I have a runtime error: Thread 1: EXC_BreakPoint(cod=EXC_I1386_BPT,subcode=0x0)
I did not set any breakpoint inside Xcode. From the debugger,error is due to PrepareForSegue that stops a thread "swift_dynamicCastClassUnconditional"
BarTableViewController1 Class
#IBAction func solve_PressedBar(sender: AnyObject) {
self.performSegueWithIdentifier("SolveBar", sender: sender)
}
override func prepareForSegue ( segue: UIStoryboardSegue, sender: AnyObject!) {
if (segue.identifier == "SolveBar") {
var svcBar = segue.destinationViewController as BarTableViewController2
for items in textField1 {
length.append((items as NSString).floatValue)
}
for items in textField2 {
youngMod.append((items as NSString).floatValue)
}
for items in textField3 {
diameter.append((items as NSString).floatValue)
}
for items in textField4 {
forceBarWall.append((items as NSString).floatValue)
}
self.funcForceBarWall()
println("variables are from TableViewController2")
println(self.length)
println(self.youngMod)
println(self.forceBarWall)
println(self.diameter)
svcBar.length2 = self.length
svcBar.youngMod2 = self.youngMod
svcBar.diamter2 = self.diameter
svcBar.forceBarWall2 = self.forceBarWall
println("testing from bar viewcontroller1")
}
}
}
I'd look here first:
var svcBar = segue.destinationViewController as BarTableViewController2
Check your storyboard and make sure that the segue does connect to a BarTableViewController2 item. Sometimes when dragging, I connect the segue to something else accidentally.
Related
I am trying to implement a custom appearing/disappearing animation for a modal UIViewController in my app.
I have published the code showing this error here.
Here is the content related:
/// The view controller from which I'm trying to display the modal
class ViewController: UIViewController {
#IBAction func tapped() {
/// The modal showing
ModalTestViewController.show()
}
//...
}
/// The displayed modal
open class ModalTestViewController: TransitioningModalViewController {
init() {
super.init(nibName: "ModalTestViewController", bundle: .main)
transitioningDelegate = self
// 1. when I put transitioningDelegate here, case 1
}
public required init?(coder: NSCoder) {
fatalError()
}
open override func viewDidLoad() {
super.viewDidLoad()
// 2. if I put transitioningDelegate here, case 2
}
#IBAction func tapped() {
// a tap on the overlayView of my modal
dismiss(animated: true)
}
static func show() {
let modal = ModalTestViewController()
modal.modalPresentationStyle = .overCurrentContext
DispatchQueue.main.async {
UIApplication.shared.delegate?.window??.rootViewController?.present(modal, animated: true)
}
}
}
/// The default modal view controller, which all modals in my app should inherit
open class TransitioningModalViewController: UIViewController {
// MARK: View Properties
#IBOutlet weak var overlayView: UIView!
}
extension TransitioningModalViewController: UIViewControllerTransitioningDelegate {
public func animationController(
forPresented presented: UIViewController,
presenting: UIViewController,
source: UIViewController
) -> UIViewControllerAnimatedTransitioning? {
return TransitioningModalViewControllerPresenter()
}
public func animationController(
forDismissed dismissed: UIViewController
) -> UIViewControllerAnimatedTransitioning? {
return TransitioningModalViewControllerDismisser()
}
}
private final class TransitioningModalViewControllerPresenter: NSObject, UIViewControllerAnimatedTransitioning {
func transitionDuration(
using transitionContext: UIViewControllerContextTransitioning?
) -> TimeInterval {
return 0.5
}
func animateTransition(
using transitionContext: UIViewControllerContextTransitioning
) {
let toViewController: TransitioningModalViewController = transitionContext.viewController(
forKey: UITransitionContextViewControllerKey.to
) as! TransitioningModalViewController
let duration = transitionDuration(using: transitionContext)
toViewController.overlayView.alpha = 0.0
UIView.animate(
withDuration: duration
) {
toViewController.overlayView.alpha = 0.65
} completion: { result in
transitionContext.completeTransition(result)
}
}
}
private final class TransitioningModalViewControllerDismisser: NSObject, UIViewControllerAnimatedTransitioning {
func transitionDuration(
using transitionContext: UIViewControllerContextTransitioning?
