I just downloaded XCode 3.2.3 with iphone sdk 4, but I need to compile my app with 3.1.3, but there is no option in the project settings for that (just 4.0 or 3.2). Is there any other possibility for me besides downgrading to XCode 3.2.2??
In the Deployment section of the Build settings, there is an option to set iPhone OS Deployment Target. You can choose 3.1.3 from the list of available OS versions.
Yes, you may choose any iPhone OS
Deployment target from the list. But
make sure that you are not using any
iPhone SDK 4.0 specific
methods/properties.
That is the catch, isn't it... is there an easy way to check that we're not doing any iOS4 SDK calls if we cant trap it during a compile?
I found this (see the bottom of the page):
http://0xced.blogspot.com/2010/07/using-sdk-313-with-iphone-sdk-4.html
Unfortunately, it requires the following on the first step:
"Locate iPhoneOS3.1.3.sdk and iPhoneSimulator3.1.3.sdk from an iPhone SDK 3 installation"
And, of course I blew away my iPhone SDK 3 installation when I installed the iOS 4 SDK. So I'm kinda stuck.
Is there another alternative?
Thanks!
Yes, you may choose any iPhone OS Deployment target from the list. But make sure that you are not using any iPhone SDK 4.0 specific methods/properties.
I strongly recommend you read this. SDKs other than 3.2 and 4.0 are no longer available for App Store submission.
Related
I am creating an iPhone project for iOS 5. I need to know if i can run the program in iPhone 4.3.3 and higher ?
Are you using anything in your code that was introduced with iOS 5.0 & newer? (such as storyboards)
If your answer is yes, then you can't run it on 4.3.3.
If no, then you can set the minimum required version to 4.3.X (and here's a tutorial you can use).
Here is a related question (and another one) that may help you out a bit more.
IIRC, you can configure the simulator in xCode to emulate an earlier version of iOS so you can confirm whether or not it will work on 4.3.3. Have a look at the build settings for your project, you can change the target O/S. I'm not sure all versions are available by default though. You might need to download other versions to test.
You said you are using ARC. ARC will work with iOS 4.x, but not iOS 3.x. So ARC will not be a problem. Based on everything else you said about not using storyboards and everything being coded, you should be okay. If you click on a method in Xcode it should allow you to bring up the documentation, and in the documentation it will provide the iOS version that it was released for. Make sure that this it iOS 4.3.3 or lower.
I can change my deployment target from 3.0 to 4.3 and test that my application is compatible with all these versions but how can I test if my application is compatible with all versions including iOS 5.0? Any idea regarding the same? Also note that I have iPhone 3GS with iOS 4.0.2 and need to test in iOS 5.0. Hope to get a good help. Thanks.
Eventually, you'll need to get a device that has iOS 5 installed. Without that, you can only test this in the iOS 5 simulator.
Also note that changing the deployment target is not enough to test if your app is compatible with that OS version. Basically, this just means that you promise that it'll run from this version upwards, but it doesn't enforce that you don't use any APIs that might not be available there.
I you wanna do it properly, you will have to get every device there is, with every version you want to support ... that is, imho, overkill. I just test my Apps on the 4.3 and 5.0 Simulator in XCode and on my 5.0 iPhone 4. And have not had any problems with that 'til now.
BTW you should update your 3GS to 5.0.1.
To test in the simulator with iOS5, you can set the OS version with the Version submenu of the simulator's Hardware menu.
I am writing an iPhone app in which I want to support the largest user base possible at this point in time (with minimal pain), so I decided that targeting IOS 4.3+ would be a good subset of users for my audience.
I started working in XCode 4.2, but reverted back to XCode 4.1 when I realized that the project templates had changed and everything seemed very intertwined with storyboarding, ARC, etc.
I have built out my application to the point I actually want to test on my device, which has iOS5 installed. When I attempt to use it though, I get this message as soon as I click 'use for development' in Organizer/XCode:
The project's build settings look like this:
My Question Is This: How do I get this application, built in XCode 4.1, to run on both iOS 4.3 and iOS 5 phones?
