Simple OS X app with WKWebView viewer

Question

I’m trying to create simple OS X app (not iOS) with a web viewer using the new WKWebView and the Swift language. I’m hoping to take advantage of the faster performance of the WKWebView class.

In the projects AppDelegate.swift file I have the following code:

import Cocoa
import WebKit

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet weak var window: NSWindow!
    @IBOutlet var containerView : NSView! = nil

    var webView: WKWebView?

    var url = NSURL(string:"http://www.google.com/")
    var req = NSURLRequest(URL: url)
    self.webView!.loadRequest(req)

}

In the MainMenu.xib file I have added a Custom View object to the main window and linked it to the @IBOutlet var containerView.

I’m getting error messages on the last two lines of code:

var req = NSURLRequest(URL: url)

‘AppDelegate. Type’ does not have a member named ‘url’

self.webView!.loadRequest(req)

Expected declaration

Any help would be most appreciated.

Answer 1

This took me a while to figure out.

import Cocoa
@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
    @IBOutlet weak var window: NSWindow!
    var viewController : ViewController!

    func applicationDidFinishLaunching(aNotification: NSNotification) {
        self.viewController = ViewController(nibName:"ViewController", bundle:nil)
        self.window.contentView = self.viewController!.view
        self.window.contentViewController = self.viewController!
        self.viewController!.view.frame = self.window.contentView.bounds;
    }

    ...
}

This essentially replaces whatever is in my NSWindow with the view and view controller of my own making. My implementation of the ViewController class looks like this:

import Cocoa
import WebKit
class ViewController: NSViewController {
    var webView: WKWebView?

    override func loadView() {
        self.webView = WKWebView()
        self.view = self.webView!

        var url = NSURL(string:"http://www.google.com/")
        var req = NSURLRequest(URL: url!)
        self.webView!.loadRequest(req)
    } 
}

So essentially what happens is that I create a custom view controller that sets the WKWebView as its view, and then I set it and its view to the NSWindow view controller and view.

Answer 2

Move the last three lines (declaring url, req and loading the request) into a method on AppDelegate, like applicationDidFinishLaunching: (similar to what @MinnesotaSteve's answer suggests). You cannot have top-level statements like that.