I have a TableViewController with some items, each item when pressed pushes a ViewController with an UIWebView, the ViewController is the same in all cases, but each item asks the webView to load a diferent URL. Now the problem is that the first time I select an item, the webView doesn't load the URL, but if I go back in my navigation controller and then press again any of the items (even the same that the first time), it loads correctly. Why could this be?
This is my code. In my TableViewController I have this inside the didSelectRowAtIndexPath:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *urlAddress;
NSInteger row = [indexPath row];
// SELECT THE URL BASED ON THE SELECTED ROW. SECTION OMMITED FOR CLARITY PURPOSES.
urlAddress = #"http://www.google.com";
[browserViewController refreshUrl:urlAddress];
[urlAddress release];
browserViewController.title = [NSString stringWithFormat:#"%#", [itemsArray objectAtIndex:row]];
MyAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
[delegate.mainNavController pushViewController:browserViewController animated:YES]; }
The browserViewController is initialized in the viewDidLoad method of the TableViewController. In the BrowserViewController implementation I have this method:
- (void) refreshUrl: (NSString *)theUrlAddress{
NSURL *url = [NSURL URLWithString: theUrlAddress];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[webView loadRequest:requestObj];}
But this is the method that seems to be working only from the second time is invoked. If I set a breakpoint on it, I can see it is actually being invoked the first time I press the item on the table, but the loadRequest does nothing.
BrowserViewController is also an UIWebViewDelegate. The webViewDidStartLoad and webViewDidFinishLoad methods aren't being invoked the first time either.
Any ideas of why and how to fix it? Thanks!
you are using refreshUrl on the viewController before it has created its UIWebView.
Use a breakpoint and check the value of your webview. I think it is nil for the first time.
Simply move [browserViewController refreshUrl:urlAddress]; to the line after the push.
Related
In my ipad app i'm not able to get the data in a web view. That web view is in a detail view of splitviewcontroller. That data is coming from a link.
I'm using this code.
In split view table did select row at index path
post=[self.postListMutableArray objectAtIndex:indexPath.row];
PostDetailsViewController *postDetails=[[PostDetailsViewController alloc]initWithNibName:#"PostDetailViewController_Ipad" bundle:nil];
postDetails.detailItem=post.postLink;
In split view detail view
- (void)setDetailItem:(id)newDetailItem
{
if (_detailItem != newDetailItem)
{
_detailItem = newDetailItem;
// Update the view.
NSLog(#"detail Item String is %#",_detailItem);
[self configureView];
}
}
- (void)configureView
{
// Update the user interface for the detail item.
NSString* str =_detailItem;
NSURL* url = [NSURL URLWithString:str];
NSLog(#"URL is ----> %#",url);
self.webView.scalesPageToFit=YES;
[self.webView loadRequest:[NSURLRequest requestWithURL:url]];
//[self.view addSubview:webView];
}
create new Variable at PostDetailsViewController .h class:-
#property(strong,nonatomic)NSString *strGetPostDetail;
and synthesize PostDetailsViewController .m
#synthesize strGetPostDetail
Now you can call splitViewTable Delegate DidSelect method:-
post=[self.postListMutableArray objectAtIndex:indexPath.row];
PostDetailsViewController *postDetails=[[PostDetailsViewController alloc]init];
postDetails.strGetPostDetail=post;
I am trying to learn Xcode by making a simple app.
But I been looking on the net for hours (days) and I cant figure it out how I make a button that open a UIWebView in another ViewController :S
first let me show you some code that I have ready:
I have a few Buttons om my main Storyboard that each are title some country codes like UK, CA and DK.
When I press one of those Buttons I have an IBAction like this:
- (IBAction)ButtonPressed:(UIButton *)sender {
// Google button pressed
NSURL* allURLS;
if([sender.titleLabel.text isEqualToString:#"DK"]) {
// Create URL obj
allURLS = [NSURL URLWithString:#"http://google.dk"];
}else if([sender.titleLabel.text isEqualToString:#"US"])
{
allURLS = [NSURL URLWithString:#"http://google.com"];
}else if([sender.titleLabel.text isEqualToString:#"CA"])
{
allURLS = [NSURL URLWithString:#"http://google.ca"];
}
NSURLRequest* req = [NSURLRequest requestWithURL:allURLS];
[myWebView loadRequest:req];
}
How do I make this open UIWebview on my other Viewcontroller named myWebView?
please help a lost man :D
Well, you've firstViewController already designed and coded, now you've to create secondViewController with a UIWebView binded in IB it self, also it have a setter NSString variable like strUrl that you need to pass at the time of pushing or presenting secondViewController, and assign it to UIWebView in viewDidLoad of secondViewController. See my answer about how to pass a NSString? Also UIWebView has its delegates method (What's delegate & datasource methods? - Apple Doc) Which you can use to handle URL request.
