It crashes on Xcode8 & Swift 3.0.

[showmylym]

The crash position stopped at @UIApplicationMain, and printed following log in console.

invalid mode 'kCFRunLoopCommonModes' provided to CFRunLoopRunSpecific - break on _CFRunLoopError_RunCalledWithInvalidMode to debug. This message will only appear once per execution.
libc++abi.dylib: terminate_handler unexpectedly threw an exception

Present code is

                        let imagePicker = ELCImagePickerController(imagePicker: ())
                        imagePicker?.mediaTypes = [ALAssetTypePhoto]
                        imagePicker?.onOrder = true
                        imagePicker?.maximumImagesCount = canSelectPhotoNum
                        imagePicker?.imagePickerDelegate = self
                        imagePicker?.navigationBar.barTintColor = ColorMainTheme
                        imagePicker?.navigationBar.tintColor = UIColor.white
                        imagePicker?.navigationBar.titleTextAttributes = [NSFontAttributeName: self.titleLabel.font, NSForegroundColorAttributeName: imagePicker?.navigationBar.tintColor]
                        imagePicker?.navigationItem.title = StrPhoto
                        self.present(imagePicker!, animated: true, completion: nil)

[showmylym]

Oh, I got it. The reason of crash is that
imagePicker?.navigationBar.titleTextAttributes = [NSFontAttributeName: self.titleLabel.font, NSForegroundColorAttributeName: imagePicker?.navigationBar.tintColor]
type of titleTextAttributes is [String: Any]?，so that self.titleLabel.font and imagePicker?.navigationBar.tintColor can't be optional type. It won't be crash if force unwrap optional value before use it.