this code works fine , its show activityIndicator loading and hide after loading
but lets say if its on loading stage and then i go back then my apps quit , so how to avoid this
if i go back quickly withiut site fully loaded then it quits ( i think activityIndicator is culprit)
**
- (void)webViewDidStartLoad:(UIWebView *)webView {
[activityIndicator startAnimating];
// myLabel.hidden = FALSE;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[activityIndicator stopAnimating];
activityIndicator.hidesWhenStopped=TRUE;
//myLabel.hidden = TRUE;
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
self.title=#"KKH Website";
[super viewDidLoad];
NSURL *requestUrl = [NSURL URLWithString:#"http://www./index.html"];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:requestUrl];
[aWw loadRequest:requestObj];
}
**
updates
if i link uiwebview delegate to fileowner then its creating isuee , but i need delegate also since i want to show loading
i forgot to release my webview :(
[aWw release];
now its fixed
Related
I have a UIWebView which will load the documents. All the supported documents mentioned for webview it is working. But sometimes , the UIWebView is getting crashed whenever I move back and forth quickly. I mean I am clicking back and opening file again and again. If I do so , my app is getting crashed.
Any idea why this is happening ?? It is working cool for video,audio and txt files, but weird crashing for the Office docs and numbers,pages documents.
Please help me out !!
-(void) backBtnPressed
{
[_webView stopLoading];
if ([_webView superview])
{
[_webView removeFromSuperview];
self.navigationItem.rightBarButtonItem = nil;
}
}
- (void) loadFile:(NSString*)filePath
{
NSURL* url = [NSURL fileURLWithPath:filePath];
NSURLRequest* request = [NSURLRequest requestWithURL:url];
[webView loadRequest:request];
[webView setScalesPageToFit:YES];
}
Set the delegate property of the webview to nil in the dealloc of your controller
If you are moving from one view controller to another, do the following
[webView stopLoading];
webView.delegate = nil;
Implement this and chk what error you are getting.
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
NSLog("Error=%s",error);
}
The problem is solved.Setting the UIWebView to nil and loading the request again in the WebView. But now only at most worst case the App is getting crashed.
Try this :
-(void)viewWillDisappear:(BOOL)animated
{
if([webView isLoading])
{
[webView stopLoading];
}
}
Just adding this here on the off chance that someone else is making the same beginner mistake:
Remember that webView.delegate is a weak reference. If you set it to something else than self your delegate may get destroyed if there are no other references to it, which will cause all kinds of crashes.
Try to do the following. It works for me.
[webView stopLoading];
[webView release];
webView = nil;
webView.delegate = nil;
I use webview in my UIVIewController and load the local HTML file in it using following method.
[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:filePath]]];
If I put this method in ViewDidLoad, I can see white flicking while navigating to my controller that doesn't look good.
I tried putting this method in ViewWillAppear like below. I am using webViewLoaded flag to make sure that webview has been loaded then only show the current view else it waits but it is going in infinite loop of waiting!
- (void)viewWillAppear:(BOOL)animated {
webViewLoaded = NO;
webView.scalesPageToFit = allowZoom;
webView.dataDetectorTypes = UIDataDetectorTypeNone;
webView.delegate = self;
[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:filePath]]];
int count = 0;
while(webViewLoaded == NO)
{
NSLog(#"Waiting...");
[NSThread sleepForTimeInterval:0.1];
if(count++ > 10) break;
}
}
- (void)webViewDidFinishLoad:(UIWebView *)localwebView {
webViewLoaded = YES;
}
I have also tried the same thing in ViewDidLoad but still its going in infinite loop.
Please note that webViewLoaded is "volatile BOOL" but the webview delegate method is not getting called. Not sure what's going on!
Could anyone please help me to fix this. Thanks.
First : You're blocking your main thread and not giving WebView any chance to finish loading. Never block your main thread.
Second : There are two UIWebView delegate methods : webViewDidFinishLoad and webView:didFailLoadWithError: - make sure to listen to both.
If you're trying to wait until WebView completes loading and only show your controller afterwards - use delegation or blocks. Please note that this is not a proper way of doing things - i'm just modifying your example to make it work :
child controller (with WebView) :
-(void)startLoadingWithParent:(id)_parent {
self.parent = _parent;
NSURL * url = [[NSBundle mainBundle] URLForResource:#"resource" withExtension:#"html"];
[webView loadRequest:[NSURLRequest requestWithURL:url]];
}
-(void)webViewDidFinishLoad:(UIWebView *)webView {
[parent showMe:self];
}
-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
[parent showError:error];
}
master controller :
-(void)doSomething {
SecondController * ctrl; /// secondController should be created AND has its view loaded at this point
/// ctrl = [SecondController new];
/// ctrl.view;
[ctrl startLoadingWithParent:self];
/// show user that we're doing something - display activity indicator or something
}
-(void)showMe:(UIViewController*)me {
[self.navigationController pushViewControllerAnimated:me];
}
Try using [NSURL fileURLWithPath:filePath]
use Following code for
[self performSelectorInBackground:#selector(webViewLoaded) withObject:nil];
so that it will not affect your UI
I'm near completing my application, but I'm running into an issue. Obviously, my web view needs an activity indicator for the app to be accepted. I have the following already:
- (void)viewDidLoad
{
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:#""]]]; // I removed the website for privacy's sake
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
Problem is that it won't stop spinning when I need it to (i.e. even after the page is loaded, it doesn't stop)
Any suggestions? Any help is appreciated!
