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iOS

Posted by Gary Marston
Gary Marston
7,536 Points

var urlContents = NSString **stringWithContentsOfUrl** doesn't exist

how come i can't select NSString.stringWithContentsOfUrl in my Xcode? I'm running Xcode 6.1. This is in conjunction with the "Using Our JSON Data" section.. Thanks!

1 Answer

Chris Shaw
Chris Shaw
26,676 Points

Hi Gary,

As of OS X 10.4 the Cocoa Foundation framework set this method as deprecated when passing just an NSURL instance which is why you can select it, instead you now need to use the same method but with an encoding type and error closure which you can get more information about here.

Hope that helps.

Gary Marston
Gary Marston
7,536 Points

Hi Chris,

Thanks for the reply. My problem is I can't select the stringWithContentsOfUrl:* it doesn't appear in the list of methods in the drop down for NSString.. So when I type NSString. i can't see the method I want (stringWithContentsOfUrl: blah).

Am I missing some classes or libraries with my Xcode build?

Thanks

Gary

Chris Shaw
Chris Shaw
26,676 Points

Hi Gary,

It appears by the code you wrote above they you're using Swift which uses a modified version of the Cocoa Foundation framework, see the below for an example of using this method within Swift.

var e: NSError?
let url: NSURL = NSURL(string: "http://www.google.com")
let string = NSString(contentsOfURL: url, encoding: NSUTF8StringEncoding, error: &e)
Gary Marston
Gary Marston
7,536 Points

Many thanks Chris, this has really helped me out.

I'm getting confused when to use . notation or parenthesis.. I may need to revisit some of the lessons.

Gary