Button to reload UIWebView - swift

Question

I have created a button over top of a UIWebView that I would like to use to refresh the webview when pressed. The following code is in my ViewController class:
#IBOutlet weak var webView: UIWebView!
override func shouldAutorotate() -> Bool {
return false
}
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return UIInterfaceOrientationMask.Landscape
}
override func viewDidLoad() {
super.viewDidLoad()
let webView:UIWebView = UIWebView(frame: CGRectMake(30, 20, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
let button = UIButton(type: .System)
webView.scalesPageToFit = true
webView.multipleTouchEnabled = true
webView.backgroundColor = UIColor.whiteColor()
webView.loadRequest(NSURLRequest(URL: NSURL(string: "http://www.example.com")!))
self.view.addSubview(webView)
button.frame = CGRectMake(20, -20, 100, 100)
button.setTitle("Refresh", forState: UIControlState.Normal)
button.addTarget(self, action: Selector(reload()), forControlEvents: UIControlEvents.TouchUpInside)
webView.insertSubview(button, aboveSubview: webView)
}
func reload() {
webView.reload()
}
I have created the reload method to refresh the webView but nothing happens when I click the button. I also tried to create the reload method inside viewDidLoad to see if this fixed the issue. What could be causing this issue?

Answer 1

action: Selector(reload())
The syntax is wrong. On Xcode version 7.2 and below it should be
action: Selector("reload")
on Xcode 7.3 and up it should be
action: #selector(ClassName.funcName)
In Xcode 7.2 whole thing should be
let webView:UIWebView = UIWebView(frame: CGRectMake(30, 20, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
override func viewDidLoad() {
super.viewDidLoad()
let button = UIButton(type: .System)
webView.scalesPageToFit = true
webView.multipleTouchEnabled = true
webView.backgroundColor = UIColor.whiteColor()
webView.loadRequest(NSURLRequest(URL: NSURL(string: "http://www.example.com")!))
self.view.addSubview(webView)
button.frame = CGRectMake(20, -20, 100, 100)
button.setTitle("Refresh", forState: UIControlState.Normal)
button.addTarget(self, action: Selector("reload"), forControlEvents: .TouchUpInside)
webView.insertSubview(button, aboveSubview: webView)
}
func reload() {
webView.reload()
}

Answer 2

You defined webview inside view did load scope, take it out:
let webView:UIWebView = UIWebView(frame: CGRectMake(30, 20, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
func viewDidLoad() {
super.viewDidLoad()
let button = UIButton(type: .System)
webView.scalesPageToFit = true
webView.multipleTouchEnabled = true
webView.backgroundColor = UIColor.whiteColor()
webView.loadRequest(NSURLRequest(URL: NSURL(string: "http://www.example.com")!))
webView.layer.zPosition = 1
self.view.addSubview(webView)
button.frame = CGRectMake(0, 0, 100, 100)
button.setTitle("Reload Page", forState: UIControlState.Normal)
button.addTarget(self, action: Selector(reload()), forControlEvents: UIControlEvents.TouchUpInside)
webView.insertSubview(button, aboveSubview: webView)
}
func reload() {
webView.reload()
}