Implement the UIWebViewDelegate in your class file that holds the UIWebView, and insert the following two methods:
- (void)webViewDidStartLoad:(UIWebView *)webView
- (void)webViewDidFinishLoad:(UIWebView *)webView
In the start method, place your:
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
... and in the finish, place:
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
Hope this helps!
In the web views delegate you can do:
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
you need to call
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
to get it to stop
I have a view and a button. When the button is pushed, I present a modal view controller that has a uiwebview, and a navigation bar at the top. The hardcoded uiwebview shows a login prompt. Once the user goes in and enters the correct login credentials and hits GO on the keyboard, I not only need it to authenticate me into the server, but also dismiss the modal view controller.
Note the text field I enter data into is part of the website loaded in uiwebview...
When I hit enter now, the web page authenticates, and everything is peachy, but I just need a way to tie in a
[self dismissModalViewControllerAnimated:YES];
command when they hit GO...any thoughts?
Thanks
EDIT
Here is the code that I am implementing in the loginView:
- (void)viewDidLoad {
[super viewDidLoad];
NSURL *url = [[NSURL alloc] initWithString: #"http://website"];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL: url];
[webView loadRequest: request];
[request release];
[url release];
}
-(BOOL) textFieldShouldReturn:(UITextField *)textField{
[self dismissModalViewControllerAnimated:YES];
return YES;
}
-(IBAction) done{
[self dismissModalViewControllerAnimated:YES];
}
First determine the URL the webpage takes you to on successful login, let's say it's http://website/logedin. Implement UIWebViewDelegate, and detect when a request is made to that address:
- (BOOL)webView:(UIWebView *)wv shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
if ([[request.URL absoluteString] isEqualToString:#"http://website/logedin"]) {
[self dismissModalViewControllerAnimated:YES];
return NO;
}
return YES;
}
you can try with below sample code;
#interface WebViewController : UIViewController {
}
UIWebViewDelegate having few delegate methods, you have to implement it in WebViewController.m (for eg).
-(void) webViewDidStartLoad:(UIWebView *)webView{
}
-(void) webViewDidFinishLoad:(UIWebView *)webView{
-(void) webViewDidFinishLoad:(UIWebView *)webView
}
-(void) webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{
}
Before this, you have to set the delegate for UIWebView from Interface Builder.
I'm using two threads in an iPhone app for the first time and I've run into a problem. In this prototype, I have a view controller that loads a local web page. I want an activity indicator to show until the page has finished loading. With the code below, the activity indicator starts, the page loads properly, but the activity indicator does not stop or hide. It doesn't look like the "loading" function ever gets called.
What am I doing wrong?
- (void)viewDidLoad {
[self.view addSubview:activityIndicator];
[activityIndicator startAnimating];
[NSThread detachNewThreadSelector:#selector(getData) toTarget:self withObject:nil];
[super viewDidLoad];
}
- (void)getData {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
[detailWebView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"page1" ofType:#"html"]isDirectory:NO]]];
[NSTimer scheduledTimerWithTimeInterval: (1.0/2.0) target:self selector:#selector(loading) userInfo:nil repeats:YES];
[pool release];
}
- (void)loading {
if(!detailWebView.loading){
[activityIndicator stopAnimating];
[activityIndicator removeFromSuperview];
}
There's an easier way to do this without creating your own thread.
- (void)viewDidLoad {
[self.view addSubview:activityIndicator];
[activityIndicator startAnimating];
[detailWebView setDelegate:self];
[detailWebView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"page1" ofType:#"html"]isDirectory:NO]]];
[super viewDidLoad];
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[activityIndicator stopAnimating];
}
You 'd betetr stop the activity indicator in the webview delegate method :
-(void)webViewDidFinishLoad:(UIWebView*)webView
Have you added debug output to loading to whether it gets called ? The code sure looks like that, it should get called after 0.5 seconds and I'd guess that detailWebView is still loading then.
Also, GUI stuff should be run on the main thread, so you may need to do:
- (void)loading {
if(!detailWebView.loading){
[activityIndicator performSelectorOnMainThread:#selector(stopAnimating) withObject:nil waitUntilDone:YES];
[activityIndicator performSelectorOnMainThread:#selector(removeFromSuperView) withObject:nil waitUntilDone:YES];
}
}
You're using a webview, which already provides a mechanism to know when a load has finished, and already loads data asynchronously - the use of a custom thread really isn't needed.
Register your object as the UIWebView's delegate. Call loadRequest on the UIWebView and start animating the progress indicator. Stop animating the progress indicator in:
-(void)webViewDidFinishLoad:(UIWebView*)webView
This method is defined by the UIWebViewDelegate protocol - make sure your object implements this protocol. You implement this method:
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[activityIndicator stopAnimating];
}
http://developer.apple.com/iphone/library/documentation/uikit/reference/UIWebViewDelegate_Protocol/Reference/Reference.html