Is there a possibility to get a signal from a uiwebview?
In my case, I display a webpage in the webview. When the user presses a button on the website, my App should (also) react to this.
Thanks for help
Yes you can do this. Implement
– webView:shouldStartLoadWithRequest:navigationType:
This delegate . This method gets called whenever your webview is about to make a request. So now when someone clicks a button on your webpage, you will get a call to this method. After you catch this call, you can choose to do whatever you want with it. Like redirect the link through your own servers, or log a request to your server about user activity etc.
Example - here you are trying to intercept any links clicked on your webpage & pass it through myMethodAction first.
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType
{
if(navigationType == UIWebViewNavigationTypeLinkClicked)
{
if(overrideLinksSwitch.on == TRUE)
{
[self myMethodAction];
[myWebView stopLoading];
return YES;
}
else
{
return YES;
}
}
return YES;
}
Hope this helps...
UIWebViewDelegate provide several methods. I had used one of them like this
-(BOOL) webView:(UIWebView *)inWeb shouldStartLoadWithRequest:(NSURLRequest *)inRequest navigationType:(UIWebViewNavigationType)inType {
if ( inType == UIWebViewNavigationTypeLinkClicked ) {
// do stuff
return NO;
}
return YES;
}
Related
I have a UIWebView that works ok. The delegate is working. When I open a URL, events shouldStartLoadWithRequest and webViewDidFinishLoad are fired.
But when for example I click on a Google search result, only shouldStartLoadWithRequest is fired, and webViewDidFinishLoad is never called.
This is causing problems because if I put a "loading..." indicator on shouldStartLoadWithRequest, in these cases the indicator still remains even after the page is correctly loaded.
Any idea why this is happening?
in .h file add <UIWebViewDelegate>
and in .m:
yourWebview=[[UIWebView alloc]init];
yourWebview.delegate=self;
When you click on search, the navigationType is UIWebViewNavigationTypeFormSubmitted. So in this case, the return type should be YES. If it is not, webViewDidFinishLoad method is not fired.
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSLog(#"shouldStartLoadWithRequest");
if ( navigationType == UIWebViewNavigationTypeLinkClicked ){
NSLog(#"UIWebViewNavigationTypeLinkClicked");
return YES;
}
if (navigationType ==UIWebViewNavigationTypeFormSubmitted ) {
NSLog(#"UIWebViewNavigationTypeFormSubmitted");
return YES;
}
if (navigationType ==UIWebViewNavigationTypeBackForward) {
NSLog(#"UIWebViewNavigationTypeBackForward");
return YES;
}
if (navigationType ==UIWebViewNavigationTypeFormResubmitted) {
NSLog(#"UIWebViewNavigationTypeFormResubmitted");
return YES;
}
if (navigationType ==UIWebViewNavigationTypeReload) {
NSLog(#"UIWebViewNavigationTypeReload");
return YES;
}
return YES;
}
This problem is usually found on ipad applications .... but you can solve your problem by using [self performselector:afterdelay] , you have to check in selector method whether webview has loaded or not using [m_pWebview loaded]; and according to that perform indicator stopping .... it's not the proper solution but it works .......
Not an expert on Google API, but as I suspected this might be your reason.
I am relatively new to Xcode and I have started building an app that uses UIWebView. To make it compliant for App Store submission, Apple prefers you use Safari. To overcome this problem I want to add a button to my UIWebView navigation that, when clicked, will open the same url in Safari. An example of this can be seen in the Twitter app; they have a button that opens the currently viewed UIWebView in a Safari window.
You can use the UIWebViewDelegate's method
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
if iWantToOpenThisURLInSafari([request URL]) {
[UIApplication openUrl:[request URL]];
return NO; // tell the webView to not navigate to the URL, I'm handling it
} else {
return YES;
}
}
- (BOOL)iWantToOpenThisURLInSafari:(NSURL* url) [
// you just have to fill in this method.
return NO;
}
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIWebViewDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intf/UIWebViewDelegate
EDIT: more details as requested by #PaulGraham
// You have a pointer to you webView somewhere
UIWebView *myWebView;
// create a class which implements the UIWebViewDelegate protocol
#interface MyUIWebViewDelegate:NSObject<UIWebViewDelegate>
// in this class' #implementation, implement the shouldStartLoad..method
#implementation
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
if iWantToOpenThisURLInSafari([request URL]) {
[UIApplication openUrl:[request URL]];
return NO; // tell the webView to not navigate to the URL, I'm handling it
} else {
return YES;
}
}
// then, set the webView's delegate to an instance of that class
MyUIWebViewDelegate* delegate = [[MyUIWebViewDelegate alloc] init];
webView.delegate = delegate;
// your delegate will now recieve the shouldStartLoad.. messages.
