I have a module inside my iOS 7+ app which is a UIWebView. The html page loads a javascript that creates custom-shaped buttons (using the Raphaeljs library). With UIWebView, I set delegate to self. The delegate method webView: shouldStartLoadWithRequest: navigationType:
is called each time one of my custom button is pressed. The requests should not be handled by the html, but rather by the iOS code. So I used a request convention (read somewhere here on stackoverflow) using "inapp" as the scheme of my requests. I then check for the host and take the appropriate action.
This code works fine on iOS 7. But the web views appear blank on iOS 8 (bug?), so I decided to use WKWebView for iOS 8 devices. The web views now render fine (and amazingly faster!), but my buttons have no effect.
I tried using - (WKNaviation *)loadRequest:(NSURLRequest *)request
, but it's not called.
I can't find a direct equivalent of the UIWebView delegate method webView: shouldStartLoadWithRequest: navigationType:
. What's the best way of handling those requests with WKWebView?
I've been looking for a good explanation myself, but haven't found one. I've used the following in my app and everything seems to work (Edit: updated based on ccoroom's comment):
UIWebViewDelegate - webView:shouldStartLoadWithRequest:navigationType:
WKNavigationDelegate - webView:decidePolicyForNavigationAction:decisionHandler:
Here's the other UIWebViewDelegate
methods:
UIWebViewDelegate - webViewDidStartLoad:
WKNavigationDelegate - webView:didCommitNavigation:
UIWebViewDelegate - webViewDidFinishLoad:
WKNavigationDelegate - webView:didFinishNavigation:
UIWebViewDelegate - webView:didFailLoadWithError:
WKNavigationDelegate - webView:didFailNavigation:withError:
- webView:didFailProvisionalNavigation:withError:
I'd love for someone to confirm this for me though.
Edit: Actually, I've answered the question you had in the title (although I'm no longer confident that webView:didCommitNavigation:
is called at the exact same point in the lifecycle), but re-reading your description it looks like what you actually need to know about is how to reimplement a Javascript/Objective-C bridge using WKWebView. So have a look at my other answer.