Guard all uses of iOS 10+ classes and APIs with appropriate @available() tests. Declare properties and methods that use iOS 10+ types with appropriate NS_AVAILABLE_IOS() macros. This permits the project to build cleanly with clang's unguarded API warnings set to the aggressive setting:     CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE
Guard all uses of iOS 10+ classes and APIs with appropriate @available()
tests. Declare properties and methods that use iOS 10+ types with
appropriate NS_AVAILABLE_IOS() macros.
This permits the project to build cleanly with clang's unguarded API
warnings set to the aggressive setting:
    CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE

mikebuss/MTBBarcodeScanner,mikebuss/MTBBarcodeScanner,mikebuss/MTBBarcodeScanner