Enter "String!" not compliant with equatable protocol

Question

how to resolve this in fast iOS 8.0 ie Type 'String!' does not conform to protocol 'Equatable'

here is my code

func connection(connection: NSURLConnection, canAuthenticateAgainstProtectionSpace protectionSpace: NSURLProtectionSpace?) -> Bool
{
    return protectionSpace?.authenticationMethod == NSURLAuthenticationMethodServerTrust
// Here I got this error near == sign
}

func connection(connection: NSURLConnection, didReceiveAuthenticationChallenge challenge: NSURLAuthenticationChallenge?)
{
    if challenge?.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust
    {
        if challenge?.protectionSpace.host == "www.myhost.com"

// Here I got this error near == sign

        {
            let credentials = NSURLCredential(forTrust: challenge!.protectionSpace.serverTrust)
            challenge!.sender.useCredential(credentials, forAuthenticationChallenge: challenge)
        }
    }

    challenge?.sender.continueWithoutCredentialForAuthenticationChallenge(challenge)
}

Answer 1

I do not agree with the comments about a simple upgrade to the latest version for the solution. It is best to deploy zero-check options before other comparisons. I would rewrite your code (albeit a little more verbose than necessary) as follows, which should also fix your problem in all versions:

func connection(connection: NSURLConnection, canAuthenticateAgainstProtectionSpace protectionSpace: NSURLProtectionSpace?) -> Bool
{
    if let authenticationMethod = protectionSpace?.authenticationMethod 
    {
        return authenticationMethod == NSURLAuthenticationMethodServerTrust
    }

    return false
}

func connection(connection: NSURLConnection, didReceiveAuthenticationChallenge challenge: NSURLAuthenticationChallenge?)
{
    if let authenticationMethod = challenge?.protectionSpace.authenticationMethod
    {
        if authenticationMethod == NSURLAuthenticationMethodServerTrust
        {
            if challenge?.protectionSpace.host == "www.myhost.com"
            {
                let credentials = NSURLCredential(forTrust: challenge!.protectionSpace.serverTrust)
                challenge!.sender.useCredential(credentials, forAuthenticationChallenge: challenge)
            }
        }
    }

    challenge?.sender.continueWithoutCredentialForAuthenticationChallenge(challenge)
}