I have a problem : I have a simple application with a menu and a link that goes to the web page. The web page is: "soundcloud" it is a site that generates music. for example, if I put on a play music and I return to the menu of my application, the music is still running when I return to the web page, the music is still here but the page is returned to zero. and I want to prevent this. sorry for my english I'm french –
Cordialy
Davy
EDIT: This is assuming that the page is contained in a UIWebView within your app. If it's a link that opens in Safari, I don't believe you are going to be able to block navigation in Safari...but in your own web view you can.
Set the controlling class (whichever view controller contains your web view) as a UIWebView delegate. Then, when you implement the delegate protocol:
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{ //If you want to block ANY navigation
return NO;
//If you want to block refreshes but allow other navigation
if (navigationType == UIWebViewNavigationTypeReload) return NO;
{
Inspired by #Reid Belton's answer
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
//to prevent reloading html if it is already loaded
if( isHTMLLoaded)
{
return NO;
}else{
isHTMLLoaded = YES;
return YES;
}
}
Related
I have a simple app, with only a login page. When the user sing-in, I load a webview running an entire html5 app.
The point is that I would like to capture when the user has decided to logout.
Is there any way to listen when a specific url has been loaded?
If so, when the user press logout and the /logout.html would be loaded and I would have the opportunity of returning the control to the iOS app.
Conform to UIWebViewDelegate in your .h file
Set your delegate of UIWebview
Implement the below method:
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
NSLog(#"URL Request = %#",[[[webView request] URL] lastPathComponent]);
// if (check stringlogout.html) {
// return NO;
// }
// else{
// return YES;
// }
return YES;
}
Check your last component string if it is logout.html then you can do the required stuff and in else you can do what if it is not logout.html action.
Return YES if you want to load the page and return NO if you do not want to load the page.
Good luck with your app...
I have web content inside a UIWebView in my app. My goal is to have all links open normally inside the app, but any links starting with "http://maps", get opened in safari, so they can in turn be opened in the external iphone maps app. If you have a solution for this problem stop reading now, below I'm going to propose my solution. Currently all links are opened inside the app, so http://maps links open to m.google.com inside the app. The solution I'm thinking of involves this code which uses openURL to open all links in safari:
(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
if (navigationType == UIWebViewNavigationTypeLinkClicked) {
\[\[UIApplication sharedApplication] openURL:request.URL];
return false;
}
return true;
}
Obviously the problem with this code is that all links are opened in safari, and I only want map links. Can you suggest a way to parse through links and only pass ones that start with http://maps through the function? Also a more simple question, how do I delegate UIWebView so I can run this code, and also is the viewcontroller.m the right place to put this code?
If you guys could suggest an entire function, including the openURL part above and the link parsing to make sure only maps links get passed through the function that would be awesome. Again, if you have another solution or workaround I would love to hear it. Thanks so much for your help, stackoverflow has been a lifesaver, I'm almost finished with my first project ever!
Try something like this:
-(BOOL)webView:(UIWebView *)inWeb
shouldStartLoadWithRequest:(NSURLRequest *)request
navigationType:(UIWebViewNavigationType)inType {
// let UIWebView deal with non-click requests
if (inType != UIWebViewNavigationTypeLinkClicked) {
return YES;
}
// URL starts with "http://maps"?
if ([[request.URL description] hasPrefix:#"http://maps"]) {
// open URL in Safari and return NO to prevent UIWebView from load it
[[UIApplication sharedApplication] openURL:[request URL]];
return NO;
}
// otherwise let UIWebView deal with the request
return YES;
}
NSString *linkPath = [[request url] path];
if ([linkPath hasPrefix:#""http://maps"]) {
//open in safari
}
else {
//do whatever
}
i have web view in that i am loading pdf file .
pdf file has 2 mb size so it tacking time. i want to add indicator .
for that how can i know my file is loaded in web view ? ...
UIWebViewDelegate
in particular:
- (void)webViewDidFinishLoad:(UIWebView *)webView
James P has the right answer (^'ed), but here is the code to show and hide the indicator.
After you've registered with the UIWebViewDelegate...
- (void)webViewDidStartLoad:(UIWebView *)webView {
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
// Other stuff...
}
And then
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
// Other stuff...
}
Also you probably want to check for failures and hide the activity indicator there as well...
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
// Other stuff...
}
first Add the delegate "UIWebViewDelegate", then you can use the below methods.
– webView:shouldStartLoadWithRequest:navigationType:
– webViewDidStartLoad:
– webViewDidFinishLoad:
– webView:didFailLoadWithError:
You could pull your PDF down using ASIHTTPRequest, which would let you set up a progress bar showing real progress, and then feed it to your UIWebView once it's downloaded.
EDIT: ASIHTTPRequest is a free third-party library that provides a MUCH improved interface to iOS HTTP client functions. LOTS of code samples and instructions here: http://allseeing-i.com/ASIHTTPRequest/How-to-use
I have an embedded website that has many links but the webview window is fairly small to allow for a larger image above the list to be zoomed in and out. I need the webview to respond to hyperlinks into a new controller view with a second embedded UIWebView if at all possible.
The UIWebView has a delegate wich allows you to respond to certain events, e.g. a request to load new content. Just implement the following in your delegate-class
-(bool) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
//You might need to set up a interceptLinks-Bool since you don't want to intercept the initial loading of the content
if (self.interceptLinks) {
NSURL *url = request.URL;
//This launches your custom ViewController, replace it with your initialization-code
[YourBrowserViewController openBrowserWithUrl:url];
return NO;
}
//No need to intercept the initial request to fill the WebView
else {
self.interceptLinks = YES;
return YES;
}
}
I want to disable hyperlinks in UIWebVIew after the initial page loaded without disabling the scrolling feature. That is, I should have user interaction enabled.
You can work with webView shouldStartLoadWithRequest like this:
(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType;
{
NSURL *loadURL = [[request URL]retain];
//change next line to whatever condition you need, e.g.
//[[loadURL relativeString] ....] contains a certain substring
//or starts with certain letter or ...
if([[loadURL scheme] isEqualToString: #"file"])
{
[loadURL release];
return TRUE;
}
[loadURL release];
return FALSE;
}
You also have to set the webViews delegate an object of class where this method is implemented in: [webView setDelegate:my...];
By the implementation above, no url is loaded except those for which the condition is true. At least for the url of the first site it has to be true. The code above works for a web view initially loaded with contents of a file, containing only links to 'http://' or 'https://' or ...