I would like to have the submit button enabled once some fields on a form have been validated. Currently the preview function works great, preview button provides the validation I need. Working on Xcode 7 and swift 2. I would really appreciated if someone can point me in the right direction. Below is the code I currently have:
import Cocoa
#NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
var projectFlag = false
var descriptionFlag = false
var releaseFlag = false
// Fields
#IBOutlet weak var projectNumberTextField:NSTextField!
#IBOutlet weak var projectDescriptionTextField:NSTextField!
#IBOutlet weak var releaseFolderNameTextField:NSTextField!
#IBOutlet weak var passwordTextField:NSTextField!
// Labels for preview
#IBOutlet weak var label1: NSTextField!
#IBOutlet weak var label2: NSTextField!
#IBOutlet weak var label3: NSTextField!
#IBOutlet weak var label4: NSTextField!
#IBOutlet weak var label5: NSTextField!
// Quit Button :: Quits the application
#IBAction func quitButton(sender: AnyObject) {
NSApplication.sharedApplication().terminate(self)
}
// Preview button behavior
#IBAction func previewButton(sender: AnyObject) {
// Project Number ::
let project = projectNumberTextField.stringValue
label1.stringValue = "\(project)"
if (label1.stringValue == "00-0000") {
label1.stringValue = "Project Number is not valid"
label1.textColor = NSColor.redColor()
projectFlag = false
} else {
label1.textColor = NSColor.blackColor()
projectFlag = true
}
// Project Description :: Name, 2016
let description = projectDescriptionTextField.stringValue
label2.stringValue = "\(description)"
if (label2.stringValue == "Name, 2016") {
label2.stringValue = "Enter a valid project description"
label2.textColor = NSColor.redColor()
descriptionFlag = false
} else {
label2.textColor = NSColor.blackColor()
descriptionFlag = true
}
// Folder Release Name :: RELEASE_NAME
let release = releaseFolderNameTextField.stringValue
label3.stringValue = "\(release)"
if (label3.stringValue == "RELEASE_NAME") {
label3.stringValue = "Enter a valid folder release name"
label3.textColor = NSColor.redColor()
releaseFlag = false
} else {
label3.textColor = NSColor.blackColor()
releaseFlag = true
}
// Password :: If needed
let password = passwordTextField.stringValue
label4.stringValue = "\(password)"
// Preview :: Code format for txt file
let preview = "\(project)|"+"\(description)|"+"\(release)|"+"\(password)/"
label5.stringValue = "\(preview)"
}
// Submit button behavior
#IBAction func submitButton(Sender: AnyObject) {
}
func applicationDidFinishLaunching(aNotification: NSNotification) {
// Insert code here to initialize your application
}
func applicationWillTerminate(aNotification: NSNotification) {
// Insert code here to tear down your application
}
}
Related
This question already has answers here:
How to remove optional text from json Result In swift
(3 answers)
Optional Text in Alert in ResetPassword - iOS Project using Swift
(2 answers)
Closed 1 year ago.
So I'm using firebase Authentication in my ios app, and I want to display the email address, and Username in UIlabels on a viewcontroller. But when i display the value of Auth.auth().email on a UIlabel, the Label would show Optional"email adress".How do i get rid of the Optional and also how to allow the user to have a display name in firebase Authentication?
import Firebase
import FirebaseAuth
class ProfileViewController: UIViewController {
#IBOutlet weak var profiepic: UIImageView!
#IBOutlet weak var UsernameLabel: UILabel!
#IBOutlet weak var EmailLabel: UILabel!
#IBOutlet weak var league: UILabel!
#IBOutlet weak var Achievements: UIButton!
#IBOutlet weak var resetpasswd: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
UsernameLabel.layer.borderColor = UIColor.black.cgColor
EmailLabel.layer.borderColor = UIColor.black.cgColor
league.layer.borderColor = UIColor.black.cgColor
Achievements.layer.cornerRadius = 55/2
resetpasswd.layer.cornerRadius = 55/2
resetpasswd.layer.borderColor = UIColor.black.cgColor
displayinfo()
}
func displayinfo() {
let user = Auth.auth().currentUser
if let user = user {
// The user's ID, unique to the Firebase project.
