Version Update check

import UIKit

extension String {
    func isNewerThan(update: String) -> Bool {
        
        let arrayDotsStr = self.components(separatedBy: ".")
        var arrayDotsInt: [Int] = []
        
        for char in arrayDotsStr {
            arrayDotsInt.append(Int(char)!)
        }
        
        let arrayDotsStr2 = update.components(separatedBy: ".")
        var arrayDotsInt2: [Int] = []
        
        for char in arrayDotsStr2 {
            arrayDotsInt2.append(Int(char)!)
        }
        
        let smallestArray = arrayDotsInt.count < arrayDotsInt2.count ? arrayDotsInt : arrayDotsInt2
        let otherArray = smallestArray != arrayDotsInt ? arrayDotsInt : arrayDotsInt2
        
        for item in smallestArray {
            
            if item == otherArray[smallestArray.index(of: item)!] {
                
                if smallestArray.count < otherArray.count && smallestArray.index(of: item) == smallestArray.count - 1 {
                    
                    print(otherArray)
                    return otherArray == arrayDotsInt
                }
            } else {
                
                let biggestVersion = item > otherArray[smallestArray.index(of: item)!] ? smallestArray : otherArray
                
                print(biggestVersion)
                return biggestVersion == arrayDotsInt
            }
        }
        print("Equal")
        return false
    }
}

"10.3.5".isNewerThan(update: "10.3.5")