Swift

AlertModal.swift

//this is an snippet from previous code on UIALert (show up modal)

    @IBAction func setExpenditure(_ sender: Any) {
        
        let alert = UIAlertController(title: "Description", message: "Edit or cancel", preferredStyle: .alert)
        
        alert.addTextField { (textfield: UITextField) in
            
        }
        
        alert.addAction(UIAlertAction(title: "Set", style: .default, handler: { (alerted : UIAlertAction ) in
            
            if let textFields = alert.textFields{
                
                let theTextFields = textFields as [UITextField]
                if let enteredText = theTextFields[0].text {
                    let budgetAmount = Double(enteredText)!
                    self.budgetAmount.text = "RM\(String(describing: budgetAmount))"
                    self.globalVar.set(budgetAmount, forKey: "budgetAmount")
                }
            }
            
        }))
        alert.addAction(UIAlertAction(title: "Cancel", style: .destructive ))
        self.present(alert, animated: true, completion: nil)
    }

Callback.swift

// this is a callback for asynchronous call
    //this is for api. DO NOT DELETE!
    func fetchData(lastLogsId : Int, completion : @escaping ([Logs]) -> () ) {
        
        var logsArray = [Logs]()
        
        print("going to home Service -> fetch home feed")
        
        let postData = NSMutableData(data: "last_id=\(lastLogsId)".data(using: String.Encoding.utf8)!)
        let headers = ["content-type": "application/x-www-form-urlencoded"]
        let url = URL(string: "https://buku-lima.herokuapp.com/add_more_data")
        var request = URLRequest(url:url!)
        
        request.httpMethod = "POST"
        request.allHTTPHeaderFields = headers
        request.httpBody = postData as Data!
        
        let session = URLSession.shared
        session.dataTask(with: request) { (data, response, error) in
            //if there is no error
            if (error == nil){
                
                let json = try? JSONSerialization.jsonObject(with: data!, options: []) as! [String:AnyObject]
                let results = json!["return"] as! NSArray
                print(results)
                
                for result in results {
                    
                    let key  = (result as! NSDictionary)["amount"] as! String
                    let date = (result as! NSDictionary)["updated_at"] as? String
                    let expensesType = (result as! NSDictionary)["expenses_type"] as? String
                    let id = (result as! NSDictionary)["id"] as? Int
                    let details = (result as! NSDictionary)["details"] as! String
                    
                    
                    let log = Logs(float: Float(key)!, date: date!, expensesType: expensesType!, realDate: NSDate())
                    log.id = id!
                    //untuk masukkan array of descriptions
                    log.convertStringOfArrayIntoArray(stringArray: details)
                    
                    
                    logsArray.append(log)
                    
                }
                completion(logsArray)
            }else{ // if there is an error
                print("ERROR OCCURED: \(String(describing: error))")
            }
            }.resume() //session.dataTask
    }

clear_user_default.swift

        let domain = Bundle.main.bundleIdentifier!
        UserDefaults.standard.removePersistentDomain(forName: domain)
        UserDefaults.standard.synchronize()
        print(Array(UserDefaults.standard.dictionaryRepresentation().keys).count)

hideKeyboardWhenTappedAround.swift

extension UIViewController {

    func hideKeyboardWhenTappedAround() {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
        tap.cancelsTouchesInView = false
        view.addGestureRecognizer(tap)
    }

    func dismissKeyboard() {
//        let point = CGPoint(x: 0,y :0)

        view.endEditing(true)
    }


}