) -> TimeInterval {
return 0.5
}
func animateTransition(
using transitionContext: UIViewControllerContextTransitioning
) {
let fromViewController: TransitioningModalViewController = transitionContext.viewController(
forKey: UITransitionContextViewControllerKey.from
) as! TransitioningModalViewController
let duration = transitionDuration(using: transitionContext)
UIView.animate(
withDuration: duration
) {
fromViewController.overlayView.alpha = 0.0
} completion: { result in
transitionContext.completeTransition(result)
}
}
}
The idea behind this is that the modal appearance should not be the usual bottom-to-top animation, but instead the overlay view should go from hidden to an alpha of 0,65.
Case 1: when I put transitioningDelegate = self in init(), the animation is killed and nothing happens.
Case 2: when I put it into the viewDidLoad(), the appearing animation is the default bottom-to-top one, but the disappearing one is the expecting one (with the overlay view vanishing).
It looks like something is wrong with the initial transitioningDelegate setting but I can't find what.
Thank you for your help!
In your original code, you are setting the delegate here:
open override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
transitioningDelegate = self
}
However, .present(...) is called before viewDidAppear(...), so the controller is presented with default slide-up animation.
Setting the delegate in init() doesn't work, because we have override the default presentation process... and the presented controller's view is never added to the view hierarchy.
This "quick fix" should do the job...
First, in ModalTestViewController, move setting the delegate to init():
init() {
super.init(nibName: "ModalTestViewController", bundle: .main)
transitioningDelegate = self
}
then, in TransitioningModalViewControllerPresenter, add these lines before the animation:
func animateTransition(
using transitionContext: UIViewControllerContextTransitioning
) {
let toViewController: TransitioningModalViewController = transitionContext.viewController(
forKey: UITransitionContextViewControllerKey.to
) as! TransitioningModalViewController
// add these lines \/
// get the "from" view controller
let fromVC = transitionContext.viewController(forKey: .from)!
// get the "to" view controller's view
let toView = transitionContext.view(forKey: .to)!
// set the frame of the "to" view to the initialFrame (the current frame) of the "from" VC
toView.frame = transitionContext.initialFrame(for: fromVC)
// get the transition container view
let container = transitionContext.containerView
// add the "to" view to the view hierarchy
container.addSubview(toView)
// add these lines /\
let duration = transitionDuration(using: transitionContext)
toViewController.overlayView.alpha = 0.0
UIView.animate(
withDuration: duration
) {
toViewController.overlayView.alpha = 0.65
} completion: { result in
transitionContext.completeTransition(result)
}
}
Personally, to make this more flexible, I would get rid of your overlayView and set the alpha on the controller's view itself.
I'm trying to create a Countdown Timer application that runs in the Menu Bar, with no window or dock icon. I've been building this off of mostly tutorials I find online and I know the code is kind of messy (I plan to clean up after it functions properly). The issue I'm running into. In the AppDelegate I create the StatusBar item with no issue, but I can't figure out how to update it from the viewController. It instead is creating a new StatusBar item.
//AppDelegate info
class AppDelegate: NSObject, NSApplicationDelegate
{
let item = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
let popover = NSPopover()
func applicationDidFinishLaunching(_ aNotification: Notification)
{
menuBarRefresh(self)
}
func menuBarRefresh(_ sender: Any?)
{
if let button = item.button
{
button.image = NSImage(named: NSImage.Name("2"))
//button.title = initialTime.stringValue
button.action = #selector(togglePopover(_:))
}
popover.contentViewController = TimerViewController.freshController()
}
#objc func togglePopover(_ sender: Any?)
{
if popover.isShown
{
closePopover(sender: sender)
}
else
{
showPopover(sender: sender)
}
}
func showPopover(sender: Any?)
{
if let button = item.button
{
popover.show(relativeTo: button.bounds, of: button, preferredEdge: NSRectEdge.minY)
}
}
func closePopover(sender: Any?)
{
popover.performClose(sender)
}
//Controller code
import Cocoa
import AVFoundation
//Checking to ensure entered data is numeric
extension String
{
var isNumeric: Bool
{
let range = self.rangeOfCharacter(from: CharacterSet.decimalDigits.inverted)
return (range == nil)
}
}
class TimerViewController: NSViewController
{
//Here's the texts fields for the user to enter content.
#IBOutlet var hourInput: NSTextField!
#IBOutlet var minuteInput: NSTextField!
#IBOutlet var secondInput: NSTextField!
//This is the label used to display the counter
#IBOutlet var initialTime: NSTextField!
