Feeds

Go native with iPhone development

Baby steps

The Power of One Infographic

There are various ways of getting the application bundle across to your iPhone. I use a freeware Secure FTP (SFTP) client called Cyberduck but you could do the same job with - for example - a command-line SSL connection from a PC or Mac. Place your application bundle into the /Applications directory on the iPhone.

There's one other important step: before launching the application, set the execute bit on the executable itself, not on the bundle folder. From the command line - there's even a tiny terminal emulator for the iPhone - you'd just type "chmod +x Hello". Cyberduck has a GUI interface for doing this.

If you now go to Springboard - the iPhone's icon-based Finder application - you'll hopefully see the icon for your new application. Click it and with any luck, you'll see the Hello World application in all its glory.

There are a couple more things you should know. Firstly, to get Springboard to display a nice custom icon for your application, place a 60x60 pixel image, icon.png, in your application bundle. Restart Springboard, and it should appear.

Finally, you'll notice that when your program starts, you momentarily see an unpleasant, blurred image similar to the OS X default application icon. This is Springboard's way of saying: "You need a Default.png file!"

Whenever Springboard launches an application, it looks for this inside the application's bundle. If found, the image is slapped onto the iPhone screen before the new application starts to run. It feels as if the application starts much faster than it actually did, because the expected program background appears almost immediately. Sneaky, huh?

To exploit this feature, create an image (320x460 pixels) appropriate for your application, name it Default.png and place it in your bundle. If you simply want to disable the blurred default image, even a one pixel high, one pixel wide image will suffice.

Wrapping It up

That is iPhone development at its simplest. What I haven't covered, of course, is the nitty gritty of building a native iPhone application. Coming ahead of full tooling and a properly supported, Apple-backed development environment, though, this should give you the basics and get you thinking.®

The Power of One Infographic

More from The Register

next story
Auntie remains MYSTIFIED by that weekend BBC iPlayer and website outage
Still doing 'forensics' on the caching layer – Beeb digi wonk
Major problems beset UK ISP filth filters: But it's OK, nobody uses them
It's almost as though pr0n was actually rather popular
Microsoft unsheathes cheap Android-killer: Behold, the Lumia 530
Say it with us: I'm King of the Landfill-ill-ill-ill
All those new '5G standards'? Here's the science they rely on
Radio professor tells us how wireless will get faster in the real world
Apple orders huge MOUNTAIN of 80 MILLION 'Air' iPhone 6s
Bigger, harder trouser bulges foretold for fanbois
Yorkshire cops fail to grasp principle behind BT Fon Wi-Fi network
'Prevent people that are passing by to hook up to your network', pleads plod
US freemium mobile network eyes up Europe
FreedomPop touts 'free' calls, texts and data
Oh girl, you jus' didn't: Level 3 slaps Verizon in Netflix throttle blowup
Just hook us up to more 10Gbps ports, backbone biz yells in tit-for-tat spat
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.