I have an application that shows presentations that are composed by pages.
Those pages can contain some kinds of media, and one of them is HTML, wich uses an UIWebView component as viewer.
What I need is some way to insert some kind of link into the HTML document so I can jump to another page of my application presentation.
In my research I have found that subclassing UIWebView is not recommended, so I have no clue of how I should handle this.
Many thanks in advance.
Provide:
-webView:shouldStartLoadWithRequest:navigationType:
in your app delegate (ref here).
It will be called each time the web view is about to load new content and give you the chance to do what you need. E.g., this would work if you embed a "file://" kind of URL in your web page:
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {
if ([[[request URL] scheme] isEqual:#"file"])
return YES;
...
Related
Right now I am developing a macOS WebApp, this includes a WKWebview.
However, when I want to upload or download a file, it doesn't work. When I click, nothing happens! Like, nothing. I click on for example on “choose file” or any other upload button, and the window that should appear to select a file or directory doesn’t show up.
I have been struggling all day long, checking stackoverflow and many other resources and I found many posts related to my problem, but they are all out-dated.
My code is really simple;
- (void)viewDidLoad {
[super viewDidLoad];
// Load the url into the webview
NSURL *url = [NSURL URLWithString:#"https://www.my-website-url.com"];
[self.myView loadRequest:[NSURLRequest requestWithURL:url]];
}
So basically all I want is that I can download and upload files to and from my WKWebView.
It is NOT a duplicate question because I still don't get how to implement the code that Willeke is referring to in the comments.
Using the new iOS 9 feature - Universal links, from my understanding, is supposed top open my app whenever a specific domain is opened in browser (or other apps?). I have gone through the documentation and through this guide.
However, when the app opens I do not receive the parameter that is meant to help me open the correct page for the user to view....
I would share the code I'm using, but it's quite a big infrastructure and not really a couple of lines of code (server side JSON, plist rows and some IDs on the developer portal).
Anyone encountered it and could give me a hand here, please?
The Branch guide you linked to (full disclosure: I work with the Branch team) unfortunately doesn't cover a rather important step: what to do after your app opens. Which is exactly the issue you're encountering :). But the good news is you've already done the hard part with all the server and entitlement config.
What you need to complete the loop is a continueUserActivity handler in your AppDelegate.m file. This will pass you a webpageURL property containing the actual URL of the Universal Link that opened your app, which you can then parse and use for routing. It'll look something like this:
- (BOOL)application:(UIApplication *)application continueUserActivity:(NSUserActivity *)userActivity restorationHandler:(void (^)(NSArray *))restorationHandler {
if ([userActivity.activityType isEqualToString:NSUserActivityTypeBrowsingWeb]) {
NSString *myUrl = [userActivity.webpageURL absoluteString];
// parse URL string or access query params
}
return YES;
}
Also, when testing keep in mind that Universal Links unfortunately don't work everywhere yet:
P.S., gotta ask...since you found the Branch blog already, had you considered using the service to handle the link routing for you? It can definitely help simplify things!
I have an NStextView that loads a description from a JSON source. The NSTextView loads a different string every time the user clicks a button. These descriptions sometimes have a URL in them which is rendered as plain text and not as a clickable URL. It loads just fine, it's just that URL's aren't recognized. I've set up automatic link detection to no avail. I also tried AttributedString which didn't work, but that may be my incompetence (new to this.)
Here's the code:
if ([firstCommenter isEqualToString:playerID]) {
NSString *commentBody = [[allComments objectAtIndex:0] valueForKeyPath:#"body"];
[shotDescriptionTextView setString:commentBody];
}
Refer Automatic Link Detection in an NSTextView. Hope helpful
For even better solution without need of any category look here
TL;DR:
[shotDescriptionTextView setEditable:YES];
[shotDescriptionTextView checkTextInDocument:nil];
[shotDescriptionTextView setEditable:NO];
I need to take an existing pdf file and programmatically fill in a list of form fields with text and then save the pdf without ever displaying it to the user.
For instance, if the pdf file contains fields named "LastName", and "FirstName" I would like to set the value of "FirstName" to "Louis" and then save the file.
I've been searching for a long time and can't find any guidance on even where to start since the iOS documentation (and most of the questions on here) seem geared towards displaying or creating pdf content instead of modifying it.
EDIT:
My main question is: Is it possible to open a pdf stream (I know how to do this) and copy each existing pdf dictionary item into a new pdf? I have not been able to find a way to write the dictionary items to a pdf.
I doubt that kind of functionality will ever be in the iOS frameworks. The reason most of the related info you can find "seem[s] geared towards displaying or creating pdf content instead of modifying it" is because that's what the vast majority of use cases will want or need for PDF functionality.
You'll need to find a 3rd party library that can open up PDFs, fill out the AcroForm fields, and then stamp out a PDF. I use iText on Java (there is also iTextSharp for C#) but I don't know of anything for Objective-C.
Once you find that library, you'll need to integrate it into your project. There are undoubtedly several related questions/answers here on SO for whatever version of the SDK you're using.
