Re: Create a NSURL as a way to validate urls - not working
Re: Create a NSURL as a way to validate urls - not working
- Subject: Re: Create a NSURL as a way to validate urls - not working
- From: Juanjo Conti <email@hidden>
- Date: Tue, 03 Mar 2015 11:42:02 -0300
Ok, first of all thanks all for the replies.
I'm trying to solve it this an util class method:
import Cocoa
class Utils: NSObject {
class func isValidUrl(url: NSURL?) {
var lower = url?.scheme?.lowercaseString
return lower == "http" || lower == "https"
}
}
Sadly I'm getting and error in the return line that I can't interprete:
Cannot invoke == with argument list of type `($T4, $T8)`
What I'm doing wrong?
Thanks,
On Tue, Mar 3, 2015 at 6:19 AM, Mike Abdullah <email@hidden> wrote:
>
> On 3 Mar 2015, at 01:57, Jens Alfke <email@hidden> wrote:
>
>
> On Mar 2, 2015, at 3:55 PM, Juanjo Conti <email@hidden> wrote:
>
> Ok, I wanted to validate that the url is an absolute one. Is there
> something in Swift standard lib to do this?
>
>
> I typically check whether url.scheme is a non-nil, non-empty string. You
> may also want to check the scheme if you need to restrict input to HTTP
> URLs, for instance. (For example, “a:b” is a perfectly valid absolute URL,
> but probably not one your app will find useful.) Keep in mind that URL
> schemes are case-insensitive, so “HTTP:” means the same as “http:”.
>
> Also, this has nothing to do with the Swift library. NSURL is part of the
> Foundation framework, so this is independent of whether you’re using Swift
> or Objective-C.
>
>
> I’d say this is pretty good advice. The NSURL docs also used to mention an
> alternative, that you could test the -resourceSpecifier to see if it began
> with // as a pretty good test, but that’s no longer mentioned, which is
> intriguing.
>
>
--
Juanjo Conti <jjconti <http://goog_2023646312>@carouselapps.com
<email@hidden>>
Software Engineer - Carousel Apps <https://carouselapps.com>
--
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