// Do NOT use this value to authenticate with your backend server,
// if you have one. Use getTokenWithCompletion:completion: instead.
let email = user.email
let photoURL = user.photoURL
EmailLabel.text = "Email: \(email)"
// ...
}
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destination.
// Pass the selected object to the new view controller.
}
*/
}
You need to use if or guard to display string info properly.
Using if:
func displayinfo() {
let user = Auth.auth().currentUser
if let user = user {
if let email = user.email {
EmailLabel.text = "Email: \(email)"
}
if let photoURL = user.photoURL {
...
}
// ...
}
}
Using guard:
func displayinfo() {
guard let user = Auth.auth().currentUser else {
print("No user info found")
return
}
if let email = user.email {
EmailLabel.text = "Email: \(email)"
//EmailLabel.text = "Email: " + email
}
if let photoURL = user.photoURL {
...
}
// ...
}
Let me know if you have any issue in these solutions.
Apart from this, I would rather write UIViewController in this manner which seems to be a more clearer approach.
class ProfileViewController: UIViewController {
#IBOutlet weak var profiepic: UIImageView!
#IBOutlet weak var lblUsername: UILabel! {
didSet {
lblUsername.layer.borderColor = UIColor.black.cgColor
}
}
#IBOutlet weak var lblEmail: UILabel! {
didSet {
lblEmail.layer.borderColor = UIColor.black.cgColor
}
}
#IBOutlet weak var lblLeague: UILabel! {
didSet {
lblLeague.layer.borderColor = UIColor.black.cgColor
}
}
#IBOutlet weak var btnAchievements: UIButton! {
didSet {
btnAchievements.layer.cornerRadius = 55/2
// For button height, instead of 55 here you can use, btnAchievements.bounds.height / 2 or use constrain also to change button height when bound changes
}
}
#IBOutlet weak var btnReset: UIButton! {
didSet {
btnReset.layer.cornerRadius = 55/2
btnReset.layer.borderColor = UIColor.black.cgColor
}
}
private var currentUser: AuthUser? {// Type of Auth.auth().currentUser
didSet {
// Use above code for displayInfo or simply call displayInfo from here
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.currentUser = Auth.auth().currentUser
}
...
}
I hope this would help you designing other UIViewControllers as well.
I am trying to add a label to my calculator where it shows the tip amount but I keep getting
Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value
I just want it to display the tip amount as well. I copied it exact for the other UILabel.
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var PriceTxt: UITextField!
#IBOutlet weak var Tip: UITextField!
#IBOutlet weak var totalFinal: UILabel!
#IBOutlet weak var TipAmount: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
totalFinal.text = ""
TipAmount.text = ""
}
#IBAction func Calcualte(_ sender: Any) {
if PriceTxt.text! == "" || Tip.text! == ""
{
totalFinal.text = "Input the Numbers"
TipAmount.text = ""
}
else {
let price = Double(PriceTxt.text!)!
let tipPer = Double(Tip.text!)!
let TipMult = price * (tipPer/100)
let TipFinal = Double((round(100*TipMult)/100) + price)
totalFinal.text = "$\(TipFinal)"
TipAmount.text = "$\(TipMult)"
}
}
}
It will show you the problem in your code.. please always try to avoid force cast
class ViewController: UIViewController {
#IBOutlet weak var PriceTxt: UITextField!
#IBOutlet weak var Tip: UITextField!
#IBOutlet weak var totalFinal: UILabel!
#IBOutlet weak var TipAmount: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
totalFinal.text = ""
TipAmount.text = ""
}
#IBAction func Calcualte(_ sender: Any) {
if let getPrice = PriceTxt.text , let getTip = Tip.text
{
if getPrice.isEmpty || getTip.isEmpty {
totalFinal.text = "Input the Numbers"
TipAmount.text = ""
}
else {
let price = Double(getPrice)!
let tipPer = Double(getTip)!
let TipMult = price * (tipPer/100)
let TipFinal = Double((round(100*TipMult)/100) + price)
totalFinal.text = "$\(TipFinal)"
TipAmount.text = "$\(TipMult)"
}
} else {
print("either PriceTxt or Tip is nil")
}
}
}
Try using ? instead of !
