XCode 7-Swift-通过SFSafariViewController自动加载站点

Question

I'm in the process of updating our iTunes app, and would like to take advantage of the new SFSafariViewController api. The use case is extremely simple, when user opens app, the app automatically loads the set url in a SFSafariViewController.

There seem to be limited tutorials on this, and the ones that do exist involve IBActions via links once the app is open.

How do I automatically open a link in SFSafariViewController when user clicks the app on the their device?

The following code just white pages:

import UIKit
import SafariServices

class ViewController: UIViewController
{
    private var urlString:String = "https://example.com"

    override func viewDidLoad()
    {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        let svc = SFSafariViewController(URL: NSURL(string: self.urlString)!)

        svc.presentViewController(self, animated: true, completion: nil)
    }

    override func didReceiveMemoryWarning()
    {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

----Working Code----

import UIKit
import SafariServices

class ViewController: UIViewController
{
    private var urlString:String = "https://example.com"

    override func viewDidLoad()
    {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning()
    {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func viewDidAppear(animated: Bool) {

        super.viewDidAppear(animated)

        let svc = SFSafariViewController(URL: NSURL(string: self.urlString)!)

        self.presentViewController(svc, animated: true, completion: nil)
    }
}

Answer 1

Your current code is trying to present the current view controller ( ViewController ) from the SFSafariViewController , which isn't even being displayed yet.

Try swapping this:

svc.presentViewController(self, animated: true, completion: nil)

For this:

self.presentViewController(svc, animated: true, completion: nil)