Phonegap iOS-plugin to decode and store base64-encoded file strings - ios

Hello stackoverflow community..
Currently I'm developing a Crossplatform-App (android/iOS) which generates beside its other features pdf-files from user-content.
This works well with the help of jsPDF.
The output of this awesome library is an base64 encoded string of the binary PDF-File.
(see this issue of the creator about the 'binaryness' of pdf files under different circumstances on github).
Now my actual problem:
I need to save this base64 as a proper decoded binary file for further usage on different aspects of the system (mailing it, printing it, a.s.o.).
For Android there is a Plugin that does a similar thing with images. My current plan is to modify and publish it as a more generic plugin for saving base64 encoded to a file.
Problem is now, I cannot find a similar code for iOS, and since I have literally no experience in Objective-C (plenty of Java, ruby, javascript and c though), I'm not able to produce such a plugin in short time.
Do you guys know a plugin of this kind, which can be modified with little Objective-C knowledge.
Perhaps there is someone interested in developing this kind of plugin and we cut could a deal (the project I'm working on is commercial)
Hope to hear some interesting responses, because I'm running out of ideas here :D
Greetings
Jakob

Related

How to generate an XML document in iOS using objective-c

I want to generate an XML document in iOS. My primary goal is to generate it using inbuilt classes/libraries. I researched a lot and I found that NSXMLElement, NSXMLDocument etc are used to generate XML in OS X but not in iOS (correct me if I'm wrong about this). I found some of the third party libraries like GDataXML, APXML etc which generates the XMLDocument as per my needs. But, I'm trying hard to achieve the same using inbuilt classes (if any). BTW, I do not want the strings to be appended manually to create XML.
I'm not expecting a complete code which does the generation. Any help/suggestion on any inbuilt classes would be appreciated.
Thanks in advance.
You're right -- you need to look for a 3rd party solution for XML writing in iOS. For parsing, there is NSXMLParser.

What is the library libz1.2.5 do in iOS?

In reviewing an iOS program , I found a library called libz1.2.3 or libz1.2.5.
What is the purpose of this library? Could any one explain why that library file is needed?
that's zlib - A Massively Spiffy Yet Delicately Unobtrusive Compression Library
it's used for compressing and uncompressing data (files, usually). there's a list of example applications in the wikipedia page.
it's standard for library files to start with "lib", followed by the name ("z" in this case) and then the version number (1.2.5).
[i'm kind of weirded out by the idea that no-one could answer this for 16 hours, so perhaps there's something i am completely missing here. but i don't see what else it could possibly be. it's a pretty famous, popular library.]

Phone directory in iOS

I am creating a IOS phone directory app. I am trying to download a XML file from a url. This XML file will then be used to populate the directory app with phone numbers, names and identifications of all the people in the directory. I'm new to IOS development and I'm looking for any information or assistance on where to get started on how to parse the XML file.
What is included with Cocoa is NSXMLParser, and you can download the source code imageMap. There are also other third party libraries such as TouchXML and TBXML. Although in my experience TouchXML has some memory leaks issues that can create a lot of problems. And the one that has given me the fastest results is TBXML by far.
You can find a detailed article on all the available third-party parsers available here: Best xml parser for your app
TBXML is the way to go IMO. I have a complete code sample if you need it. If you post the structure of that XML file, I can modify the sample to fit your needs.
If you are creating the webserver manually, then I would look into using JSON instead of XML. It's a bit easier to work with. If you need to use XML, the NSXML parser class works pretty well. Here is a good tutorial: http://www.xcode-tutorials.com/parsing-xml-files/
Or you could check out chapter 21 I believe of the big nerd ranch iPhone programming book for a more detailed explination.
Good Luck!

Using Syntax Highlighting

I'm trying to write an IDE for the iOS and I stumbled on a problem. I of course wanted to be able to do syntax highlighting, but I have no idea how I have to get this to work.
I have been googling over a month now, but I haven't found anything useful. Most libraries are C++. That I find no problem, I know enough of C++, but they all use the Boost libraries and I heavily doubt if it's easy to install them on a jailbroken iOS device, or even compile them for the iOS on the Mac.
So I come here for help. What should I do? Should I use a PHP syntax highlighter, which always colors the whole document? Should I write a syntax highlighter my self, that doesn't use the Boost library? Or does somebody here know another library, which can be used on the iOS?
Thank you in advance,
ief2
i have a simillar problem about syntax highlighting, but i prefer to solved it using UIWebview than using core text, because that is a different pixel in rendering text in core text and UITextview (in my problem i was using a core text view that cover by uitextview), and then i try to solved using uiwebview, even i'm still on developing but i can say that it is better using uiwebview than core text, maybe you can take a look at this link http://alexgorbatchev.com/SyntaxHighlighter/ it is an open source code, but it develop using javascript.
Most Boost libraries are header-only. There are only a few Boost libraries, like those for threading and asynchronous I/O, that use a compiled library. If you've found some solutions that would work fine aside from your worries about using Boost, then I would look at them again, as they'll likely work. Even if you must use a Boost library that is not header-only, you can always build it as a static library and link that into your application, so that in the end the only thing that needs to be installed is just your app bundle.
I know this is old, but in case anybody is looking for a complete syntax highlighter for iOS, there's two options:
Highlightr: A Swift library for syntax highlighting, supports hundreds of languages but uses JS as backend. It's fast enough for live editing, though. (Disclaimer: I am the creator of this library).
SyntaxKit: A native solution on early stages of development. Should support any TextMate syntax in the future.

BlackBerry - Unpack Zip File

I'm developing a BlackBerry application in which I need to unpack a zip file compressed with PKZIP. The package could have one file in it, or it could have 10; it will vary in each case. I know that the BlackBerry API has native support for GZip and Zlib, although I'm pretty sure that these methods aren't going to be helpful in my case. It doesn't look as if I can extract the individual files using these calls.
I've tried JZlib (http://www.jcraft.com/jzlib/), which compiled fine, but again it doesn't look as if the methods contained therein are going to allow me to pull the individual files.
It appears as if this is possible, as there's an application called Ziplorer (http://www.s4bb.com/software/ziplorer/) that claims to do perform this exact procedure. How they're doing it, however, escapes me.
So here I am after hours of Googling. I'm welcoming any insight into my problem with open arms.
"zip" algorithms are typically offshoots of the Lempel-Ziv-Welch algorithm. They are a fairly efficient stream compression algorithms, but because of how they function, you can't start to decompress at random points in the file, you have to start from the start.
Any product that claims to be able to decompress one file from a zip still has to decompress everything before it in the zip file in order to know how to decrypt the given file, or even, for that matter, where the file is in the archive.
If you can tolerate GPL code in your application, then this library http://jazzme.sourceforge.net/ that might work. However the project (and its parent project http://sourceforge.net/projects/jazzlib/) don't look like they're being developed.

Resources