I am working a rss reader app for iphone . What are my options for displaying entry summary in rss feed ( which could be html) in a tableviewcell without compromising scroll performance .
I dont control the feed so html in summary section is out of my control .
I am thinking of uiwebview would be my last option ( so rss feeds have images and stuff in there, unfortunately ) . I was thinking if there was a way to extract summary text from html.
You can use a WebKit view, UIWebView to present the feed and add it a subview to the UITableViewCell.
You need to worry about the cell height and making the UIWebView non-scrollable.
I recently saw a presentation on Three20 (http://groups.google.com/group/three20/) that included a few things that might help you.
This is the specific thing I'm referring to: http://mattvague.com/three20-custom-cells-iphone-tutorial
If anyone is interested I just made a new up-to-date version of my custom cells tutorial, check it out at http://mattvague.com/three20-tttableitem-tutorial
Cheers!
Related
I am working on epub reader, i want to split views as image below,when user read above view also able to read below view.
please help
http://i.stack.imgur.com/eKn0Y.png
http://i.stack.imgur.com/Ny4oW.png
Try this resources:
http://www.mindtreatstudios.com/our-projects/custom-uisplitviewcontroller-ios/
http://www.alterplay.com/ios-dev-tips/2011/05/custom-uisplitviewcontroller-for-ipad.html
as you know the Mail app in iOS 5 have a rich text editor is there any possible way to use this feature for a regular UITextView ?
I know of two fundamental approaches to creating a rich text editor in iOS 5:
Use Core Text and a custom view. I don't have any experience with this approach.
Use a UIWebView (instead of a UITextView) and the contentEditable HTML attribute. The basic idea is to load a custom HTML document from your app resources directory. The bare minimum that it needs is this:
<div contentEditable>TEXT_PLACEHOLDER</div>
To initialize the rich text editor view:
1. Load the contents of this file into an NSMutableString and replace the TEXT_PLACEHOLDER string with the text you want to edit.
2. Send the loadHTMLString:baseURL: message to the UIWebView with that HTML string.
Now you have a UIWebView displaying your text inside a div with contentEditable. At this point, you should be able to run your app tap on the text, and be presented with a cursor and be able to add/remove text. The next step is to add rich text formatting functionality. This is done with a set of simple javascript function calls. See the Mozilla documentation on contentEditable for a great reference. You will also want to add a Javascript function to your HTML template file like this:
function getHtmlContent() { return document.getElementById('myDiv').innerHTML; }
So you can easily retrieve the edited text as HTML using [myWebView stringByEvaluatingJavaScriptFromString:#"getHtmlContent()"]. You can also add custom context menu items like you show in the screen shot in your question.
If you have access to the Apple iOS dev center, the WWDC session Rich Text Editing in Safari on iOS talks all about this approach.
A variation of this approach is to use a third-party rich text editor like TinyMCE. I've heard of some success with integrating this into a UIWebView in iOS 5. Again this relies on the contentEditable attribute.
Here is my implementation. Still haven't added UIMenuController functionality, but it's planned to be added soon.
https://github.com/aryaxt/iOS-Rich-Text-Editor
The iOS 5 rich text edit control is also present in the notes app in iOS 4 (make a rich text note on the computer and sync it to see).
This is a custom Apple-made control which they use in their own apps, but it is not published in any official developer API. It's probably in the SDK somewhere, but because it is undocumented, even if you find it and use it, Apple will reject your app.
Basically, if you want a rich text control you will have to make your own.
Edit: Try using this: https://github.com/omnigroup/OmniGroup/tree/master/Frameworks/OmniUI/iPad/Examples/TextEditor/. I haven't used it, so I don't know how well it will work. (Link from this question)
look at https://github.com/gfthr/FastTextView which is more good open source editor than Omni editor
Just wanted to ask u how do we link HTML file in PhoneGap Applications.As u know that in when we create PhoneGap application one Html file comes with it i just want to know how it is linked to the application so that i could add more Html files to it and use it ib webview
Thanks all in advance
To use multiple pages you can just link to them as normal. (Remember, use relative links).
