Ok so I am trying to make it when the user flips the cheat mode switch it will disable the answerButton. I did try to set the button to disable near the bottom however it does not appear to do anything. I added the print("") to see if it would print in the console however nothing was printed. I a unsure what is wrong here.
I have pasted my code below.
import Foundation
import UIKit
class SettingsController: UITableViewController {
#IBOutlet weak var cheatSwitch: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
cheatSwitch.isOn = UserDefaults.standard.bool(forKey: "switchState")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func saveSettings(_ sender: UISwitch) {
UserDefaults.standard.set(cheatSwitch.isOn, forKey: "switchState")
UserDefaults.standard.synchronize()
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let mainView : ViewController = segue.destination as! ViewController
if cheatSwitch.isOn == true {
print("turn off button")
mainView.btnAnswer.isEnabled = false;
}
else {
print("turn on button")
mainView.btnAnswer.isEnabled = true;
}
}
}
You are saving the value UISwitch's state in UserDefaults so you can use its value in ViewController's method viewDidApper.
override func viewDidAppear(_ animated: Bool) {
self.btnAnswer.isEnabled = !UserDefaults.standard.bool(forKey: "switchState")
}
Note: There is no need to add prepareForSegue in your SettingsController because it will never called when you press back button of NavigationController so consider to remove it.
Related
import UIKit
class ViewController: UIViewController {
// #IBAction func Btndel(_ sender: Any) {
//}
var Str:String?
override func viewDidLoad() {
super.viewDidLoad()
let items = [Str]
let SegM = UISegmentedControl(items:items as Any as? [Any])
SegM.selectedSegmentIndex = 0
SegM.frame=CGRect(x: 70, y: 130, width: 100, height: 50)
SegM.layer.cornerRadius = 8.0
SegM.backgroundColor = .orange
SegM.tintColor = .white
self.view .addSubview(SegM)
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func Btnadd(_ sender: Any)
{
var Str = 0;Str += 1
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
How to add and delete segments in a viewcontroller by clicking add button an delete button created in the same viewcontroller
How to insert and remove(add or delete) segments in swift4
class ViewController: UIViewController {
#IBOutlet weak var segment1: UISegmentedControl!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func insert(_ sender: Any) {
segment1.insertSegment(withTitle: "\(segment1.numberOfSegments+1)", at: segment1.numberOfSegments, animated: true)
}
#IBAction func remove(_ sender: Any) {
segment1.removeSegment(at: segment1.numberOfSegments-1, animated: true)
}
}
You can insert segment by insertSegment method of UISegmentedControl and you can delete segment by removeSegment method. Let me take an example.
I create segmentController class and its UI in a storyboard.
Below is UI screenshot. In the storyboard, You can see two buttons Insert (+) and Remove (-) and UISegmentedControl. Insert button will insert segment at a specific position and Remove button will remove the segment at a specific position.
Below is code of segmentController class.
class segmentController: UIViewController {
#IBOutlet weak var segementControl: UISegmentedControl!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
#IBAction func remove(_ sender: Any) {
segementControl.removeSegment(at: segementControl.numberOfSegments-1, animated: true)
}
#IBAction func insert(_ sender: Any) {
segementControl.insertSegment(withTitle: "\(segementControl.numberOfSegments+1)", at: segementControl.numberOfSegments, animated: true)
}
}
In the above code, on insert button click new segment will add at the last of segementControl. On remove button click the last segment will delete from segmentControl.
Hope it helps.
I am looking to pass data through a text box, and into an array (Second View Controller), so it can be added to a pool of data and randomly chosen.
For instance, you would input your name (and/or another name) into the text field in the First VC and and it would go into an array that would tell them which color they are shown in the Second VC.
Essentially, I'm trying to pass the data to a variable (which will hold all the names inputed), and append the variable to the array, then click a button to generate and randomly pull from the array via arc4random. My problem is its not appending. Any help would be greatly appreciated.
Here is my code:
VC 1:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func StartTapped(_ sender: Any) {
performSegue(withIdentifier: "SecondViewControllerSegue", sender: self)
}
#IBOutlet weak var AddPlayerTextField: UITextField!
