iOS 8.1, XCode 6.1, Storyboards and 2 UIViewControllers that look like this:
The view on the left is the main view, the view on the right is a UIWebView that will show help information written in HTML. My problem is that when I tap on the blue circle with an 'i' in it, it is supposed to go to the 2nd view controller (which it does) and display the html for that language (which it doesn't do)... all I get is a black screen! Here is my code to display the html file contents:
-(void) viewWillAppear:(BOOL)animated {
NSURL *indexURL;
NSString *sysLangCode = [[NSLocale preferredLanguages] objectAtIndex:0];
// do we support this language?
if([sysLangCode isEqualToString:#"en"] || [sysLangCode isEqualToString:#"de"] || [sysLangCode isEqualToString:#"it"] ||
[sysLangCode isEqualToString:#"es"] || [sysLangCode isEqualToString:#"fr"] || [sysLangCode isEqualToString:#"ja"] ||
[sysLangCode isEqualToString:#"zh-Hant"] ) {
indexURL = [[NSBundle mainBundle] URLForResource: [NSString stringWithFormat:#"instRST-%#", sysLangCode]
withExtension:#"html"]; // contatenate the language code to the filename
}
else
indexURL = [[NSBundle mainBundle] URLForResource: #"instRST-en" withExtension:#"html"]; // make 'en' the default
NSLog(#"\n\nmainBundle: %#",[NSBundle mainBundle]);
NSURLRequest *request = [NSURLRequest requestWithURL: indexURL];
NSLog(#"\n\nhtmlURL: %#",indexURL);
[self.webView loadRequest:request];
}
- (void)viewDidLoad {
[super viewDidLoad];
[webView setDelegate:self];
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
NSLog(#"Failed to load with error :%#",[error debugDescription]);
}
UPDATE This is the connection for the webView:
I have tried different scenarios for hours now, and have given up doing this on my own. Can someone please tell me what I'm doing wrong?
Since you are using a storyboard you must use a Segue to present your ViewController. Delete your button action implementation and Control+Drag from your button onto your Help view controller. Link it to the Show segue.
i also face the same issue, below webview property helps me to avoid black screen problem
[self.web setOpaque:NO];
Related
I want to create custom back button on each page in my iOS web-view (objective-C). Can anyone please suggest me how to implement.
Thanks in Advance
I am new to iOS Web-view that is why I posted directly what I want this is my code :
#import "ViewController.h"
#interface ViewController () <UIWebViewDelegate>
#end
#implementation ViewController{
__weak IBOutlet UIImageView *logoImage;
}
- (void)viewDidLoad {
[super viewDidLoad];
self.webView.delegate = self;
NSString *urlString = #"https://www.anything.com";
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:requestObj];
self.webView.hidden = YES;
if ([_webView canGoBack]) {
[_webView goBack];
}}
- (void)webViewDidStartLoad:(UIWebView *)webView {
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
self.webView.hidden = NO;
logoImage.hidden = YES;
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
NSLog(#"%#", error);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
I am passing a url of my website and I want to show a back button on every page of my application so that user can go to previous page. I have one more issue that whenever I minimise my application and opens it back from recent apps it get restarted while I want it to be resumed from the same screen
For the UIWebView, check the method - (void)goBack; out.
For the WKWebView, check the method - (WKNavigation *)goBack; and - (WKNavigation *)goBack:(id)sender; out.
UPDATE
// init the back button
[btnBack addTarget:self action:#selector(backButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
- (void)backButtonTapped:(id)sender
{
[self.webview goBack];
}
Assume you have set up your webview and back button (in the navigation bar or somewhere else) in the full code.
The browser could go back when the current (tab) page has a history list and the current page url is not the first and last one.
Make sure you really want to goBack in viewDidLoad, it needs some time to finishing loading the target page you specified (https://www.anything.com) just like you do it in a browser.
The method loadRequest of webview is asynchronous, it pushes the url request to webview and returns it immediately.
Bind the webview's goBack method to your custom back button like the above code snippets.
Try to click a sample link in the initial page (https://www.anything.com), once the new page finishes loading, it could be able to goBack with satisfying [self.webview canGoBack].
Make a breakpoint in the implementation of method backButtonTapped, if needed.
Drop the logoImage or other unrelated code issues in your next question, that makes your question more clear and helpful.
Hi friends,
I am getting data from server when user post a link on his timeline am displaying like this but my requirement is when i click Title then it will open browser. How can i do this?
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:#"http://www.stackoverflow.com"]];
Will open a URL by the Application defined for the scheme. http has Safari as default (I guess)
To open it in the App itself create a ViewController + xib,
add a UIWebView to your View
& Buttons to get back to the app.
