How to restore stack trace in Swift?

Question

How to restore stack trace in Swift so that I can find out which method was the last one called before the crash?

What I want to replicate in Swift is this method in C #:

public static Assembly GetComponentInInvocationDegree(int invocationDegree) { if (invocationDegree < 0) throw new ArgumentOutOfRangeException("Cannot set out of range value: invocation degree must be greater than or equal to zero"); var stackInvocacion = new StackTrace().GetFrames(); if (invocationDegree > 0) { int invokingAssemblyIndex = 0; string currentDegreeComponentName; try { for (int currentDegree = 0; currentDegree < invocationDegree; currentDegree++) { currentDegreeComponentName = stackInvocacion[invokingAssemblyIndex].GetMethod().ReflectedType.Assembly.GetName().Name; while (stackInvocacion[invokingAssemblyIndex].GetMethod().ReflectedType.Assembly.GetName().Name == currentDegreeComponentName) invokingAssemblyIndex++; } } catch (Exception ex) { throw new InvalidOperationException(string.Format("Cannot get component in invocation degree: invocation degree {0} does not exist", invocationDegree), ex); } return stackInvocacion[invokingAssemblyIndex].GetMethod().ReflectedType.Assembly; } return stackInvocacion[0].GetMethod().ReflectedType.Assembly; } 

Answer 1

In many cases, you can use the try/catch mechanism.

 do { try ... // risky business goes here } catch let error as NSError { print("Error: \(error.domain)") println(NSThread.callStackSymbols()) }