If you have been using the Mac OS for any amount of time then you are likely aware of Apple’s password management system known as the Keychain. iOS devices also have a keychain system for storing user data securely.
If you need to store username/password data for a web service securely within your apps then you will likely want to use the iOS keychain service. I’ve found an excellent guide explaining the basics of reading and writing to the keychain. Also included is a sample project demonstrating keychain usage (you will need to run on an actual device to test real saving/loading to the keychain).
The tutorial on using the keychain to store username and password is no longer up to date and has been removed – please check out this tutorial that explains how to use the iOS keychain and this excellent iOS keychain wrapper.
A nice easy to follow guide in case you ever need to use the Keychain service within your apps.
While the iPhone 4, and iOS 4 upgrade may be grabbing most of the headlines due to it’s recent release the iPad has in it’s short existence proven to be a fantastic seller with over 3,000,000 iPads sold in under two months.
Already there has been much written from those looking to grab headlines due to the iPad’s success. However there really have not been too many high quality tutorials for those looking to develop on the iPhone.
I shared some excellent tutorials from Ray Wenderlich previously here:
iPad Tutorial – Converting iPhone Apps
Alex Curylo at Under The Bridge has created a great list on his website for iPhone developers you can find here:
iPad Programming Roundup
Three excellent resources on that list which stuck out to me were:
- iPad Multitouch – An example of how to use 11 simultaneous touch events from Matt Gemmell.
- iPhone To Hybrid – Making your iPhone apps truly multi-platform from Dr. Touch
- Designing For iPad – Great guide on designing fro the iPad from information Architects.
The iPad is still on everybody’s mind, and I’ve been wasting time reading many of the commentaries and brainstorming app ideas. Here’s a roundup of some of the more insightful, and humorous posts I’ve seen from iPhone developers on the iPad along with some other articles providing technical knowledge that wasn’t really covered in the press conference or on Apple’s website.
iPad – First Impressions – Very insightful post about new development opportunities arriving with the iPad
iPad: What Developer’s Need To Know – A good summary of iPad features relevant to developers
Gizmodo Knows About Sucking Apparently – A passionate response to Gizmodo’s iPad Bashing
Apple’s A4 SOC Unveiled – some details on the CPU/GPU powering the iPad
My own thoughts is that while I would have liked to have seen some extra hardware such as a camera built into the device for video chat. Apple seems to have fulfilled their vision though of creating a device that fits directly between the Mac and iPhone and won’t cannibalize the sales of either. I see the iPod Touch needing a price drop as I don’t think anyone in their right mind will buy one of the higher end iPod Touch models now.
There’s also seems to be a big outcry about the iPad lacking specific software. In my opinion that’s a good thing, as rather than creating this software themselves it gives us developers greater opportunity. The iPad is destined to become essential in schools (I saw a newscast yesterday showing that many students now take notes in College lectures using the iPhone – as ridiculous as that is). There’s also markets for which tablets have been essential for some time such as the medical market.
So many new opportunities are being presented to us with this device, it will sell to not only the core market, but to people who would never buy a smartphone or iPod touch. My head’s already popping with more iPad specific ideas as I right this, and the more I think about it the more excited I get about this device.€