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iOS Simultaneous Xcode iPhone SDK 2.2.1 and 3.0?

johnnyjibbs

johnnyjibbs

macrumors 68030
Original poster
Sep 18, 2003
2,964
122
London, UK
Hi all,

Now that OS 3.0 beta is out, is it safe to upgrade the SDK to 3.0 or will that mess up my 2.2.1 code?

I'm thinking of buying the cheapest iPod touch 2nd gen I can find with the view to upgrading the firmware on that so that my iPhone stays on 2.2.1. This way, I'll have a head start on the new features without messing up my iPhone or current apps.

Will upgrading Xcode and the SDK mess up my current developement or can you just switch between the SDK versions and run side-by-side? Buying another Mac is not an option.

Many thanks for your help.

John
 
Good question, suppose we will have to wait and see what peoples experiences are.

Normally minor revisions of the SDK can run side by side and you can choose which SDK to target your app at. I can't see why this wouldn't be the case this time round either, especially if Apple decide to make the new OS a paid upgrade as that really will a PITA for developers who have apps almost ready to be deployed now
 
Yesterday I successfully edited and built a 2.2.1 app using the new 3.0 SDK.

So that's one data point. Your mileage, of course, may vary. :)
 
eddietr said:
Yesterday I successfully edited and built a 2.2.1 app using the new 3.0 SDK.

So that's one data point. Your mileage, of course, may vary. :)
Click to expand...

Yes, but will apple approve an app developed for 2.2.1 with the 3.0 sdk?

Thats the key thing here.
 
Funny then that their 'Read me before downloading' section on the iPhone Dev Center site states: "iPhone SDK for iPhone OS 3.0 beta is for development use only. This new version should only be deployed on devices dedicated for iPhone OS 3.0 beta software development and cannot be used for submitting iPhone OS 2.2.1 applications."
 
How true. So we have to have 2 macs if we want to release apps for 2.2.1 and be one step ahead and start coding for 3?? Sounds a bit daft!
 
You can install both 3.0 and 2.2.x on one hard drive according to Apple dev support. There's a place in the installer to select a custom location. Just don't put the beta in /Developer

And don't submit using a build from the 3.0 beta, unless you want your app rejected. They can probably tell.

e
 
kilobytedump said:
Yes, but will apple approve an app developed for 2.2.1 with the 3.0 sdk?

Thats the key thing here.
Click to expand...

But you would just target the 2.2.1 SDK.

Unfortunately, Apple uses the word SDK to mean too many things. My point is that you can download the 3.0 developer tools (which includes the 3.0 SDK) and then still be able to target the 2.2.1 SDK.

I just submitted a version update today built this way. And tested on several 2.2.x devices here internally. We'll see if Apple rejects it, but I can't imagine why.

Now, if I tried to submit an app that actually targeted 3.0 on the device, then I can obviously see why they would reject that. But you don't need multiple installs to target multiples OS versions.
 
eddietr said:
But you would just target the 2.2.1 SDK.

Unfortunately, Apple uses the word SDK to mean too many things. My point is that you can download the 3.0 developer tools (which includes the 3.0 SDK) and then still be able to target the 2.2.1 SDK.

I just submitted a version update today built this way. And tested on several 2.2.x devices here internally. We'll see if Apple rejects it, but I can't imagine why.

Now, if I tried to submit an app that actually targeted 3.0 on the device, then I can obviously see why they would reject that. But you don't need multiple installs to target multiples OS versions.
Click to expand...

Keep us posted, lets hope you don't have any issues. For the time being, I will have two separate directories.
 
Thanks for your replies. I think I'll go for the two separate installations path to be on the safe side.

Eddietr - let us know how it goes. Hopefully it won't matter either way.
 
Eddietr, that of course makes perfect sense but at times there seems to be no rhyme or reason to these things.

Lets us know what happens with the update.

Ta.
 
eddietr said:
But you would just target the 2.2.1 SDK.

Unfortunately, Apple uses the word SDK to mean too many things. My point is that you can download the 3.0 developer tools (which includes the 3.0 SDK) and then still be able to target the 2.2.1 SDK.

I just submitted a version update today built this way. And tested on several 2.2.x devices here internally. We'll see if Apple rejects it, but I can't imagine why.

Now, if I tried to submit an app that actually targeted 3.0 on the device, then I can obviously see why they would reject that. But you don't need multiple installs to target multiples OS versions.
Click to expand...

Even if you are targeting 2.2.1 in the 3.0 SDK developer tools and building your app that way, you are still building your app with beta software.
 
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