! force unwraps and gives you a fatal error if there is no value (nil). ? only unwraps if a value is present.
Also, why unwrap the text here at all?
Use
PriceTxt.text == "" || Tip.text == "" without the ! or ?.
I am creating an application in Xcode 8 and Swift 3 for use at my place of employment. I am going to give you a brief understanding of what I am doing, and what I am attempting to do. So in my program I load data about the computer, including MAC address and IP Address, which I have working flawlessly. My issue is when I try to refresh the data, it either crashes or does not reload anything.
Now I have read the documentation that specifically says "Do not call viewDidLoad()" but I am not sure how else to reload the data. I have been working on this one little feature for a while, but unfortunately I am still coming up blank and cannot find much more information.
Basically I pull the information and then write them to labels which present the data to the technician. I have attempted to use the refresh function under the view controller, as well as the reload under the first response to no avail. Does anyone have any ideas that I can attempt to reload the data on button click?
Edit 2:
import Cocoa
import Foundation
import NetFS
class ViewController: NSViewController {
// Hostname outlet
#IBOutlet weak var populateHostname: NSTextField!
// IP Address 1 outlet
#IBOutlet weak var populateIPAddr: NSTextField!
#IBOutlet weak var IPAdap1: NSTextField!
// IP Address 2 outlet
#IBOutlet weak var populateIPAddr2: NSTextField!
#IBOutlet weak var IPAdap2: NSTextField!
// MAC Adress 1 outlet
#IBOutlet weak var populateMACAddress: NSTextField!
#IBOutlet weak var MACAdap1: NSTextField!
// MAC Address 2 outlet
#IBOutlet weak var populateMACAddress2: NSTextField!
#IBOutlet weak var MACAdap2: NSTextField!
// OS Version outlet
#IBOutlet weak var osVersion: NSTextField!
// Buttons
#IBOutlet weak var editLoginConfigButton: NSButton!
#IBAction func refresh(_ sender: AnyObject) {
//ViewController.setNeedsDisplay
reloadData()
}
#IBAction func EditLoginConfig(_ sender: AnyObject) {
*Omitted from code - for stackoverflow*
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
loadData()
}
func reloadData() {
//get adapters - includes IP, Adapter Name, and MAC Address
let myInterfaces = getInterfaces()
//ip address
if (myInterfaces.count != 0) {
populateIPAddr.stringValue = myInterfaces[0].addr
IPAdap1.stringValue = myInterfaces[0].name
if (myInterfaces.count != 1) {
if (myInterfaces[0].addr != myInterfaces[1].addr) {
populateIPAddr2.stringValue = myInterfaces[1].addr
IPAdap2.stringValue = myInterfaces[1].name
}
} else {
populateIPAddr2.stringValue = ""
IPAdap2.stringValue = ""
}
}
//mac address
if (myInterfaces.count != 0) {
populateMACAddress.stringValue = myInterfaces[0].mac
MACAdap1.stringValue = myInterfaces[0].name
if (myInterfaces.count != 1) {
if (myInterfaces[0].mac != myInterfaces[1].mac) {
populateMACAddress2.stringValue = myInterfaces[1].mac
MACAdap2.stringValue = myInterfaces[1].name
}
} else {
populateMACAddress2.stringValue = ""
MACAdap2.stringValue = ""
}
}
}
func loadData() {
//hostname
let currentHost = Host.current().localizedName ?? ""
populateHostname.stringValue = currentHost
//get adapters - includes IP, Adapter Name, and MAC Address
let myInterfaces = getInterfaces()
