Crash on build with release mode at device and simulator

[retsohuang]

Here is screenshot

Two method call have this issue

UITableViewCellScrollViewClass      = NSClassFromString("UITableViewCellScrollView")
EKPlaceholderTextViewClass          = NSClassFromString("EKPlaceholderTextView")

[hackiftekhar]

Could you please share your configuration? mean Xcode version, iOS version etc?

[retsohuang]

Xcode 6.1 and iOS 8,only swift project. The private UITableViewCellScrollView from the table cell seems is gone. https://github.com/CEWendel/SWTableViewCell/issues/170

[Spilly]

I have the same issue. Works on debug, but on release crashes for those two method calls. I am using Xcode 6.1 and support iOS 7 and iOS 8.

[padotj]

Xcode 6.1 and OS 8.1. I'm having the same problem building for release. Works in debug.

[hackiftekhar]

Fixed UITableViewCellScrollView class check and other checks also, but wondering the library is working fine in debug mode and still crashes somewhere in release configuration. :(

[hackiftekhar]

Changing "Optimization Level" in Build Settings solved the problem:- http://stackoverflow.com/questions/3327981/app-runs-as-debug-but-crashes-as-release http://www.mindjuice.net/2011/11/30/how-to-fix-an-app-that-crashes-in-release-but-not-debug

But I'm still worried about it. If somebody has suggestions, I would love to hear.

[hdoria]

+1 for this.

[WadeSellers]

Is this last bug still an issue? I'd like to use but fear the issue discovered upon release is still not resolved.

[hackiftekhar]

Yes, it still an issue and I can't do anything for this. This is beyond my control. All compilation process goes to LLVM compiler.

[WadeSellers]

Ok I see. Yet, this should work just fine when my app would go to the App Store and downloaded, etc. Right? It's just the internal issue but it doesn't effect the outcome once the app is available for consumer download I imagine.

[hdoria]

I'm really worried about this process. Is there anything we could do to fix this?

[hackiftekhar]

A workaround to change optimization level in settings, but for a fix I'm unable to debug code to find the exact problem. If someone can help or suggest me something, I love to hear.

[ronaldsmartin]

I've had issues with NSClassFromString() in optimized builds (while not using IQKeyboardManager) in some of my Swift-only apps. Using objc_getClass() instead was what fixed my problem. Hope that helps.

About to try this pod out- it looks great! Thanks for sharing your efforts!

[hackiftekhar]

How did you replace NSClassFromString() with objc_getClass()? Can you share a sample code?

[ronaldsmartin]

In Swift, both functions have the same type signature, so you can just replace the function name.

Example (checking class availability in Swift):

if NSClassFromString("UIAlertController") == nil { // original
    ...
}

You would use:

if objc_getClass("UIAlertController") == nil { // replacement
    ...
}

In Obj-C, I think it would just be objc_getClass("UIAlertController") instead of NSClassFromString(@"UIAlertController") since objc_getClass takes a const char *name.

[hackiftekhar]

It seems As on Xcode 6.3 (Swift 1.2) this crash is not happening in release mode. @retsohuang , @Spilly , @padotj , @hdoria , @Waderoni , @ronaldsmartin , @mythodeia can some of you test the current Swift version with Xcode 6.3 (Swift 1.2) and let me know if it's still hapenning. If it's not happening then I would love to update Swift Version to match latest ObjC version of library.

[hdoria]

It's not happening anymore. I'm running fine with Xcode 6.3 and Swift 1.2.

[mythodeia]

fine on my end as well

[hackiftekhar]

So closing this issue, because this was not relevant to the library and it relevant to Apple Implementation of LLVM compiler.

[mihirpmehta]

if this bug is already fixed. Can you fix the ReadME file. because read me file says it is still known issie in swift

[hackiftekhar]

Thanks for reminding me. Will surely update. Thanks :)

[hackiftekhar]

Readme updated