UIWebView sizeToFit() Smaller - ios

Question

It appears that using sizeToFit() on a UIWebView does not change the size to be smaller, only larger. This is some set-up code:
var scrollView: UIScrollView!
var webView: UIWebView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
scrollView = UIScrollView()
scrollView.frame = CGRect(x: 50.0, y: 50.0, width: 800.0, height: 1200.0)
webView = UIWebView()
webView.frame = CGRect(x: 50.0, y: 50.0, width: 800.0, height: 1.0)
webView.scrollView.scrollEnabled = false
webView.delegate = self
webView.scalesPageToFit = false
webView.loadHTMLString("Test", baseURL: nil)
self.view.addSubview(scrollView)
scrollView.addSubview(webView)
}
This is my test code. It changes the size of the content to be VERY LARGE after 3 seconds, then VERY SMALL after another 3 seconds:
dispatch_after_delay_main(3) {
self.webView.loadHTMLString("Test Test Test Test ", baseURL: nil)
// Much longer string abbreviated here
dispatch_after_delay_main(3, block: {
self.webView.loadHTMLString("Test", baseURL: nil)
})
}
This is called after the HTML is loaded. The goal is to change the size of the webView based on the size of its content. Note: I've done this with both .sizeToFit() and sizeThatFits() with the same size result.
func webViewDidFinishLoad(webView: UIWebView) {
webView.frame.size.height = 0.0 // Just in case
webView.sizeToFit()
}
I've omitted the print statements at the end of webViewDidFinishLoad(webView: UIWebView) but they output the size growing, but not decreasing. In other words, it will grow, but then once "Test" is loaded, it does not decrease in size.
(800.0, 1.0) // "Test" (before sizeToFit() called)
(800.0, 1976.0) // "Test Test .... Test "
(800.0, 1976.0) // "Test"

Answer 1

do you need the webview embedded on a scrollView? I think not.
Try to change your HTML string to "<div id='main-html'>Your text</div>" and then on the webViewDidFinishLoad delegate function you will do these things:
First, you get the content height with:
var result : Float = NSString (webView.stringByEvaluatingJavaScriptFromString("document.getElementById('main-html').offsetHeight").floatValue
Second, change the webview height with the result value.
And tries to change the height of webView.scrollView.contentSize using the same result value.
Finally, use the webView.sizeToFit()
Cheers
EDIT:
As you said, you can use:
func webViewDidFinishLoad(webView: UIWebView) {
webView.frame.size.height = 1.0 // Value needs to be > 0.0 and < of the current height
webView.sizeToFit()
}