Setting UIDelegate for UIWebView - ios

Question

I read somewhere to read javascript console messages using the
- (void)webView:(WebView *)webView addMessageToConsole:(NSDictionary *)message
delegate method from the UIDelegate. But how/where do I need to set the delegate of the WebView (not the UIWebView) to my custom delegate?
I know Apple doesn't allow this in the AppStore, but I just want to implement this for debugging purposes.
What I tried so far:
- (void)webView:(id)sender didClearWindowObject:(id)windowObject forFrame:(WebFrame*)frame
{
[webView setUIDelegate:[[MyCustomUIDelegate alloc] init]];
}
and
-(void) webView:(id)webView windowScriptObjectAvailable:(id)newWindowScriptObject
{
[webView setUIDelegate:[[MyCustomUIDelegate alloc] init]];
}

Answer 1

This post may help you:
How can my iPhone Objective-C code get notified of Javascript errors in a UIWebView?
You can hook UIWebView control to hidden WebKit framework and get all exceptions, executed functions and similar.
Another way is posted here: Inject javascript code into the response that invoke to a objecie-c function.
NSString* path = [[NSBundle mainBundle] pathForResource:#"script"
ofType:#"js"];
NSString* content = [NSString stringWithContentsOfFile:path
encoding:NSUTF8StringEncoding
error:NULL];
[sender stringByEvaluatingJavaScriptFromString:content];
for exapmle the javascript code may be like:
console = new Object();
console.log = function(log) {
var iframe = document.createElement("IFRAME");
iframe.setAttribute("src", "ios-log:#iOS#" + log);
document.documentElement.appendChild(iframe);
iframe.parentNode.removeChild(iframe);
iframe = null;
}
console.debug = console.log;
console.info = console.log;
console.warn = console.log;
console.error = console.log;
and the objective-c code like:
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
NSString *requestString = [[[request URL] absoluteString] stringByReplacingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
//NSLog(requestString);
NSLog(#"Request: %#", requestString);
if ([requestString hasPrefix:#"ios-log:"]) {
NSString* logString = [[requestString componentsSeparatedByString:#":#iOS#"] objectAtIndex:1];
NSLog(#"UIWebView console: %#", logString);
return NO;
}
return YES;
}