//Here are the variables we're going to need
var hours = Int() //Place holder for the hours
var minutes = Int() //Place holder for the hours
var seconds = Int() //Place holder for the hours
var timer = Timer() //The timer we'll use later
var audioPlayer = AVAudioPlayer() //The audio player
var timeRemaining = Int() //Place holder for the total 'seconds' to be counted
var firstRun = Bool()
let item = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
override func viewDidLoad()
{
super.viewDidLoad()
getData() //Pull last saved time from Core Data and load it.
hourInput.stringValue = "\(hours)" //Loading the hours into the hours field
minuteInput.stringValue = "\(minutes)" //Loading the minutes into the minutes field
secondInput.stringValue = "\(seconds)" //Loading the seconds into the seconds field
initialTime.stringValue = "00:00:00" //Resetting the 'counter' to 0
firstRun = true
updateStatusBar(self)
//Here we load up the audio file for the 'done' chime. If not available we print the catch
do
{
let audioPath = Bundle.main.path(forResource: "Done", ofType: "m4a")
try audioPlayer = AVAudioPlayer(contentsOf: URL(fileURLWithPath: audioPath!))
}
catch
{
print("No Joy")
}
/* if let button = item.button
{
button.image = NSImage(named: NSImage.Name("2"))
button.title = initialTime.stringValue
button.action = #selector(togglePopover(_:))
}
*/ }
}
// MARK: Storyboard instantiation
extension TimerViewController
{
static func freshController() -> TimerViewController
{
let storyboard = NSStoryboard(name: NSStoryboard.Name("Main"), bundle: nil)
let identifier = NSStoryboard.SceneIdentifier("TimerViewController")
guard let viewcontroller = storyboard.instantiateController(withIdentifier: identifier) as? TimerViewController
else
{
fatalError("Why can't I find TimerViewController? - Check Main.storyboard")
}
return viewcontroller
}
}
//Button actions follow
extension TimerViewController
{
#IBAction func clearButton(_ sender: Any)
{
clearFields()
timer.invalidate()
audioPlayer.stop()
}
#IBAction func pauseButton(_ sender: Any)
{
timer.invalidate()
}
#IBAction func quitButton(_ sender: Any)
{
exit(0)
}
#IBAction func startButton(_ sender: Any)
{
grabData()
setData()
timeRemaining = (hours*3600)+(minutes*60)+seconds
if timeRemaining <= 0
{
initialTime.stringValue = "Enter Time"
}
else
{
displayTime()
timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(ViewController.startCountDown), userInfo: nil, repeats: true)
clearFields()
updateStatusBar(self)
}
}
}
//MARK: Other Functions
extension TimerViewController
{
func displayTime()
{
let secondsDisplay = String(format: "%02d", (timeRemaining%60))
let minutesDisplay = String(format: "%02d", (timeRemaining%3600)/60)
initialTime.stringValue = "\(timeRemaining/3600):\(minutesDisplay):\(secondsDisplay)"
}
func grabData()
{
hours = hourInput.integerValue
minutes = minuteInput.integerValue
seconds = secondInput.integerValue
}
func clearFields()
{
hourInput.stringValue = ""
minuteInput.stringValue = ""
secondInput.stringValue = ""
initialTime.stringValue = "00:00:00"
}
func setData()
{
setHour()
setMinute()
setSecond()
}
func getData()
{
getHour()
getMinute()
getSecond()
}
#objc func showTimer(_ sender: Any?)
{
print("Are we here")
}
#objc func startCountDown()
{
timeRemaining -= 1
displayTime()
updateStatusBar(self)
print(timeRemaining)
if timeRemaining == 0
{
timer.invalidate()
audioPlayer.play()
}
}
/* func setNeedsStatusBarAppearanceUpdate()
{
button.image = NSImage(named: NSImage.Name("2"))
button.action = #selector(showTimer(_:))
}
*/
func updateStatusBar(_ sender: Any?)
{
if let button = item.button
{
button.image = NSImage(named: NSImage.Name("2"))
button.action = #selector(showTimer(_:))
button.title = initialTime.stringValue
}
//let menu = NSMenu()
//menu.addItem(NSMenuItem(title: "Clear Timer", action: #selector(AppDelegate.theDv2), keyEquivalent: "R"))
//menu.addItem(NSMenuItem(title: "Quit Timer", action: #selector(AppDelegate.quit), keyEquivalent: "Q"))
//item.menu = menu
}
}
//There's a bunch of CoreData stuff after here but I left that out. I'm just using CoreData mainly to learn how to and functional reason is to store and load the last used time
As it currently works, I get two StatusBar items instead of creating one with the AppDelegate then updating that one from the ViewController.
