Swift 4

[hyperoslo]

Swift 4

@DavidLari I don't mind fixing what I've done to support iOS 9. I was operating under the assumption that anyone needing a barcode scanner would have abandoned old versions of iOS long ago. I'll make the change to support iOS 9.0 and higher before I submit my PR.

@Patchivic I've already fixed those two errors and figured out why data is no longer read from the camera metadata.

Is everyone ok with iOS 9.3 as the Deployment Target?
That version will support:

• iPhone 4S and greater
• iPod Touch 5th Gen and greater
• iPad 2 and greater

Supporting iOS 8 adds no additional devices.
Supporting iOS 7 adds iPhone 4 and iPod 4. But Xcode 9 can't go back that far anyway.
See https://en.wikipedia.org/wiki/List_of_iOS_devices

Supporting iOS 10.3 Drops the following devices from the above list.

• iPhone 4S
• iPod 5th Gen
• iPad 3rd Gen
  Everything else can run iOS 10.3

Does anyone need those three devices?

[skofgar]

By supporting iOS 9 you have 98% of all iOS devices, so I think choosing iOS 9.x is good.

https://developer.apple.com/support/app-store/

#64

[vadymmarkov]

Sounds great @chadcummings We would love to see your PR 😉

[MohdElBasyouni]

I have made the changes using the Xcode converter itself. But I do have 2 errors for below 2 lines in BarcodeScannerController.swift

1. guard metadataObjects != nil && !metadataObjects.isEmpty else { return }
   Error : Comparing non-optional value of type '[AVMetadataObject]' to nil always returns true

2. code = code.substring(from: index)
   Error : 'substring(from:)' is deprecated: Please use String slicing subscript with a 'partial range from' operator.

But the scanner is no longer reading the data :) :)

[DavidLari]

I hope it's not going to be too hard to backport iOS 9.x support into Chad's version because some of us can't just throw away 9% of our users.

[DavidLari]

Awesome Chad! Thanks!

[MohdElBasyouni]

@chadcummings can you open a PR for your updated code?

[vadymmarkov]

PR made by @chadcummings was successfully merged and version 3.0.0 is out.