Are iOS SDKs not backward compatible? I come from Android development in which a less than current SDK will generally work on a newer SDK - is this different in the iOS world? And if so, how is this handled typically?
Any direction on how I should proceed would be greatly appreciated.
You can go ahead and open your app in Xcode 4.2 and it should still work. I've been working on a particular app since Xcode 3.x days and I'm nearly done, chugging along in Xcode 4.2 right now. It shouldn't be a problem. If you want to work with Xcode 4.1 you will be fine, but you won't be ale to use new features introduced in iOS 5.
There are several aspects of "cross-version" development to note.
Testing: You can only test on version of iOS that are included with your SDK, or that are installed on physical devices that you may have. The SDK generally comes only with the latest iOS, sometimes the previous one is included as well, but since Xcode 4 was released, the older SDKs have been progressively deprecated with each release. This is not to say that your app which is linked against the iOS 5 SDK won't run on older versions of iOS. It just depends on how you implement new features.
Features: In order to support older versions of iOS properly, you want to make sure that you don't implement new features without properly checking for the existence of classes, methods, and properties that were introduced in the newer versions of the OS. Unlike Android, you don't have to worry about a million hardware configurations. ;-)
Weak Linking: To support a new feature and still be compatible with older versions of iOS, you need to weak link against frameworks that you are using to implement new features. You can read more about that in the Apple Documentation on Weak Linking.
Deployment Target: The setting that prevents the app from loading on older devices is called the "Deployment Target". If you set this to 3.1.3, then your app will run on iOS 3.1.3 and higher. Remember that if you don't code the the proper version checking, your app may break.
ARC: You can choose to enable or disable Automatic Reference Counting when you create the project. ARC scans your program at compile time only, not at runtime, it doesn't break the app on older versions of the OS.
You need the latest version of XCode and the iOS SDK to install your apps onto your iOS 5.0 phone. That doesn't mean the inverse is true -- you don't need the same version of iOS on your device that you have installed on your computer.
Hope this helps!
You can use the latest SDK and simply set the "IOS Deployment Target" version to 4.3 in the project build settings.
XCode 4.1 doesn't support iOS5 in the sense that Xcode package doesn't contain the iOS5 SDK. So you must return to Xcode 4.2 and target your project for iOS 4.3 (you can also target it for iOS 4.0 with this Xcode version, but you will not be able to simulate it; you can even download older iOS 4.x package versions from the Xcode preferences menu if you really need to simulate them in your device).
You can opt-out of ARC if you want, this choice is given to you when you create the project, so don't worry; but consider that ARC does its magic at compile time only, not at runtime, so your backward compatibility will be kept if you decide to use this technology. Finally if you don't want Storyboard just pick the Empty app template and it will simply put in your project only the basic files. From this template you can create any iOS app, this is the approach I normally follow.
I'm diving into iOS development and I'm building a simple app that will support iOS version 3.2 to 4.2. I've tested it fairly well in the latest version of Xcode on the 4.2 simulator, but I would like to also simulate it running on a iOS 3.2 device. After reading a few tutorials on this, I managed to download and install an older version of xcode along with the older 3.2 SDK, but when I build my project in the older version of Xcode, I get a ton errors due surrounding all the iOS 4.2 functionality that the older version of Xcode doesn't support. I'm weak-linking all the 4.2 frameworks, but I'm still getting errors. How can I get my 4.2 app to build successfully in this older version of Xcode and get it to run in the 3.2 iPhone simulator?
Thanks so much for your wisdom!
You need to add #ifdef __IPHONE_4_2...#endif around any lines that reference features that only exist on 4.2. That way the 3.2 compiler will build your app as if those lines don't exist.
You need to be extremely careful to structure these statements in such a way that they exactly mirror the bits of code that would be disabled when running the built-for-4.2 build on 3.2, otherwise there's not a lot of point.
