UIScrollView's origin changes after popping back to the UIViewController

override func viewWillAppear(_ animated: Bool) {

        

        self.Scrollview.contentOffset = CGPoint(x: 0,y :0)

    }

how to Scroll(horizontally) in collection view on button press?

https://stackoverflow.com/questions/34024031/how-to-scrollhorizontally-in-collection-view-on-button-press

How to Apply Gradient to background view of iOS Swift App

https://stackoverflow.com/questions/24380535/how-to-apply-gradient-to-background-view-of-ios-swift-app

Create UIWebView Programmatically and Load Webpage Using NSURL

1. class ViewController: UIViewController, UIWebViewDelegate {
3. override func viewDidLoad() {
4. super.viewDidLoad()
5. // Do any additional setup after loading the view, typically from a nib.
7. let myWebView:UIWebView = UIWebView(frame: CGRect(x:0, y:0, width: UIScreen.main.bounds.width, height:UIScreen.main.bounds.height))
9. self.view.addSubview(myWebView)
11. myWebView.delegate = self
13. //1. Load web site into my web view
14. let myURL = URL(string: "http://www.swiftdeveloperblog.com")
15. let myURLRequest:URLRequest = URLRequest(url: myURL!)
16. myWebView.loadRequest(myURLRequest)
18. }

How to check if a file exists in Documents folder?

let documentsURL = try! FileManager().url(for: .documentDirectory,
                                          in: .userDomainMask,
                                          appropriateFor: nil,
                                          create: true) 
let fooURL = documentsURL.appendingPathComponent("foo.html")
let fileExists = FileManager().fileExists(atPath: fooURL.path)
if fileExists==true
{
print("already existed")
}
else
{
print("no file")
}

https://stackoverflow.com/questions/1638834/how-to-check-if-a-file-exists-in-documents-folder

Enable zooming/pinch on UIWebView

1)you can use webView.scalesPageToFit=YES; programmatically

2)If you are using in xib than just click the check box "Scaling" scales Page to fit

Go to rootView when tabBar tapped

import UIKit

class RootviewTabViewController: UITabBarController {

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view.

    }

    

    override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {

        let rootView = self.viewControllers![self.selectedIndex] as! UINavigationController

        rootView.popToRootViewController(animated: false)

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

    

  

}