My textFields doesn't disappear when is invoked viewWillAppear method in swift - swift

Question

import UIKit
import Alamofire
import SystemConfiguration
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var simpleLabel: UILabel!
#IBOutlet weak var uiNameSearch: UITextField!
#IBOutlet weak var uiGivenName: UITextField!
var patient1 = Patient!()
override func viewDidLoad() {
super.viewDidLoad()
uiNameSearch.delegate = self
uiGivenName.delegate = self
print("ViewController viewDidLoad")
// Do any additional setup after loading the view, typically from a nib.
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.simpleLabel.center.x -= self.view.bounds.width
self.uiGivenName.center.x -= self.view.bounds.width
print("Call viewWillAppear")
}
override func viewDidAppear(animated: Bool){
super.viewDidAppear(animated)
UIView.animateWithDuration(0.9 , animations: {
// self.simpleLabel.center.x += self.view.bounds.width
self.uiGivenName.center.x += self.view.bounds.width
})
UIView.animateWithDuration(0.7 , delay: 0.7, options: [], animations: {
self.uiNameSearch.center.x += self.view.bounds.width
}, completion: nil )
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func searchForName(sender: UIButton) {
let header = ["Accept" : "application/json"]
let name = uiNameSearch.text!
let given = uiGivenName.text!
if name.characters.count == 0 {
self.view.makeToast( message: "Please insert the family name of the patient!")
} else if given.characters.count == 0 {
self.view.makeToast(message: "Please insert the patient given name!")
} else if checkInternetConnection() == false {
self.view.makeToast(message: "Please connect to the internet!")
} else {
Alamofire.request(.GET, "https://open-ic.epic.com/FHIR/api/FHIR/DSTU2/Patient?family=\(name)&given=\(given)", headers: header).responseJSON { response in
self.patient1 = Patient(response: response.result.value!)
self.performSegueWithIdentifier("showSegue", sender: sender)
}
}
}
func checkInternetConnection() -> Bool {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
}
var flags = SCNetworkReachabilityFlags()
if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
return false
}
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
return (isReachable && !needsConnection)
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
switch textField {
case uiNameSearch:
uiNameSearch.resignFirstResponder()
uiGivenName.becomeFirstResponder()
case uiGivenName:
uiGivenName.resignFirstResponder()
default:
print("")
}
return true
}
override func prepareForSegue(segue: UIStoryboardSegue, sender:AnyObject?){
if segue.identifier == "showSegue" {
if let displayViewController = segue.destinationViewController as? DisplayViewController {
displayViewController.patient1 = patient1
}
}
}
}
I want to make uiGivenName and simpleLabel to disappear until the view is created and after when the viewDidAppear is invoked to appear from the left side.

Answer 1

Your view doesn't disappear because you are changing position of views in viewWillAppear and when viewWillAppear gets called, view is about to be added to view hierarchy(i.e view is still not added to view hierarchy.), so its not reflecting in your UI.
So you can do your stuff in viewDidLayoutSubviews because this is the best place if you want to modify your UI just before it actually appears in the screen.
Edit -
Replace this -
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.simpleLabel.center.x -= self.view.bounds.width
self.uiGivenName.center.x -= self.view.bounds.width
print("Call viewWillAppear")
}
with
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
self.simpleLabel.center.x -= self.view.bounds.width
self.uiGivenName.center.x -= self.view.bounds.width
}