iOS9 UIWebView窗口（框架）在iOS 8上的高度变化行为

Question

I notice that the iOS 9 WebView does not behave the same as per iOS 8.

That is, the content overflows the window despite a scrollview.

lazy var webView = UIWebView()

override func viewDidLoad() {
    super.viewDidLoad()

    view.addSubview(webView)
    webView.frame = view.frame
    webView.delegate = self

    // *** added over the original code in iOS 8, but does not solve anything.
    webView.layer.masksToBounds = true
    webView.scrollView.frame.size = view.frame.size
    webView.scrollView.contentSize = view.frame.size

    // Init with HTML5 app (existing working code in iOS 8)
    webView.scrollView.scrollEnabled = false
    view.backgroundColor =  UIColor.clearColor()
    webView.backgroundColor = self.view.backgroundColor
    let request = NSURLRequest(URL:basePath!)
    webView.loadRequest(request)

}

Any idea that would help solve the issue?

UPDATE : I added a screen shot (where I forced a height of 512)

Answer 1

Ok. I managed to find why the height was not handled the same way than in iOS8.

Actually, iOS 8 "fixed" an issue on y side that iOS9 don't (which, on a way, is a better approach).

My index page was wrong in setting the following webkit meta:

<meta name="viewport" content="width=device-width, height=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=0">

As you can see, the height was wrongly written device-width. As I said, iOS8 was tolerant and "replaced" to the device-height, I guess. iOS 9 doesn't.

I simply fixed to the meta as follows:

<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=0">

device-height replaced device-width in the height parameter.

Hope it helps.