This will build your app without any of the 4.2 functionality included, so it isn't actually testing whether your weak-linking etc is correct, it's just testing how the fallback 3.2 code works.
It will probably throw up a few warnings about features/methods you didn't know didn't exist in 3.2. Make sure these have appropriate fallback code added.
(btw Apple has been known to reject iPhone apps with a Base SDK of 3.2. You need to support at least 3.1.3 if you go back before 4.0)
Did you select the option of setting the base SDK to 3.0 or others?Because by doing so you can run the new APIs available in iOS 4.2 on older OS also.
Cheers
On the second issue, of actually running it in a 3.2 version of the iPhone within the iOS simulator: I've struggled with this -- Xcode 4.0.2, set my deployment target to iOS 3.2, set my project to iPhone only, but when I try to run in the iOS Simulator under version 3.2, the simulator morphs into the iPad simulator, even if it had been running as an iPhone simulator until I selected the version number.
This frustrated me for a while. But I read this and it made sense:
http://en.wikipedia.org/wiki/IOS_version_history
The iPhone never ran 3.2; that was an iPad-only release. So, even though the Hardware > Version menu in the iOS Simulator lists 3.2 (7W367A), presumably that setting is only intended to be compatible with Hardware > Device > iPad. The simulator is enforcing this rule when it switches me into an iPad simulator. It makes complete sense.
So I'd need a 3.1.3 simulator, or older, to run my app as if running on a 3.x-generation iPhone. This isn't available in my Xcode 4 build, so it makes sense to me now that I'm just unable to do anything about this, short of putting older Xcode builds on my machine.
I think the right way to do is as follows:
1.If you are developing for version 4.2, then you must be having Xcode version 4.2 installed.
2.While building your application on devices 4.0 and 3.2 OS, select base SDK to 4.2, and deployment target device to the minimum version you want to support, say 3.2. This will make your code compatible to lower version and your application will be loaded on lower versions.
Also to support new APIs in lower versions you may follow the link :
http://www.marco.org/1648550153
I hope this helps you
You can run both 3.2 and 4.x simulators in the latest Xcode (not at the same time, of course!). You have to set "Base SDK" to 4.2 and "iOS Deployment Target" to 3.2. Now you can select the 3.2 Simulator (or later) from the "Overview" popup menu in the top left corner of the project window. Also you can select the simulator version in the iOS Simulator app itself, via the "Hardware->Version" menu item.
I wrote iPhone application. Very simple! It use Cocos2D only, and all other features is very basic, no accelerometer, no camera, nothing. Just buttons and sounds.
I think every iPhone can run this app (there is no limits on Cocos2D right?), but my XCode only let me use 3.0 and upwards. I want to confirm 1 thing and ask one thing:
If I put "iPhone OS 2.0" in my iPhone OS Deployment Target in XCode, but my "Active SDK" in XCode still says 3.0, if I compile using this and submit to App Store, when it goes up, people who use 2.0 can still download and use the game yes?
Is there way I can test in a 2.0 simulator to make sure it works? My XCode only have 3.0 and higher simulation.
Set your Deployment Target for iPhone OS 2.0 and Base SDK for whatever version of the SDK you have (3.0, 3.1.2, 3.1.3, 3.2, etc.). Active SDK is just a compile-time override of the Base SDK. You should set your Base SDK to the latest STABLE version of the SDK and the Deployment to the oldest device you intend to support.
If you open up the iPhone Simulator and select from the menu bar Hardware > Version, you should see an option for SDK version 2.x. If you don't see this, you don't have any 2.0 SDK versions installed. 2.2.1 was included up to version 3.1.3, but you might not see it in the Simulator. You'll have to find an older version of the SDK to install. They can be found online by Googling. Don't have a link off-hand, but shouldn't be hard.
Edit
This is out-of-date for the newest version of Xcode (currently 3.2.5).