I implemented File Provider for new Files app on iOS 11. I want to show my files on remote, in Files app. I can enumarete items and show in Files app but iOS shows default thumbnail for images. So I need to show my own thumbnails for images.
fetchThumbnailsForItemIdentifiers:requestedSize:perThumbnailCompletionHandler:completionHandler:
Apple explain this method like following;
For local files, the system automatically provides thumbnails for
supported content types, and calls a Quick Look Preview extension to
get thumbnails for custom types.
However, the system cannot generate thumbnails for remote items.
Instead, it calls this method to request thumbnails for items stored
on a remote sever.
I implemented that method and make api call for the thumbnails. But that method is not called so i cannot show my own thumbnails for the images.
Why this method is not called? Is there anyone have an idea about that?
Thanks.
Seems you need to update the item's(ProviderItem) versionIdentifier property for the method to get called.The Apple documentation states that too. Was stuck in the same situation ;-)
Hope this helps!
Related
I've got an 'interactive PDF' that I need to be able to edit and save in an iOS app and I'm looking at how to achieve it. It's got text boxes and radio buttons which I can interact with in the UIDocumentInteractionController preview (or QLPreviewController) but there doesn't seem to be a way to save those changes to the file that was loaded and if I share the live and edited file to my mac via AirDrop it doesn't send the changes, rather it seems just the original file.
I don't really know anything about interactive PDFs so not sure how added text would normally be saved. I've found that the 'Files' app (added in iOS 11) actually saves the edits you make, so that's basically what I want to be able to do.
At the end of the day I just need a way to be able to interact with a PDF in my app and save the changes. Do I maybe need to use a custom PDF viewer rather than trying to piggy back off the standard iOS file previewer functionality?
Looks like this library solves my problem: https://github.com/derekblair/ILPDFKit
It lets you edit a PDF, access and set individual fields and save out as a static PDF.
I have been told this is possible to do but cannot get this to work.
Basically I am trying to cache and image using forge.file.cacheURL()
Now I can get the file just fine and display it in the page by creating a new Image object but what I want to do is use this cached image to change the image in the topbar.
When ever I try to do it I get an error saying "file not found" and after reading the docs a little more it seems that trigger may have "src/" coded into the class because if I put just "image/logo.png" the logo.png will show up in the header because its part of the app package.
I guess the question is.. Is my assumption correct?
Thanks!
The native UI elements (topbar/tabbar) load images directly from your apps package, not through a URL in the same ways images are shown in the webview.
What this means is that currently you can only use images included in your app in the topbar/tabbar modules.
in case anyone is interested in this, the ability was added a while ago to the API so you can now use a cached image or filesaveURL feature of forge to change the header image dynamically.
I need to individualize documents within an iOS-App. I could provide the origin-documents as DOCX, PDF, PPT etc. The output-format has to be PDF.
My minimun requirement is to fill some text-fields. Nice to have would be to replace an image, too.
I´m quite used to generate PDFs programmatically using UIGraphicsBeginPDFContextToFile etc. But in my current case I don´t want to create the whole document programmatically, I just want to replace some content.
Any hints / tipps?
Thank you in advance.
DOCX is a zip - format file so you can process the contents programmatically and the reconstruct the zip file. PPT is a binary format though newer versions of PowerPoint might also construct zip-oriented versions that you can programmatically process. You mentioned though that you need don't want to programmatically process these documents - which I would probably also do only as a last resort.
For your DOCX origin/source documents (or doc,odt,rtf but not ppt/pdf) you could use Docmosis cloud services if your app can have the external dependency. You would upload your DOCX origin documents with placeholders for text-fields or images as a one-off/occasional task. Your iOS app then calls Docmosis sending instructions and data to create the output PDF and either stream it back to the app or email/store it or both.
The upside is it takes all the load and coding away from the iOS application (there is an SDK). The downside is it is an external depdendency. Please note I work for the company the created Docmosis.
Hope that helps.
Why not just load a page in a webView modal that points to a URL of a page you create? The main parts of the page would be static, and then the fields you need to customize would be populated via Javascript or PHP.
For example, we have a contact form in our app that gives you an option to view the details of your completed form after you submit. When the user clicks on the button to view the Contact Confirmation, it loads example.com/confirmation.php in a modal view within the iOS App.
On the confirmation.php page (on the web), I use PHP to pull in $_GET variables from the URL parameters which then populates the page with my static content, and their customized information that they entered into the form.
I do have a UIWebview inside one of my UIViewControllers. The destination URL to be displayed within the WebView is a page on my server (therefore I have access to make changes on it).
That page basically has a list of PDFs to be downloaded (imagine an un-ordered list of hyperlinks each pointing to a PDF file).
I need a way to tell my App that whenever a file is downloaded from that WebView by clicking on one of the links, I need it to be saved inside my application folder instead of the iPhone/iPad memory.
Is there any way I can achieve that? Are there alternatives?
You can allow UIWebView to call your Objective-C delegate function. This link provides an overview of how to do it: http://dblog.com.au/iphone-development/iphone-sdk-tip-firing-custom-events-when-a-link-is-clicked-in-a-uiwebview/ Basically, the delegate function will be called on all requests from the UIWebView. You can examine if they are for links to a pdf files, and if so, write your own objective-c code to download the file and store it in your Application directory. You'll probably want to add some UI to let the user know what is happening. Otherwise you let the request go on as normal and it will be displayed in the web browser.
For a project we need to download and save pdf files on an IPAD device for offline use through an AIR for iOs application.
After a lot of searching I haven't found much information on this subject. My question is, can it be done, and if so, can you provide us with some pointers to lead us in the right direction.
Thanks for your time!
Sure, first you check if you can access the web - can use a class like air.net.URLMonitor, if you can you can set up a URLStream instance.
You get data while its downloading the file using the progress event, write that out to a File instance using the FileStream class.
To display the PDF file you can use a StageWebView or HTMLLoader.