UIWebView is not shown - ios

Question

WebView in Mainstoryboard is not shown anything. I wanna show yahoo page in my app.When I run my app in an emulator(that is not my real iPhone), it is like only　black screen.
Any error does not happen in that time, but
warning
In this part, I got a warning
"signal SIGABRT"
My code is like
import Foundation
import Alamofire
import UIKit
class webViewController: UIViewController {
#IBOutlet var webBrowser: UIWebView! = nil
var targetURL = "https://www.yahoo.co.jp"
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//loadAddressURL()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func loadAddressURL() {
let requestURL = NSURL(string: targetURL)
let req = NSURLRequest(url: requestURL as! URL)
webBrowser.loadRequest(req as URLRequest)
}
}
I think a connection of WebView & WebViewController is ok. I tried to do Add Exception Breakpoint,and find a point of this error.
The result is
result
My app dropped in
"Thread1:breakpoint4.1".
What is wrong with my app?

Answer 1

You cannot assign nil value to #IBOutlet var webBrowser: UIWebView!.
Leave:
#IBOutlet weak var webBrowser: UIWebView!
BTW, I'm assuming that you create correctly #IBOutlet by holding ctr and dragging from storyboard to you view controller. But I'm afraid that because of lack weak next to your #IBOutlet you created it manually in code so you need to clip it to the view in storyboard

Answer 2

CTRL + DRAG to create IBOutlet for UIWebView like mentioned in below image and it should be:
#IBOutlet weak var webBrowser: UIWebView!
Initialize your targetURL like :
let targetURL = "https://www.yahoo.co.jp".addingPercentEncoding( withAllowedCharacters: .urlQueryAllowed)
Then in your func loadAddressURL must be
func loadAddressURL() {
if NSURL(string: targetURL!) != nil {
let url = URL(string: targetURL!)!
webBrowser.loadRequest(URLRequest(url: url))
}
}

Answer 3

import UIKit
class ViewController: UIViewController {
#IBOutlet weak var webBrowser: UIWebView!
var targetURL = "https://www.yahoo.co.jp"
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.loadAddressURL()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func loadAddressURL() {
let requestURL = NSURL(string: targetURL)
let req = NSURLRequest(url: requestURL! as URL)
webBrowser.loadRequest(req as URLRequest)
}
}
Use this.