#IBAction func AddTexttoArrayBtn(_ sender: Any) {
if AddPlayerTextField.text == nil
{
performSegue(withIdentifier: "SecondViewControllerSegue", sender: self)
}
func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let SecondViewController = segue.destination as! ViewController2
SecondViewController.myString = AddPlayerTextField.text!
VC 2:
import UIKit
class ViewController2: UIViewController {
var myString = String ()
var TeamBuildingQuestions = [ "is Red", "is Blue", "is Green", "is Purple","is Teal","is Orange", "is Red", "is Grey", "is Pink"]
var MasterTeamBuildingQuestionsArray = [ "Hello", "beep bop bbeep", "Boop", "Bap","Bospop","bob the builder"]
#IBOutlet weak var DisplayArray: UILabel!
#IBAction func NextQuestionBtn(_ sender: Any) {
let RandomArrayNumber = Int (arc4random_uniform(UInt32(TeamBuildingQuestions.count)))
let QuestionDisplayed = TeamBuildingQuestions[RandomArrayNumber]
DisplayArray?.text = QuestionDisplayed
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
TeamBuildingQuestions.append(myString)
}
In VC2, Instead of didReceiveMemoryWarning, implement TeamBuildingQuestions.append(myString) in viewDidLoad.
Here is a bug:
if AddPlayerTextField.text == nil{
}
should be
if AddPlayerTextField.text != nil && AddPlayerTextField.text.count > 0{
}
Effect I Wish to Replicate
Example 1) https://youtu.be/EgU7BfOJ3BE
Example 2) https://youtu.be/kfBzZeGRSa0
In both examples, the user taps on a bar button item located in the navigation bar, and the List view controller segues to the Map view controller using the Flip Horizontal transition.
I have tried using container views, but cannot seem to get this working (I always get a full screen transition, rather than only the container view transitioning).
Any help is greatly appreciated!!!
Edit
Here is my attempt so far (link to the full Xcode project).
ParentVC (one with navigation bar):
import UIKit
protocol ButtonPressedDelegate
{
func buttonPressed(passedData:Bool)
}
class ParentViewController: UIViewController
{
var delegate:ButtonPressedDelegate? = nil
var switchValue:Bool = true
var childViewController:ChildViewController?
override func viewDidLoad()
{
super.viewDidLoad()
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
}
#IBAction func switchButtonPressed(_ sender: Any)
{
if switchValue
{
switchValue = false
}
else
{
switchValue = true
}
childViewController?.buttonPressed(passedData: switchValue)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == "parentToChild"
{
childViewController = segue.destination as? ChildViewController
childViewController?.buttonPressed(passedData: switchValue)
}
}
}
ChildVC:
import UIKit
class ChildViewController: UIViewController, ButtonPressedDelegate
{
override func viewDidLoad()
{
super.viewDidLoad()
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
}
func buttonPressed(passedData: Bool)
{
if passedData
{
print("Show Blue")
performSegue(withIdentifier: "showBlue", sender: self)
}
else
{
print("Show Red")
performSegue(withIdentifier: "showRed", sender: self)
}
}
}
I am trying to pass data between my two view controllers in my UIscrollview. I am trying to use delegation to send data between Viewcontroller1 and Viewcontroller2. The delegate is Viewcontroller, while the delegator is Viewcontroller1 and Viewcontroller2.
In the code posted below, when the switch in Viewcontroller1 is toggled, it makes the switch in Viewcontroller2 put to the "off" state. I keep on getting the
fatal error: unexpectedly found nil while unwrapping an Optional value
error when I run it, but I have no clue what is causing this problem. Any ideas why?
Below is the Viewcontroller that contains the Uiscrollview and the subviews/childviews
import UIKit
class ViewController: UIViewController, testing {
var vc1 = ViewController1(nibName: "ViewController1", bundle: nil)
var vc2 = ViewController2(nibName: "ViewController2", bundle: nil)
#IBOutlet weak var scrollView: UIScrollView!
func test1() {
vc2.switch2.on = false
}
override func viewDidLoad() {
super.viewDidLoad()
self.addChildViewController(vc1)
self.scrollView.addSubview(vc1.view)
vc1.didMoveToParentViewController(self)
var frame1 = vc2.view.frame
frame1.origin.x = self.view.frame.size.width
vc2.view.frame = frame1
self.addChildViewController(vc2)
self.scrollView.addSubview(vc2.view)
vc2.didMoveToParentViewController(self)
self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width * 2, self.view.frame.size.height);
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
here is the Viewcontoller1 code
protocol testing{
func test1()
}
class ViewController1: UIViewController {
var delegate:testing?