//ip address
if (myInterfaces.count != 0) {
populateIPAddr.stringValue = myInterfaces[0].addr
IPAdap1.stringValue = myInterfaces[0].name
if (myInterfaces.count != 1) {
if (myInterfaces[0].addr != myInterfaces[1].addr) {
populateIPAddr2.stringValue = myInterfaces[1].addr
IPAdap2.stringValue = myInterfaces[1].name
}
} else {
populateIPAddr2.stringValue = ""
IPAdap2.stringValue = ""
}
}
//mac address
if (myInterfaces.count != 0) {
populateMACAddress.stringValue = myInterfaces[0].mac
MACAdap1.stringValue = myInterfaces[0].name
if (myInterfaces.count != 1) {
if (myInterfaces[0].mac != myInterfaces[1].mac) {
populateMACAddress2.stringValue = myInterfaces[1].mac
MACAdap2.stringValue = myInterfaces[1].name
}
} else {
populateMACAddress2.stringValue = ""
MACAdap2.stringValue = ""
}
}
//OS X Version
let osVers = ProcessInfo.processInfo.operatingSystemVersion
let osMajorVers = String(osVers.majorVersion)
let osMinorVers = String(osVers.minorVersion)
let osPatchVers = String(osVers.patchVersion)
osVersion.stringValue = (osMajorVers + "." + osMinorVers + "." + osPatchVers)
// Edit Users Login Config enabled/disabled
if (NSUserName() == "Administrator" || NSUserName() == "administrator") {
// disable button
editLoginConfigButton.isEnabled = false
}
}
override var representedObject: AnyObject? {
didSet {
// Update the view, if already loaded.
}
}
}
So as I said before (I believe), using it like this does not break the thread, but it also does not refresh the data. Any idea where it is failing?
I am creating a OSX app and would like to enable a button when all textfield are filled. But do not have much experience with osx app as there seem to be some difference from ios.
This is what I have tried.
override func viewDidLoad() {
super.viewDidLoad()
btnCalculate.enabled = false
}
override func controlTextDidChange(obj: NSNotification) {
if panelsWideTextField.stringValue.isEmpty {
btnCalculate.enabled = false
} else {
btnCalculate.enabled = true
}
}
Hope someone has a good tip for me :-)
EDIT:
Complete code.
import Cocoa
//import AppKit
class ViewController: NSViewController, NSTextFieldDelegate {
#IBOutlet weak var panelHightTextField: NSTextField!
#IBOutlet weak var panelWidthTextField: NSTextField!
#IBOutlet weak var panelPitchTextField: NSTextField!
#IBOutlet weak var panelsHighTextField: NSTextField!
#IBOutlet weak var panelsWideTextField: NSTextField!
#IBOutlet weak var resWidthLabel: NSTextField!
#IBOutlet weak var resHightLabel: NSTextField!
#IBOutlet weak var lblScreenWidth: NSTextField!
#IBOutlet weak var lblScreenHight: NSTextField!
#IBOutlet weak var lblScreenArea: NSTextField!
#IBOutlet weak var btnCalculate: NSButton!
#IBOutlet weak var lblAmountPanels: NSTextField!
var panelHight = ""
var panelWidth = ""
var panelPitch = ""
var panelsHigh = ""
var panelsWidth = ""
var resWidth : Float = 0
var resHigh : Float = 0
var screenHight : Float = 0
var screenWidth : Float = 0
var screenArea : Float = 0
var ammountPanels : Float = 0
override func viewDidLoad() {
super.viewDidLoad()
btnCalculate.enabled = false
}
override func controlTextDidChange(obj: NSNotification) {
if panelsWideTextField.stringValue.isEmpty {
btnCalculate.enabled = true
} else {
btnCalculate.enabled = false
}
}
override var representedObject: AnyObject? {
didSet {
// Update the view, if already loaded.
