I load a webpage in a uiwebviewcontroller，after click one link, it will pop a popovercontroller, is it possible to get this controller in my code?
Actually, this popovercontroller is not created by my code. The html detect the webpage is loaded by iDevice and pop this. That means, if I use safari to open webpage, it also will display this popovercontroller.
Thanks.
implement the UIWebView delegate method.
-(BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSURL *url = request.URL;
NSString *urlString = url.absoluteString;
if([urlString isEqualToString :#"abc.com") // link on which want to open popoverview
{
UIPopoverController itemPopover = [[UIPopoverController alloc] initWithContentViewController:viewController];
[itemPopover presentPopoverFromRect:customCell.addImage.bounds inView:webViewpermittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
return NO; //if wanted to load the link on UIWebview return YES else return NO
}
return YES;
}
Related
I'm trying to make it so that the back button will only be enabled when the user presses a link and/or if canGoBack = TRUE. I tried using an if statement in the body but that didn't work. I then tried using what I could find online and it still didn't work. My code is below. What am I doing wrong? Thanks!
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest: (NSURLRequest *)request navigationType: (UIWebViewNavigationType)navigationType{
if (navigationType == UIWebViewNavigationTypeLinkClicked)
{
NSString *url = webView.request.URL.absoluteString;
NSURL *nsurl = [NSURL URLWithString:url];
NSURLRequest *nsrequest = [NSURLRequest requestWithURL:nsurl];
[webView loadRequest:nsrequest];
backButton.enabled = TRUE;
}
return TRUE;
}
shouldStartLoadWithRequest() won't get called if you haven't set the web view's delegate.
In order to use UIWebView its typically set as an outlet property of a view controller, so you should have something like this:
IBOutlet UIWebView* webView;
The webView has a delegate property which needs setting to your view controller, you can set delegates in a storyboard, but its more explicit to set it in code:
- (void)viewDidLoad
{
[super viewDidLoad];
self.webView.delegate = self;
99% of the time you just set delegates, but UIWebView's delegate is funny in that it needs setting to nil when finished with. So add this:
- (void)viewDidUnload
{
[self.webView stopLoading];
self.webView.delegate = nil;
UIWebView and WKWebView both have a canGoBack and canGoForward property on them. You can use KVO to see when these are enabled, and enable/disable your back and forward buttons accordingly.
http://nshipster.com/key-value-observing/
I have a ViewController with uiwebvew. This is called to show the webcontents.
My problem is , if the webcontent has links, I want to show that link page in the another instance of same ViewController.
So far I'm unable to do so. I guess I'm missing something here.
Could anyone point my problem here.
Thanks in advance.
-(BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {
if (navigationType == UIWebViewNavigationTypeLinkClicked) {
PageDetailsViewController *pdvc = [self.storyboard instantiateViewControllerWithIdentifier:#"PageDetails"];
NSURL *websiteUrl = [NSURL URLWithString:#"http://www.google.com"];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:websiteUrl];
[pdvc.webview loadRequest:urlRequest];
[self.navigationController pushViewController:pdvc animated:YES];
return NO;
}
return YES;
When I try to load in same viewcontroller, it's fine it loads. So, my guess is , there may be something wrong with my webview delegate or navigationcontroller.
Any ideas??
pdvc.webview will be nil because its view has not been loaded at the time you're trying to reference it. You should pass the URL to pdvc, and let that controller load its web view in viewDidLoad.
I'm removing content of the webView in the webViewDidFinishLoad. The problem is it first loads the page and shows all the content and then you will see the content I'm removing disappear. I would like it so that the user doesn't see anything disappear so the content should never been shown to the user.
This is my method :
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
NSString* script = [NSString stringWithFormat:#"document.getElementById('menu').style.display='none';"];
[self.webView stringByEvaluatingJavaScriptFromString:script];
NSLog(#"gets");
}
The trick is use of isLoading property.
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
if(!webView.isLoading){
//Has completely stopped..
