How to use NSSetUncaughtExceptionHandler to show exception message on UIView in Swift

Question

I use Martin R\'s answer to print the NSSetUncaughtExceptionHandler in Swift.

How should I use NSSetUncaughtExceptionHandler in Swift

  func exceptionHan         


        

Answer 1

NSSetUncaughtExceptionHandler takes a C function pointer, and C function bodies are fixed at compile-time. C function pointers get bridged into Swift 2 as @convention(c) function types, and, like in C, you can only pass a function whose body can be fixed at compile-time; i.e. top-level Swift functions, or anonymous function which don't capture any variables.

Your anonymous function captures self from the enclosing scope, so it cannot be used as a C function. You should try to access the controller or do whatever you need to do in some other way using only global variables or classes.