}
}
#IBAction func calculateResButton(sender: AnyObject) {
takeUserData()
calculatehight()
calculatewidth()
calculateArea()
calculateAmountPanels()
}
func takeUserData(){
panelHight = panelHightTextField.stringValue
panelWidth = panelWidthTextField.stringValue
panelPitch = panelPitchTextField.stringValue
panelsHigh = panelsHighTextField.stringValue
panelsWidth = panelsWideTextField.stringValue
}
// Calculating resolution and physical hight
func calculatehight(){
let fpanelHight = Float(panelHight)
let fpanelPitch = Float(panelPitch)
let fpanelsHigh = Float(panelsHigh)
resHigh = fpanelHight! * fpanelsHigh! / fpanelPitch!
screenHight = fpanelHight! * fpanelsHigh! / 1_000
printText()
}
// Calculating resolution and physical width
func calculatewidth(){
let fpanelWidth = Float(panelWidth)
let fpanelPitch = Float(panelPitch)
let fpanelsWidth = Float(panelsWidth)
resWidth = fpanelWidth!*fpanelsWidth!/fpanelPitch!
screenWidth = fpanelWidth!*fpanelsWidth! / 1_000
printText()
}
// Calculating sqm of LED screen
func calculateArea(){
let fpanelHight = Float(panelHight)
let fpanelsHigh = Float(panelsHigh)
let fpanelWidth = Float(panelWidth)
let fpanelsWidth = Float(panelsWidth)
screenArea = (fpanelHight! * fpanelsHigh!) * (fpanelWidth! * fpanelsWidth!) / 1_000_000
printText()
}
// Calculating the amount of panels used.
func calculateAmountPanels(){
let fpanelsHigh = Float(panelsHigh)
let fpanelsWidth = Float(panelsWidth)
ammountPanels = (fpanelsWidth! * fpanelsHigh!)
printText()
}
// Outputting text to labels with correct format.
func printText(){
let formatResHigh = String(format: "%0.0f", resHigh)
let formatResWidth = String(format: "%0.0f", resWidth)
let formatScreenHight = String(format: "%0.2f", screenHight)
let formatScreenWidth = String(format: "%0.2f", screenWidth)
let formatScreenArea = String(format: "%0.0f", screenArea)
let formatAmmountPanels = String(format: "%0.0f", ammountPanels)
resHightLabel.stringValue = "\(formatResHigh)px"
resWidthLabel.stringValue = "\(formatResWidth)px"
lblScreenHight.stringValue = "\(formatScreenHight)m"
lblScreenWidth.stringValue = "\(formatScreenWidth)m"
lblScreenArea.stringValue = "\(formatScreenArea) sqm"
lblAmountPanels.stringValue = "\(formatAmmountPanels)"
}
}
I had the same problem but I found simple solution: checkbox can enable and disable NSButton.
import Cocoa
class ViewController: NSViewController {
#IBOutlet weak var btnCalculate: NSButton!
#IBOutlet weak var checkBox: NSButton!
override func viewDidLoad() {
super.viewDidLoad()
btnCalculate.enabled = false
checkBox.state = 0
}
#IBAction func checkAgree(sender: NSButton) {
if btnCalculate.stringValue.characters.count > 0 && checkBox.state == 1 {
btnCalculate.enabled = true
} else {
btnCalculate.enabled = false
}
}
}
here is my code:
let aDisposeBag = DisposeBag()
class LoginController: NSViewController {
#IBOutlet weak var accountField: NSTextField!
#IBOutlet weak var passwdField: NSSecureTextField!
#IBOutlet weak var loginBtn: NSButton!
override func viewDidLoad() {
super.viewDidLoad()
let accAvailable = accountField.rx_text.map({(aa)-> Bool in
print("aa")
return aa.characters.count > 0
})
let passAvailable = passwdField.rx_text.map({(aa)-> Bool in
print("bb")
return aa.characters.count > 0
})
let allAvailable = Observable.combineLatest(accAvailable, passAvailable){$0 && $1}
allAvailable.bindTo(loginBtn.rx_enabled).addDisposableTo(aDisposeBag)
}
}
When I input contents into accountField,nothing prints in the console.
But if I replace allAvailable.bindTo(loginBtn.rx_enabled).addDisposableTo(aDisposeBag) into
allAvailable.subscribeNext { (available) in
print(available)
}.addDisposableTo(aDisposeBag)
Then I can see aa or bb is printed in the console.
Anyone can tell what's wrong with my code,thanks a lot!