'catch' block is unreachable because no errors are thrown in 'do' block

Asked Nov 08 '19 at 05:10

Active Nov 08 '19 at 05:10

Viewed 4,510 times

I am writing closure with error handling and below is my code, but I am getting a warning "'catch' block is unreachable because no errors are thrown in 'do' block"

enum Result {
case success(r: EmailContentData)
case failure(e: Error)
}

static func getMessageList(index : Int, pageCount: Int, completion : @escaping (Result) -> ())
{
    DispatchQueue.global(qos: .userInteractive).async
        {
            let apiString : String = String(index) + "/" + String(pageCount)
            ApiHelper.sharedSession.post(Constant.API.messagelistApi + apiString, postData: NSDictionary(), methodtype: Constant.API.httpGet) { (isError, data, errorDescription) in
                guard let data = data else { return }
                do {
                    let result = EmailContentData.init(fromDictionary: data.value(forKey:"data") as! NSDictionary)
                    completion(Result.success(r: result))
                } catch let error {
                    completion(Result.failure(e: error ))
                }
            }
    }
}

How to remove this warning and catch errors in my controller?

asked Nov 08 '19 at 05:10

Jata Ram

If there is no `try`, there is nothing to catch. – rmaddy Nov 08 '19 at 05:13
1

then where to add try in this block – Jata Ram Nov 08 '19 at 06:31
1

swift try-catch works differently than other languages(ex: java). if no method or code explicitly throw any error, you don't require do-catch block – Parth Bhuva Nov 08 '19 at 06:33

'catch' block is unreachable because no errors are thrown in 'do' block

0 Answers0