异常类型的应用程序崩溃:EXC_CRASH (SIGKILL - codesign)

I have created a very simple app which runs fine in the iOS-Simulator. If I run the app with XCode on my iPad it also runs fine for a while. Without having the iPad connected to XCode my app is starting but if I get to a screen where is needs to load data into a UIWebview it crashes. If the iPad is connected to XCode or I run the app in the iOS-Simulator this won't happen. I have reviewed the log in the Crashreporter but I have no clue at the moment why the app crashed. To load the content into the webview I am using the latest AFNetworking version via Cocoapods. The app only crashed if you call a ViewController with a UIWebview. The Webview is trying to load the content but is grey in the background. After 10 seconds the app crashes.I have created a very simple app which runs fin