#IBOutlet weak var switch1: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
let vc = ViewController()
self.delegate = vc
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func switch1toggled(sender: AnyObject) {
delegate?.test1()
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
and here is the Viewcontroller 2 code
import UIKit
class ViewController2: UIViewController {
#IBOutlet weak var switch2: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func switch2toggled(sender: AnyObject) {
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
sorry for the long post, I have been stuck for a week on how to change the state of another switch from toggling a switch in another class, and this was the most efficient way that I found
Try This:
ViewController1
class ViewController1: UIViewController {
let defaults = NSUserDefaults.standardUserDefaults()
let switch1Key = "view1Switch"
override func viewWillAppear(animated: Bool) {
view1Switch.on = defaults.boolForKey(switch1Key)
}
#IBOutlet weak var view1Switch: UISwitch!
#IBAction func view1SwitchChanged(sender: UISwitch) {
defaults.setBool(view1Switch.on, forKey: switch1Key)
}
}
ViewController2
class ViewController2: UIViewController {
let defaults = NSUserDefaults.standardUserDefaults()
let switch1Key = "view1Switch"
override func viewWillAppear(animated: Bool) {
view2Switch.on = defaults.boolForKey(switch1Key)
}
#IBOutlet weak var view2Switch: UISwitch!
#IBAction func view2SwitchChanged(sender: UISwitch) {
defaults.setBool(view2Switch.on, forKey: switch1Key)
}
}
This method syncs the state of the two UISwitches using viewWillAppear and NSUserdefaults. The basic thought pattern is that you save the state of the switch to NSUserdefaults so that when either ViewController1 or ViewController2 is instantiated the view1Switch or view2Switch outlet's .on property is set to the saved value.
Caveats:
The first value for the switch when ViewController1 is instantiated (in the first app run) will be off because boolForKey returns false when there is no saved value. This can be hacked by using view1Switch.on = true directly after view1Switch.on = defaults.boolForKey(switch1Key)
This method makes the switches have the same value. In order to make them have different values, you can use a ! operator like so in ViewController2 view2Switch.on = !defaults.boolForKey(switch1Key). This way switch 1 will always be the opposite of switch 2.
I recommend this method over delegation because, while delegation is powerful, its power doesn't seem needed here.
If you have any questions please ask! :D
I am creating an iOS application in which I want to perform an assignment action in button press before running the method prepareForSegue.
I created all controls using Main Story board.
The order of execution for some buttons is
button press action -> prepareForSegue
but for some buttons it is
prepareForSegue-> button press action
How to change the order for second set of buttons?
Here is the code I am using:
import UIKit
class SummaryViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
var button_prsd = "none"
#IBAction func people_insights(sender: AnyObject) {
button_prsd = "people_insights"
}
#IBAction func industry_research(sender: AnyObject) {
button_prsd = "industry_research"
}
#IBAction func holidays_events(sender: AnyObject) {
button_prsd = "holidays_events"
}
#IBAction func monthly_spotlights(sender: AnyObject) {
button_prsd = "monthly_spotlights"
}
#IBAction func blog(sender: AnyObject) {
button_prsd = "blog"
}
#IBAction func about_us(sender: AnyObject) {
button_prsd = "about_us"
print("button press about us executed")
}
#IBAction func settings(sender: AnyObject) {
button_prsd="settings"
print("button press settings executed")
}
#IBAction func quiz(sender: AnyObject) {
button_prsd="quiz"
print("button press quiz executed")
}
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
let next_view = segue.destinationViewController
if(next_view is DetailViewController)
{
let det_view = next_view as! DetailViewController
det_view.link = button_prsd
print("segue executed")
} else if(next_view is DetailTableViewController)
{
let det_view = next_view as! DetailTableViewController
print("segue executed")
}
}
}
I figured out the problem, when give then code in this way, the execution is just alphabetical order, all the other methods were getting executed before prepareForSegue because the methods come above in alphabetical order
When I renamed the quiz and settings methods as a_quiz and a_settings, it worked