NSUserDefaults in SWIFT - Intro ViewController - ios

Question

I have a small problem in my app, the thing is that I have an intro screen - It's a screen that is supposed to greet people once and never show that screen again. The problem is that I can't seem to get the app to "remember" that it has opened once. I made a button in the bottom, which I thought I could use as a save button but it did not work properly. The Intro screen was always the initial viewcontroller.
So my question is, is there a way to use NSUserDefaults in SWIFT on a button, so that when the user clicks on it once. The introscreen will not open again. The user will just be directed to the next viewcontroller. Which in my case is a tableview.
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func NextViewcontroller(sender: AnyObject)
{
let startVC = self.viewControllerAtIndex(0) as ContentViewController
let viewControllers = NSArray(object: startVC)
self.pageViewController.setViewControllers(viewControllers as? [UIViewController], direction: .Forward, animated: true, completion: nil)
}
func viewControllerAtIndex(index: Int) -> ContentViewController
{
if ((self.pageTitles.count == 0) || (index >= self.pageTitles.count)) {
return ContentViewController()
}
let vc: ContentViewController = self.storyboard?.instantiateViewControllerWithIdentifier("ContentViewController") as! ContentViewController
vc.imageFile = self.pageImages[index] as! String
vc.titleText = self.pageTitles[index] as! String
vc.pageIndex = index
return vc
}
// MARK: - Page View Controller Data Source
func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController?
{
let vc = viewController as! ContentViewController
var index = vc.pageIndex as Int
if (index == 0 || index == NSNotFound)
{
return nil
}
index--
return self.viewControllerAtIndex(index)
}
func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
let vc = viewController as! ContentViewController
var index = vc.pageIndex as Int
if (index == NSNotFound)
{
return nil
}
index++
if (index == self.pageTitles.count)
{
return nil
}
return self.viewControllerAtIndex(index)
}
func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int
{
return self.pageTitles.count
}
func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int
{
return 0
}
}

Answer 1

I have implemented same kind of thing in my app
if let IsTermsVisible = NSUserDefaults.standardUserDefaults().objectForKey(PrefTermsAndCondition) as? Bool {
print ("BreakIsTermsVisible ")
if IsTermsVisible == true {
tncView.hidden = true
}
else {
tncView.hidden = false
}
}
else {
tncView.hidden = false
print ("false IsTermsVisible ")
}
I have added one OK button in a view once user press ok it will never show in app.
#IBAction func tncBtnClicked(sender: AnyObject) {
NSUserDefaults.standardUserDefaults().setBool(true, forKey: PrefTermsAndCondition)
tncView.hidden = true
}