURL *url = [NSURL URLWithString:@"tel://1234567890x101"]; 

Edit: As does this..

    NSURL *url2 = [NSURL URLWithString:[@"tel://1234567890 ext. 101"         stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 

Answer 2

Before passing any string as URL you don't control, you have to encode the whitespace:

 NSString *dialThis = [prefix stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];  // tel://1234567890%20ext.%20101 

As a side note, iOS is not going to dial any extension. The user will have to do that manually.

From Apple URL Scheme Reference: Phone Links:

To prevent users from maliciously redirecting phone calls or changing the behavior of a phone or account, the Phone application supports most, but not all, of the special characters in the tel scheme. Specifically, if a URL contains the * or # characters, the Phone application does not attempt to dial the corresponding phone number.