}
}
Use webview.hidden = YES till the time you dont want to see the data and then set it as no again
You can use the UIWebView Delegate methods as shown below.
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
webView.hidden = YES;
return YES;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
webView.hidden = NO;
}
Isn't the same thing work in viewDidLoad ?
-(void)viewDidLoad{
NSString* script = [NSString stringWithFormat:#"document.getElementById('menu').style.display='none';"];
[self.webView stringByEvaluatingJavaScriptFromString:script];
NSLog(#"gets");
}
I have this method that goes back to previous webpage in a web view under certain circumstance and it works fine. However, I want to implement a function that checks if I am on the original web page and if so, when I push the back button it takes me to a navigation view controller. The original page is this code [webView loadHTMLString:self.item.description baseURL:[NSURL URLWithString:self.item.link]];. Now I need to figure out how to check if I am on that page and if so I need to execute this code: [self.navigationController popViewControllerAnimated:YES];. Any help will be appreciated.
- (void)back
{
if ([webView canGoBack]) {
[webView goBack];
} else {
[webView loadHTMLString:self.item.description baseURL:[NSURL URLWithString:self.item.link]];
}
}
You can use the delegate method shouldStartLoadWithRequest of UIWebViewDelegate to check what contains in the url. if you find it then just go NavigationController
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {
if ([[request.URL absoluteString] rangeOfString:#"http://yourURL"].location!=NSNotFound) {
[self.navigationController popViewControllerAnimated:YES];.
}
}
You need to add
<UIWebViewDelegate>
to the header. Then set webView.delegate to yes;
Once you have it set as a delegate, then you can get the absoluteString and the requestURL, and override the method. With the absoluteString you can check for a substring, text, domain, basically anything you want! You override shouldStartLoadWithRequest or webViewDidFinishLoad:
-(void)webViewDidFinishLoad:(UIWebView *)webView
-(void)shouldStartLoadWithRequest :(UIWebView *)webView
That calls everytime any webpage is loaded.
I am a real noob in ios dev. Now i am working on my study project using Zxing.
I make my own project which included dependency third party libraries(Zxing).
Once I scan QRCode which contains with a URL inside, my project will call a class in Zxing library then alert an alertView.
After that, once I click open button on pop-up alertView, it would open that URL by activating Safari.
the code in Zxing looks like this:
//============================================================
- (void)openURL {
[[UIApplication sharedApplication] openURL:self.URL]; //<===== open URL by Safari browser.
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex != [alertView cancelButtonIndex]) {
// perform the action
[self openURL];
}
}
//========================================================
However, my wish is I would like to open that URL in my own webView which constructed by Interface Builder in my "own project" NOT by Safari. Do you have any suggestions? What I have to code in (void)openURL {} ? I got stuck with this issue for 3 days and I now seem to be crazy [p]
Thank you very much for your advance help.
Cheers,
What i did to do this is that I make a new view controller which has webView in it. A property URLstring which get set when the OpenURL method starts. You have to implement delegate methods of webView if you need. The code that I am using is
in WebViewCOntroller.h
#interface WebViewController : UIViewController <UIWebViewDelegate>{
IBOutlet UIWebView *webView;
UIView *activityView;
}
#property (nonatomic, retain) NSString *buyProductLink;
#end
in WebViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
webView.scalesPageToFit = YES;
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:self.buyProductLink]];
[webView loadRequest:request];
[request release];
}
- (BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
return YES;
}
- (void) webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
[activityView removeFromSuperview];
}
- (void) webViewDidFinishLoad:(UIWebView *)webView {
[activityView removeFromSuperview];
[activityView release]; activityView = nil;
}
In openURL method use
WebViewController *webViewVC = [[WebViewController alloc] initWithNibName:#"WebViewController" bundle:nil];
webViewVC.buyProductLink = [NSString stringWithFormat:#"%#",result];
[self.navigationController pushViewController:webViewVC animated:YES];