iOS Confronta le versioni


Esempio

let minimumVersionString = "3.1.3"
let versionComparison = UIDevice.current.systemVersion.compare(minimumVersionString, options: .numeric)
switch versionComparison {
    case .orderedSame, .orderedDescending:
        //current version is >= (3.1.3)
        break
    case .orderedAscending:
        //current version is < (3.1.3)
        fallthrough
    default:
        break;
}

Objective-C

NSString *version = @"3.1.3"; 
NSString *currentVersion = @"3.1.1";
NSComparisonResult result = [currentVersion compare:version options:NSNumericSearch];
switch(result){
  case: NSOrderedAscending:
        //less than the current version
  break;
  case: NSOrderedDescending:
  case: NSOrderedSame:
       // equal or greater than the current version
  break;
}