Uncaught Exceptionをlogへ保存する

uncaughtedException.swift

// case 1
//AppDelegate#application:didFinishLaunchingWithOptions
NSSetUncaughtExceptionHandler {e in
  print(">>>>> ExceptionHandler OK")
  let log = NSString(format:"%@, %@", e.name, e.reason!)
  NSUserDefaults.standardUserDefaults().setValue(log, forKey: "failLog")
}
// case 2
// Closureを渡さなくても、swift関数の関数名を渡しても良い。ただし、NSSetUncaughtExceptionHandlerと同じスコープ内に
// swift関数が無いとコンパイルエラー⁉️
  func exceptionHandler( exception: NSException) {
    print("exceptionHandler func2")
    let log = NSString(format:"%@, %@, %@", exception.name, exception.reason!, exception.callStackSymbols)
    NSUserDefaults.standardUserDefaults().setValue(log, forKey: "failLog")
  }
    NSSetUncaughtExceptionHandler(exceptionHandler)
// case 3
// swiftの関数ではなくObj-Cの関数を渡す事もできる。
// Uncaught.m
#import "Uncaught.h"
// How should I use NSSetUncaughtExceptionHandler in Swift - Stack Overflow
volatile void exceptionHandler(NSException *exception) {
  NSLog(@"in Obj-C exceptionHandler");
  NSString *log = [NSString stringWithFormat:@"%@, %@", exception.name, exception.reason];
//  NSString *log = [NSString stringWithFormat:@"%@, %@, %@", exception.name, exception.reason, exception.callStackSymbols];
  [[NSUserDefaults standardUserDefaults] setValue:log forKey:@"failLog"];
  
}
NSUncaughtExceptionHandler *exceptionHandlerPtr = &exceptionHandler;
// Uncaught.h
#import <Foundation/Foundation.h>

extern NSUncaughtExceptionHandler *exceptionHandlerPtr;//Swiftに公開する変数だよ！
volatile void exceptionHandler(NSException *exceptionHandlerPtr);//mファイルで実装必要な関数だよ！

//ErrHandle-Bridging-Header.h
//
//  Use this file to import your target's public headers that you would like to expose to Swift.
//

#import "Uncaught.h"

⭕️UnCaughtedExceptionを検出するには？
NSSetUncaughtedExceptionHandlerを呼べば良い。こいつに与えるclosureにはNSErrorオブジェクトが飛んで来る。こいつをUserDeafaultへ保存すれば良い。
こんな感じ⁉️
How should I use NSSetUncaughtExceptionHandler in Swift
http://stackoverflow.com/questions/25441302/how-should-i-use-nssetuncaughtexceptionhandler-in-swift