I am receiving shouldstartloadwithrequest event and I need to stop request for some conditions. How to stop uiwebview request when shouldstartloadwithrequest? Thank you
Check for the condition, then return NO in shouldStartLoadWithRequest. Make sure to set delegate appropriately and include the UIWebViewDelegate protocol in the interface of the delegate class.
You can invoke the stopLoading method for the UIWebView. Below code will check if the webview is loading and stop it.
if([webView isLoading]) {
[webView stopLoading];
}
EDIT: After re-reading your question, I understood you want to return NO in the request to stop it from beginning to load, so you would do something like:
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
//Check your condition:
if(myCondition == TRUE)
return NO;
return YES;
}
I have been having a rough time trying to open links that a user clicks in a simple web view instead of multitasking and going to safari. It is quite a pain for my users to have to leave the app every time a link is clicked and I know it is probably quite simple but still am having a terrible time making this happen. Here is the code I am using but still when the link is clicked it opens safari.
If anyone can help point me in the right direction I would be greatly appreciative! Thank you!
- (void) handleURL:(NSURL*)url
{
[web loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:#"%#"]]];
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest
*)request
navigationType:(UIWebViewNavigationType)navigationType {
NSLog(#"expected:%d, got:%d", UIWebViewNavigationTypeLinkClicked, navigationType);
if (navigationType == UIWebViewNavigationTypeLinkClicked) {
[UIApplication sharedApplication] ;
return NO;
}
if (navigationType == UIWebViewNavigationTypeLinkClicked) {
[web loadRequest:[NSURLRequest requestWithURL:[NSURL
URLWithString:replyTweetText.text]]];
return YES;
}
}
I'm not sure what this bit does:
if (navigationType == UIWebViewNavigationTypeLinkClicked) {
[UIApplication sharedApplication] ;
return NO;
}
The line [UIApplication sharedApplication]; creates and returns the singleton application instance. You aren't doing anything with it.
Also, both if statements are identical, so only the first will ever be hit and the method returns NO. There is no default returned value, which is bad for a non-void function. Try this instead:
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
return YES;
}
The Facebook connect code is eluding me a bit.
I have no problem doing a login, and a wall post, however, I simply can not
figure out how the delegate methods for the FBDialog andFBStreamDialog is supposed to work.
- (void)postToWall {
FBStreamDialog *dialog = [[[FBStreamDialog alloc] init] autorelease];
dialog.delegate = self;
dialog.userMessagePrompt = #"Enter your message:";
dialog.attachment = [NSString stringWithFormat:#"JSONpost code"];
[dialog show];
}
I adhere to these protocols in my controller:
<FBDialogDelegate, FBSessionDelegate, FBRequestDelegate>
I then implement the two methods:
- (void) dialogDidCancel:(FBDialog *)dialog {
NSLog(#"Failed");
}
- (void) dialogDidSucceed:(FBDialog *)dialog {
NSLog(#"Success");
}
After I tap "publish" and the postToWall methods is done executing the Facebook "pop up" in the UI is empty, except a small "X" in the top right corner and a "F" (facebook logo) in the top left corner.
The UI will stay there until I tap the "X", this results in the dialogDidCancel delegate method being called. The post data is showing up on the Facebook page, everything seems to work.
Why is thedialogDidSucceedmethod never called? I need this to release my facebook controller and restore the UI back to where the user was before "starting" FB Connect.
Thank You:)
Facebook has fixed this issue, as you can see from their post at:
http://bugs.developers.facebook.com/show_bug.cgi?id=10531
I see where the problem is, but not sure what if anything we can do about it. It happens in the UIWebView Delegate method in the FBDialog class. If you click the Skip button, the request.URL is populated with 'fbconnect:success', it should really be 'fbconnect:cancel' but other people have already pointed out this problem out before. Our problem is that when you click the Publish button, the request.URL should read 'fbconnect:success' however, it ends up containing 'http://www.facebook.com/fbconnect/prompt_feed.php', so, it never calls dismissWithSuccess:YES or dialogDidSucceed.
I can't find anyplace where the Publish button's post URL is set, but if we can change it to fbconnect:success, it might work.
FBDialog.m
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request
navigationType:(UIWebViewNavigationType)navigationType {
NSURL* url = request.URL;
if ([url.scheme isEqualToString:#"fbconnect"]) {
if ([url.resourceSpecifier isEqualToString:#"cancel"]) {
[self dismissWithSuccess:NO animated:YES];
} else {
[self dialogDidSucceed:url];
}
return NO;
} else if ([_loadingURL isEqual:url]) {
return YES;
} else if (navigationType == UIWebViewNavigationTypeLinkClicked) {
if ([_delegate respondsToSelector:#selector(dialog:shouldOpenURLInExternalBrowser:)]) {
if (![_delegate dialog:self shouldOpenURLInExternalBrowser:url]) {
return NO;
}
}
[[UIApplication sharedApplication] openURL:request.URL];
return NO;
} else {
return YES;
}
}