These are the delegate of UIWebView, if you'll going to use it, you need to give UIWebView delegate to self.
- (void)webViewDidStartLoad:(UIWebView *)webView;
- (void)webViewDidFinishLoad:(UIWebView *)webView;
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error;
firstViewController.m
- (IBAction)ButtonPressed:(UIButton *)sender {
NSURL* allURLS;
//get your URL
secondViewControlelr *secondView=[[secondViewControlelr alloc]init];
second.urlToLoad=allURLS;
[self.navigationController pushViewController:secondView animated:YES];
}
secondViewControlelr.h
//declare url and set property
NSURL *urlToLoad;
secondViewControlelr.m
- (void)viewDidLoad
{
myWebView=[[UIWebView alloc]initWithFrame:CGRectMake(0, 0, 320, 460)];
[self.view addSubview:myWebView];
NSURLRequest *urlReq=[NSURLRequest requestWithURL:self.urlToLoad cachePolicy:NSURLCacheStorageNotAllowed timeoutInterval:10];
[myWebView loadRequest:urlReq];
}
I am working on a Universal iOS Application on Xcode 4. It's my first time trying to create an iPhone/iPad app. I am using the Master-Detail Application Template.
This app is roughly a RSS Feed Reader.
I have followed this tutorial to get the big idea: http://cocoadevblog.com/iphone-tutorial-creating-a-rss-feed-reader
I succeed to make the iPhone part working but i have a problem with the UIWebView in the iPad part.
Here is the code which may not be correct.
From MasterViewController ... :
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
if (!self.detailViewController) {
NSDictionary *theItem = [items objectAtIndex:indexPath.row];
DetailViewController *nextController = [[DetailViewController alloc] initWithNibName:#"DetailViewController_iPhone" bundle:nil];
[nextController setDetailItem:theItem];
[self.navigationController pushViewController:nextController animated:YES];
}
}
else {
if (!self.detailViewController){
NSDictionary *theItem = [items objectAtIndex:indexPath.row];
DetailViewController *nextController = [[DetailViewController alloc] initWithNibName:#"DetailViewController_iPad" bundle:nil];
[nextController setDetailItem:theItem];
self.detailViewController = nextController;
}
else {
[self.detailViewController setDetailItem:[self.items objectAtIndex:indexPath.row]];
}
}
}
... to DetailViewController, here is the implementation of setDetailItem: and configureView :
- (void)setDetailItem:(id)newDetailItem
{
if (_detailItem != newDetailItem) {
_detailItem = newDetailItem;
// Update the view.
[self configureView];
}
if (self.masterPopoverController != nil) {
[self.masterPopoverController dismissPopoverAnimated:YES];
}
}
- (void)configureView
{
// Update the user interface for the detail item.
if (_detailItem) {
NSLog(#"webpage creation");
NSString *html = [_detailItem objectForKey:#"title"];
[...html stuff added to html string...]
webView = nil;
webView.delegate=self;
//[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.google.com"]]];
[self.webView loadHTMLString:html baseURL:nil];
NSLog(#"webView loaded");
}
}
I got a blank screen on the detailView pane when i select a row on the MasterView (MasterView/detailView -> in the universal app case, the iPad app is a splitview style App).
I linked the webView in InterfaceBuilder (for both iPhone/iPad .xib files), i received every NSLog, but i cannot make the UIWebViewDelegate answer me even if i implemented it. Of course, the comment with loading the Google Home page doesnt work either.
UPDATE 25/10/11:
I created an new Universal App, a simple one, where i added a UIWebView and i try to load Google webPage.
I can load the page from the viewDidLoad/viewDidAppear (detailViewController) but not from configureView (detailViewController) which is called when i select a row (fire the setDetailItem in detailViewController).
It is like i cannot modify it after loading the panel. There is something I dont get.
(The code I use to launch a webpage is the same code line than the comment above in configureView)
UPDATE 26/10/11
The webView has no value (null) in configureView (when i try to display it for a selected row). I tried this, which is not working but I (obviously/at least) get a value for webView in that case :
- (void)configureView{
if (_detailItem) {
UIWebView *tempWebView = [[UIWebView alloc] init];
self.webView = tempWebView;
NSLog(#"webpage creation");
NSString *html = [_detailItem objectForKey:#"title"];
[...html stuff added to html string...]
