How can I open the Settings app when the user presses a button?

Question

From what I understand by using code like this:

NSURL* appUrl = [NSURL URLWithString: @\"URL\"];
[[UIApplication sharedApplication] openURL:appUrl];
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Answer 1

Swift Syntax:

UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!)