I'm developing an iOS App which targets iOS 5.1+. I'm using XCode 4.5 on Mac OS X 10.8 and I do own an iPhone 4 with iOS 5.1.1. The app needs OpenCV, which I have successfully built from sources according to a tutorial in the OpenCV-Documentation.
Here is what happens:
When I start up the application I get an exception:
dyld: Symbol not found: _objc_setProperty_nonatomic
The error does not occur with iOS 6, but with iOS 5.1 in both the simulator and on a real device.
What is that? Is it related to OpenCV? Does it have to do something with incompatibilities between iOS / the iPhone / XCode??
EDIT: My development target is set to 5.1. The Base SDK is 6.0. I copied an SDK für 4.3 (which is the lowest version that XCode 4.5 will support) from another Mac and set development target as well as the base SDK to 4.3. Did not work either (it did not even build then).
I did not an update, the project has been started from scratch using XCode 4.5 initially.
Meanwhile I also found a tip to use gnulibc++ instead of libc++, but that also resulted in that the project did not build at all.
I built a test project and found the same issue. OpenCV is being built with a deployment target of ios6, this is a known issue, and a fix is pending review, see https://github.com/Itseez/opencv/pull/70
Related
Despite the release notes stating this is supported and previous version of Xcode 6 working ok, I have a rather verbose error message when trying to build with 7.1 SDK.
"iOS targets using Swift cannot be built against an SDK older than 8.0, but the effective SDK is 7.1."
Has anyone else seen this?
I just had this issue, but with the app store build of Xcode 6.0.1 (6A317).
The issue was that I had copied old SDK's (7.0, 7.1) into the Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs directory. This was causing Xcode to use the wrong SDK for building.
Deleting them solved this problem for me. That'll teach me for mucking around with Xcode.
i changed the base sdk for iOS 6.1 in xcode 5 .
When i simulate my project on a iOS 6.1 simulator or on a iOS 6.1 device
all works fine. But when i build a ipa and install it on a iOS 7 device
the device use the iOS 7 sdk and my hole app looks weird. I changed my base
sdk for iOS 6.1, so why use my device the iOS 7 sdk?
I read that iOS 7 use the iOS 6.1 sdk for old published apps.
What do i have to do that iOS 7 also do that for my app?
My only idea is to install xcode 4 again...
I have experienced the same problem - unfortunately only discovered AFTER submitting to the app store and the app being approved and released, causing all sorts of mayhem due to interface glitches.
The issue occurs due to a bug in XCode 5 (including in XCode 5.0.2 it seems) that is triggered when you install older SDKs.
When you have multiple SDKs installed, you will see that when you connect your device to XCode, there are multiple entries for your device, with no way to tell them apart. But it appears that the TOP entry is for the OLDEST SDK you have installed, the BOTTOM one for the NEWEST SDK.
I have found that if I first use "Test" project option to run the app on the device with the SDK I want to use (in my case the top entry, which is for iOS6.1 SDK), then that is the SDK that will subsequently be used when I archive the app.
You can have both xcode 5 and 4.6.3 installed.
Also a lot of post say that in the simulator it look iOS7 but on device it will look iOS6.1 if you set the base sdk to 6.1
see:
Is it possible to install iOS 6 SDK on Xcode 5?
Do apple allow custom iOS 5/6 style UI for iOS7?
I have been able to make xCode 4.3.2 work with iOS 6.0 using the technique described here Is it possible to get the iOS 5.1 SDK for Xcode 4.2 on Snow Leopard?
When I add AdSupport.framework or other iOS 6 specific frameworks, it builds fine against the iOS device scheme with no device connected. However, as soon as I connect an iOS device it gives erros 'framework not found AdSupport'. It does not even compile against iOS Simulator 5.1
I am using iOS 6.0 as base sdk and tried deployment target of 4.3 upto 5.1 but still same error.
AdSupport.framework is only available beginning on iOS6.
You should mark the framework as Optional (Weak Reference) and ensure that when running on iOS versions below 6, that the AdSupport code is not called.
I just upgraded to Xcode 4.3.2 (the newest version). When I try to run an app that I built in previous versions of Xcode, this error pops up:
Xcode cannot run using the selected device.
No provisioned iOS devices are available with a compatible iOS version.
Connect an iOS device with a recent enough version of iOS to run your application
or choose an iOS simulator as the destination.
I made sure to change the iOS deployment target to 5.1. How can I get rid of this error?
All I did was press build and run. I want to run on the iOS Simulator.
You can set Xcode to build to the simulator as illustrated below.
Ok, there have been some questions alluding to this before, and I've even read some second-hand reports of people successfully doing this, but so far I haven't found a concrete answer.
Basically, I want to build an application for simulator using iOS 4.x, and then run it on a 3.x simulator.
I have both SDKs installed, so all I need is the last mile of getting the app to show up in the 3.x simulator.
I tried just copying the app across from Library/Application Support/iPhone Simulator/4.2/Applications to Library/Application Support/iPhone Simulator/3.0/Applications but it doesn't show up when I load the 3.x simulator. There's a binary plist called applicationstate.plist, which I'm guessing keeps track of what apps are installed on the simulator, but I don't know what the binary format is so I'm kind of stuck at this point.
Has anyone managed to load a 4.x app onto a 3.x simulator? And if so, how did you do it?
Why are you even trying to do this? What are you trying to achieve? If what you really just want to do is ensure the app works on iOS 3.x then simply state that in xcode and don't worry about the actual simulator. The simulator could be running iOS 5.0 for all you should care as long as you have set 'iOS Deployment Target' to '3.0' in xcode's project settings. That will ensure the application is compatible with iOS 3.x and above. Obviously you then still need to ensure you're not calling methods from SDK 4.x when it will run on an iOS 3.x device. If that is what you're trying to test then what you're doing won't actually work. You should (as Apple advises) always grab hold of a real device running the target firmware version and test it on that. Grab an old iPod for example with iOS 3.x and try testing your app on that to ensure you haven't called iOS 4.x methods when running under an older firmware.
The answer is: No, you cannot build for 4.x simulator and run on a 3.1.x simulator or earlier due to fundamental changes in the way the simulator works.
The only way to test 3.x support is to either run it on a 3.x device (after setting min deployment target), or build on an older xcode that supports 3.x simulator (which isn't feasible if you use Xcode 4, except for iPad 3.2).
Note: Setting the deployment target does not test compatibility with older operating systems. It's the operating system that it actually RUNS on that matters (such as "iPhone 4.3 Simulator", "iPhone 4.0 Simulator", "iPad 3.2 Simulator", or an actual device).
Of course, now that 3.x users make up less than 10% of the total population, it's not really worth the trouble to support it anymore.