//[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.google.com"]]];
[self.webView loadHTMLString:html baseURL:nil];
self.webView.delegate=self;//better to add "self" to get it working
NSLog(#"webView loaded");
NSLog(#"%#",self.webView); //i got this : <UIWebView: 0x6a5a550; frame = (0 0; 0 0); layer = <CALayer: 0x6a59750>>
}}
By writting "self.webView.delegate=self;" i got the delegate answering me. However this one produce two answers (??) like if there were two webView running ?:
2011-10-26 10:49:57.089 APPName[18334:f803] didStart Loading web Page
2011-10-26 10:49:59.416 APPName[18334:f803] didStart Loading web
Page
2011-10-26 10:49:59.523 APPName[18334:f803] finished loading web
page
2011-10-26 10:49:59.806 APPName[18334:f803] finished loading
web page
I finally got it working.
However, the only solution i've found is to create another project with STORYBOARD and not xib files, which was I guess the problem.
So i dont really have the answer for my problem, but i guess it is for sure a problem of link in the xib files. But i didnt find it.
With Storyboard, I worked out the iPad version easily, but not the iPhone version... until I found the good tutorial : http://www.youtube.com/watch?v=NHIOx_1mz-Q
So for the Storyboard, i deleted the tableview section (inserted by default) and put this code :
MasterViewController
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
NSLog(#"SELECT ROW IPHONE");
if (!self.detailViewController){
NSDictionary *theItem = [items objectAtIndex:indexPath.row];
DetailViewController *nextController = [self.storyboard instantiateViewControllerWithIdentifier:#"Detail"];
[nextController setDetailItem:theItem];
[self.navigationController pushViewController:nextController animated:YES];
}
}
else {
NSLog(#"SELECT ROW IPAD");
self.detailViewController.detailItem = [self.items objectAtIndex:indexPath.row];
}
}
DetailViewController
- (void)configureView{
// Update the user interface for the detail item.
if (self.detailItem) {
self.detailDescriptionLabel.text = [self.detailItem description];
self.webView.delegate=self;
NSString *html = #"";
[...html stuff...]
[self.webView loadHTMLString:html baseURL:nil];
}
}
I dont mention it, but i also created and linked webview of course.
If someone find the answer for the xib version of a simple project with TableView linked to a detailView for iPad (on Universal iOS project), i would like to ear it.
I don't know if this will fix your problem completely, but at least this line is suspicious:
webView = nil;
It looks to me like you are setting the webView to nil just before you set the delegate? If it is nil at that point, there is no way that the delegate is going to be set. In fact, when you try to send it any messages, it will just ignore them.
(Also that may be leaking memory.)
A split view controller must always be the root of any interface you create.
The panes of your split-view interface may then contain navigation controllers,
tab bar controllers,…
the split view controller automatically handles most of the rotation behaviors
And we can’t use UISplitViewController inside TabBars !!
how to initialise my detail view with webview when a table row get selected in master view...
any example or any method to solve this problem....
Thanks in advance..
initialize one UIWebview in Detailview('s loadview) and Keep it as hidden. If a row is tapped on master controler then pass that URL to UIWebView and make it as Visible.
All the best!!
in TableView method didSelectRowAtIndexPath:
if (indexPath.row == 0) {
NSURL *urlStrg= [NSURL URLWithString:#"http://www.google.com"];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:urlStrg];
[self.detailViewController.detailItem loadRequest:urlRequest];
}else if(indexPath.row == 1) {
//do something else here
}
I have one view holding a list of videos(buttons which can be clicked, each hold a url) which currently bring up a new view which holds the UIWebview, the only problem is I cant pass the url to the webview depending on which button was clicked.
At the moment I just get an empty UIWebview.
How can the url string be passed to the webview so it can load the correct url for each button?
Regards
NSURL *videoURL = [NSURL URLWithString:#"http://..."];
[webView loadRequest:[NSURLRequest requestWithURL:videoURL]];
UPDATE:
In response to comment #3, here's what you can do:
This goes without saying, but keep a reference to the UIWebView instance in Browser
Add an NSString or NSURL #property to Browser
Pass the URL to the Browser instance right after init
In viewDidLoad:, call loadRequest:
So your code might look like this:
- (void)buttonClicked {
Browser *browser = [[Browser alloc] initWithNibName:nil bundle:nil];
browser.URL = [NSURL URLWithString:#"http..."];
[self presentModalViewController:browser animated:YES];
[browser release];
}
and in Browser's viewDidLoad:
- (void)viewDidLoad {
[super viewDidLoad];
[webView loadRequest:[NSURLRequest requestWithURL:URL]];
}