Then you can create an instance of your new ViewController and present it with
[self presentViewController:WebVC animated:YES completion:^(void){
[[WebVC MyWebView] loadRequest: [NSMutableURLRequest requestWithURL:[NSURL URLWithString: #"http://stackoverflow.com"]];
}];
e.g.
To make it even easier you could add a function to your ViewController like this one
-(void) LoadUrlFromString: (NSString *)url{
[self.MyWebView loadRequest: [NSMutableURLRequest requestWithURL:[NSURL URLWithString: url]]];
}
and then just do as before but call
[WebVC LoadUrlFromString:#"http://stackoverflow.com"];
on completition
You can use TTTAttributedlabel
TTTAttributedlabel *title_lbl = [TTTAttributedlabel alloc]init] //Make it an instance of TTTAttributed label what you are using for displaying the Title.
NSRange range = [title_lbl.text rangeOfString:"YOUR_TILE_HERE (Latest bollywod and hollywood.....")"];
[title_lbl addLinkToURL:[NSURL URLWithString:#"YOUR_URL_HERE (www.bollywood.com)"] withRange:range];
title_lbl.delegate = self;
And for onlcick method
- (void)attributedLabel:(TTTAttributedLabel *)label didSelectLinkWithURL:(NSURL *)url
{
NSlog("%#",label.text);
[UIApplication sharedApplication] openURL:url];
}
In my window controller, I have this:
- (void)windowDidLoad {
[super windowDidLoad];
NSLog(#"webView = %#", webView);
[[webView mainFrame] loadRequest:
[NSURLRequest requestWithURL:
[NSURL URLWithString:#"http://www.apple.com/"]]];
}
My understanding is that should make the webView in my window now download and render Apple's home page. But all I see in a white panel. What am I missing?
(I've checked that webView is not null; NSLog shows something like
"webView = <WebView: 0x10be7c3b0>")
I've also tried the more modern approach, but still had no success:
[webView setMainFrameURL:#"http://www.apple.com/"];
As this project is sandboxed, the solution in this case was to add the relevant entitlement to the project.
I found this thread which matches my problem: Clicking a link in UIWebView pushes onto the NavigationView stack
However, the following situations are different:
Instead of using a navigationController, I am using a View Based application to manually switch to different viewcontroller when corresponding buttons are pressed.
Rather than using links I am using onClick method to detect when a user clicks on something on a UIWebView and trying to open a new ViewController with a new UIWebView.
Will the same code work or do i have to make some changes?
You will have to do some modifications
1st:
when onClick, you will have to redirect your current page to a new location
This location for example will be MYLocation://GoThere
2nd:
Update the shouldStartLoadWithRequest
-(BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {
NSURL *url = request.URL;
NSString *urlString = url.absoluteString;
//Check if special link
if ( [ urlString isEqualToString: #"MYLocation://GoThere" ] ) {
//Here present the new view controller
MyViewController *controller = [[MyViewController alloc] init];
[self presentViewController:controller animated:YES];
return NO;
}
return YES;
}
I think you may use the shouldStartLoadWithRequest as Omar posted.
If the new viewcontroller has a webviewcontroller, then you should pass the url (or even the request) to the new viewcontroller to show the clicked URL.
I'm working on an app that uses a UIWebView to display its help files. The webView lives in it's own view, DocViewController...when its called the
- (void)viewDidLoad {
method uses
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:docPage ofType:#"html"]isDirectory:NO]]];
to load the proper doc page. However, once the first page is loaded, the view becomes static and new pages aren't loaded when the docPage changes and the view is toggled. Is there a way to clear the webView so new pages load when requested?
Edit:
The first answer is confusing to me. As is the routine below works. It's just that it only works once. After the view is loaded the first time it does not change when this view is toggled on again and the requested html page is different. The view always displays the first html page requested and will not load new requests.
- (void)viewDidLoad {
docPage = [NSString stringWithFormat: #"%d", hexpage];
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[NSBundle mainBundle] pathForResource:docPage ofType:#"html"]isDirectory:NO]]];
}
viewDidLoad is only called once, unless the view is released and needs to be reloaded. This occurs usually only when the view controller receives a low memory warning. Instead of viewDidLoad, try putting that code in viewWillAppear:, which gets called every time the view will show on the screen.
Try using
- (void)loadHTMLString:(NSString *)string baseURL:(NSURL *)baseURL
passing an NSURL object to the dir that contains your HTML as baseURL and loading the HTML string with something like
NSString *path = [[NSBundle mainBundle] pathForResource:#"myfile"
ofType:#"html"];
NSString *html = [NSString stringWithContentsOfFile:path
encoding:NSUTF8StringEncoding
error:nil];
Edit:
Also, make sure that your hyperlinks are not trying to open in a new window with something like target="_blank", your webview will not open those