It's hower normal to use only 1 page in phonegap application. 1 page that uses hidden divs. Don't really know why, besides the fact symbian only supports 1 page with acces to the device.
Just place your HTML files and other resouces (like images, scripts, etc) inside the "www" folder :) as Erik said, just link them as yoiu normally do. You don't need to edit any Objective-C files (like .m or .h).
Good Luck
PhoneGapDelegate.m is where the phonegap settings are stored. The PhoneGapViewController.m is where the UIWebView is bound to the xib.
Please control click on any web view delegate method placed in App delegate method then in the new class which appears after contrl clicking make following changes...
(NSString*) wwwFolderName { return #"www"; }
(NSString*) startPage { return #"index.html"; }
In these 2 functions i.e wht html file u want to attach in your phone gap u can write the name in start page function as shown above.
I am looking for a way to programmatically (in obj-c) generate a PDF file from a local html file. I am dynamically generating the html from user inputs, I need to create the PDF and send it to the user (via email). I am having difficulty with the PDF generation portion.
I have the code to create a PDF using CGPDFContextCreateWithURL but I am struggling with drawing the page using quartz.
I have searched extensively on SO as well as the internet to no avail.
Any help is much appreciated!
To generate a pdf from an HTML, you need to render the html into a web view, and take snapshots of the web view, and render them into an image context.
The tutorial might be helpful:
http://www.ioslearner.com/convert-html-uiwebview-pdf-iphone-ipad/
I've written a little piece of code that takes an NSAttributedString from DTCoreText, and renders it into a paged PDF file. You can find it on my GitHub Repository. It won't render images or complex html, but it should serve for most uses. Plus, if you're familiar with CoreText, you can extend my PDF frame setter to generate these items.
So what it does now: Give it an HTML string, and it will use DTCoreText to generate an NSAttributedString, then render that into a PDF. It hands back the location that it saved the PDF file in the app's Documents folder.
Why not use a WebService, send the HTML page to this and retrieve the PDF-file ?
That way you can use iTextSharp and C#, and you're done in about 2 minutes.
Plus (if you're evil) you can store and see all the data on your server.
I haven't tried this myself so i have nothing to offer concrete but I'd have to imagine there has to be an easy way to do this on iPhone due to the imaging model. I'd look deeper into the documentation.
As to pushing back with the client that is up to you but there are probably multiple reasons for wanting to keep everything local. Frankly I would not be pleased at all to here from somebody I hired that he couldn't manage this particular task. So think long and hard about this push back. Oh even if you do push back a webserver is a poor choice. I'd go back a step further and investgate why you need something in HTML in the first place.
I've never tried this so I have no idea if it'll work, but how about loading the HTML into a UIWebView, and then make the view draw itself into a PDF context? E.g.
UIWebView *webview = [[UIWebView alloc] initWithFrame:CGRectMake(...)];
[webview loadHTMLString:html baseURL:...];
Then:
- (void)webViewDidFinishLoad:(UIWebView *)webview {
CGPDFContextRef pdfContext = CGPDFContextCreateWithURL(...);
[webview.layer drawInContext:pdfContext];
...
}
I made it by following this SO: https://stackoverflow.com/a/13342906/448717
In order to maintain the same content's proportions I had to multiply the size of the WKWebView 1.25 times the printableRect's size set for the UIPrinterRenderer, as the screen points differs from the PostScript's... I guess.
I am trying to trouble shoot a css issue that is appearing only in iphone browsers. I simply need to detect if the user is using an iphone, and if so, render a modified version of the div that is being affected.
I am happy to just call this modified version of the css div in the header as it will save having a second style sheet.
You used to be able to do it between browsers. It was especially good when rendering a IE6 fix.
Thanks for your help in advanced.
James
if((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))) {
// do something
}