This would be easier to do with a HTML page. If you wish to use a HTML page instead of a .pdf form then thius is how you would go about doing it:
[field1 setText:#"Field 1 Text"];
[field2 setText:#"Field 2 Text"];
NSString *result;
result = [webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:#"$('#field1').val('%#');", field1.text]];
result = [webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:#"$('#pfield2').val('%#');", field2.text]];
result = [webView stringByEvaluatingJavaScriptFromString:#"$('#submitbutton').click();"];
You would need to create two UILabels or UITextFields and call them "field2" and "field2" in your .h file. You can then find the ID of the field you need to replace e.g. #field1 and then put it where I have put "#field1" and again for the second field where I have put "#field2". There also needs to be a UIWebView with the page already loaded. This code is to be used after the UIWebView page has been loaded. Maybe do the following:
-(void)webViewDidFinishLoad:(UIWebView *)webView {
// Insert above code here
}
You probably need a full understanding of Javascript if you want to do this for the whole form, but this should get you started.
Hope that helps you.
I am using iOS 4.3 & was wondering if there is any way that I can access the Safari's "Reader" feature through which webpages are removed of ads & other riff raff & the content takes the center stage.
If one opens any article in Safari (on say Wikipedia website), then a "Reader" button appears on the URL bar. Clicking on it presents a new window presenting the content beautifully.
How can I leverage this this functionality in iOS through UIWebView ?
PS: I know there is something called Readability Project. But I have no idea how to use this through UIWebView. Also for some websites Safari's Reader takes a call not to enable "Reader" feature, maybe it has no sufficient confidence?
Important: THIS ANSWER NO LONGER WORKS!
Readability shut down on September 30, 2016.
Here is something they recommend as a replacement:
https://mercury.postlight.com/web-parser/
Keeping the answer as a historical reference
--- Original answer ---
You can use Readability mobilizer for this. You will get a cleaned up version of any article, in the Readability styling:
http://www.readability.com/m?url=http://{URLOFTHEARTICLE}
Just prepare the URL and load it in your UIWebView. Here is how it looks in action:
http://www.readability.com/m?url=http%3A%2F%2Fwww.cnn.com%2F2013%2F01%2F11%2Fshowbiz%2Ftv%2Fgolden-globes-tv-vineyard%2Findex.html%3Fhpt%3Dhp_abar
Apple is making a pretty big deal about the inclusion of "Reader" in iOS 5. I'm assuming by the noise it's not available in 4.3
re: How to use through UIWebView
I can't find any mention of it in the Web Content Guide.
There's nothing about it in the UIWebView class reference.
And there's nothing in QA1630.
Dont parse HTML natively on iOS, I have done it before and its a messy business. Either create your own web service to do all the nasty work or look into using readability (readability.com) they provide an API.
There is also an open source ruby, python and php readability port that you can find here
https://github.com/iterationlabs/ruby-readability
https://github.com/gfxmonk/python-readability
http://code.fivefilters.org/p/php-readability/source/tree/master/
For you ruby enthusiasts, readability is also available as a gem, just google it.
Actually reader button do a bit of analysis where it parse the HTML Page and then it sees a clear body tag to parse. If that plugin is able to extract the exact body it will enable the reader button (My understanding from the readability source code). Now to implement the same for webview you just need to embed java script in your code (this java script is already available in the readability source code) and then you can achieve the same effect.
But I suspect the future plan from apple for the same. Because they can not just let anyone else do this content extraction with the huge business opportunity associated with iCloud with the combination of readability.
If you want you can simple extract the HTML from UIWebView and then extract the body and use it for your purpose. It's not a very rocket science to extract.
For analysis point of view, just have randomly some 10 HTML pages with Reader button enabled, you will see the core cotent belongs to body only and rest of the add, header, footer are separated.
I believe this is the time to re-invent the web content we use, and this is the perfect example of doing the same.
You can even do this by injecting javascript.
#define readJS #"(function(){window.baseUrl='https://www.readability.com';window.readabilityToken='';var s=document.createElement('script');s.setAttribute('type','text/javascript');s.setAttribute('charset','UTF-8');s.setAttribute('src',baseUrl+'/bookmarklet/read.js');document.documentElement.appendChild(s);})()"
And then when your webpage finishes loading
- (void)webViewDidFinishLoad:(UIWebView *)webview
{
[webview stringByEvaluatingJavaScriptFromString:readJS];
You can do it in iOS9.
first import SafariServices:
#import <SafariServices/SafariServices.h>
Afterwards we are instantiating SFSafariViewController and adding it as a subview. We have two options doing so:
Creating with only base URL
Creating with bas URL as well as entering 'Reading Mode' in case it is available
NSString *sURL = #"http://google.com";
NSURL *URL = [NSURL URLWithString:sURL];
SFSafariViewController *safari = [[SFSafariViewController alloc] initWithURL:URL]; // 1.
SFSafariViewController *safari = [[SFSafariViewController alloc] initWithURL:URL entersReaderIfAvailable:YES]; // 2.
[self presentViewController:safari animated:YES completion:nil];