UIWebView webViewDidStartLoad Method not getting called in swift - ios

Question

I have implemented a simple webview in ios with a PDF being displayed, and I want to do 2 things:
1- remove the gray padding area around the pdf doc when it's shown on webview
2-display a button in a specific location over the pdf file given the coordinates of the button
For both the two issues above, I have found code on SO and changed them to my needs. Here is the code I have so far (the view controller)
class DocAreaController: UIViewController, UIWebViewDelegate{
#IBOutlet var myWebView: UIWebView!
override func viewDidLoad() {
super.viewDidLoad()
myWebView.scrollView.scrollEnabled = false
myWebView.scrollView.bounces = false
myWebView.scrollView.pagingEnabled = true
myWebView.userInteractionEnabled = true
myWebView.delegate = self
func webViewDidStartLoad(myWebView: UIWebView){
let paddingScript = "document.body.style.margin='0';document.body.style.padding = '0'"
let result = myWebView.stringByEvaluatingJavaScriptFromString(paddingScript)
debugPrint("method called")
let btn: UIButton = UIButton(frame: CGRectMake(188, 340, 46, 30))
btn.backgroundColor = UIColor.cyanColor() //.colorWithAlphaComponent(0.5)
btn.userInteractionEnabled = false
btn.tag = 1 // change tag property
myWebView.addSubview(btn) // add to view as subview
}
// Get the document's file path.
let filepath = (NSBundle.mainBundle().pathForResource("Reader", ofType: "pdf"))! as String
// Create an NSURL object based on the file path.
let url = NSURL.fileURLWithPath(filepath)
// Create an NSURLRequest object.
let request = NSURLRequest(URL: url)
// Load the web viewer using the request object.
myWebView.loadRequest(request)
}
}
But the webViewDidStartLoad method is not getting called. I have set the delegate for webview both in code and storyboard. What m I missing?

Answer 1

Shift the webViewDidStartLoad out of viewDidLoad method. Place it after the viewDidLoad and it should work.
override func viewDidLoad() {
super.viewDidLoad()
myWebView.scrollView.scrollEnabled = false
myWebView.scrollView.bounces = false
myWebView.scrollView.pagingEnabled = true
myWebView.userInteractionEnabled = true
myWebView.delegate = self
// Get the document's file path.
let filepath = (NSBundle.mainBundle().pathForResource("Reader", ofType: "pdf"))! as String
// Create an NSURL object based on the file path.
let url = NSURL.fileURLWithPath(filepath)
// Create an NSURLRequest object.
let request = NSURLRequest(URL: url)
// Load the web viewer using the request object.
myWebView.loadRequest(request)
}
func webViewDidStartLoad(myWebView: UIWebView){
let paddingScript = "document.body.style.margin='0';document.body.style.padding = '0'"
let result = myWebView.stringByEvaluatingJavaScriptFromString(paddingScript)
debugPrint("method called")
let btn: UIButton = UIButton(frame: CGRectMake(188, 340, 46, 30))
btn.backgroundColor = UIColor.cyanColor() //.colorWithAlphaComponent(0.5)
btn.userInteractionEnabled = false
btn.tag = 1 // change tag property
myWebView.addSubview(btn) // add to view as subview
}