Yup... Id-10-t error here. Just had to declare 'item' outside the class and all is well. After getting some good sleep and time away from the computer I realized I was not declaring 'item' globally.
I'm apparently designing a drag and drop dropbox which can either select files by clicking it or dragging and dropping the files on it, and I want the selected files to be visible in a table next to it. My design logic is that whenever the user selects files from an NSOpenPanel, it passes the selected file paths into the CoreData and then an array retrieves them one by one from the CoreData, and finally, update the NSTableView's content by using reloadData().
Basically, my problem is that whenever I try to call ViewController().getDroppedFiles() from DropboxButton class, I always get a Fatal error: unexpectedly found nil while unwrapping an optional value.
My ViewController.swift:
import Cocoa
class ViewController: NSViewController, NSTableViewDataSource, NSTableViewDelegate {
override func viewDidLoad() {
super.viewDidLoad()
getDroppedFiles()
}
#IBOutlet weak var DroppedFilesTableView: NSTableView!
var droppedFiles: [DroppedFiles] = [] // Core Data class definition: DroppedFiles
func numberOfRows(in tableView: NSTableView) -> Int {
return droppedFiles.count
}
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
let droppedFilesCollection = droppedFiles[row]
if (tableView?.identifier)!.rawValue == "fileNameColumn" {
if let fileNameCell = tableView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "fileNameCell")) as? NSTableCellView {
fileNameCell.textField?.stringValue = droppedFilesCollection.fileName!
return fileNameCell
}
} else if (tableView?.identifier)!.rawValue == "filePathColumn" {
if let filePathCell = tableView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "filePathCell")) as? NSTableCellView {
filePathCell.textField?.stringValue = droppedFilesCollection.filePath!
return filePathCell
}
}
return nil
}
#IBAction func DropboxClicked(_ sender: NSButton) {
// selected file paths
for filePath in selectedFilePaths {
if let context = (NSApp.delegate as? AppDelegate)?.persistentContainer.viewContext {
let droppedFilesData = DroppedFiles(context: context)
droppedFilesData.fileName = getFileName(withPath: filePath)
droppedFilesData.filePath = filePath
do {
try context.save()
} catch {
print("Unable to save core data.")
}
}
getDroppedFiles()
}
}
func getDroppedFiles() {
if let context = (NSApp.delegate as? AppDelegate)?.persistentContainer.viewContext {
do {
try droppedFiles = context.fetch(DroppedFiles.fetchRequest())
} catch {
print("Unable to fetch core data.")
}
}
DroppedFilesTableView.reloadData() // Fatal Error: unexpectedly found nil while unwrapping an optional value (whenever I call this function in other class)
}
}
I'm using a push button (NSButton) as the dropbox (it has its own class), which can easily be clicked and also supports dragging options.
My DropboxButton.swift:
import Cocoa
class DropboxButton: NSButton {
required init?(coder: NSCoder) {
super.init(coder: coder)
registerForDraggedTypes([NSPasteboard.PasteboardType.URL, NSPasteboard.PasteboardType.fileURL])
}
override func draggingEntered(_ sender: NSDraggingInfo) -> NSDragOperation {
// some other codes
return .copy
}
override func draggingExited(_ sender: NSDraggingInfo?) {
// some other codes
}
override func draggingEnded(_ sender: NSDraggingInfo) {
// some other codes
}
override func performDragOperation(_ sender: NSDraggingInfo) -> Bool {
guard let pasteboard = sender.draggingPasteboard.propertyList(forType: NSPasteboard.PasteboardType(rawValue: "NSFilenamesPboardType")) as? NSArray,
let filePaths = pasteboard as? [String] else {
return false
}
for filePath in filePaths {
if let context = (NSApp.delegate as? AppDelegate)?.persistentContainer.viewContext {
let droppedFilesData = DroppedFiles(context: context)
droppedFilesData.fileName = getFileName(withPath: filePath)
droppedFilesData.filePath = filePath
do {
try context.save()
} catch {
print("Unable to save core data.")
}
}
ViewController().getDroppedFiles() // found nil with reloadData() in ViewController.swift
}
return true
}
}
And this is my interface and code logic:
So, how can I reloadData() for the table view in my ViewController class from another class (DropboxButton: NSButton) so that whenever the user drags and drops files into the dropbox, the table view will reload?
P.S. To get this done means a lot to me, I really need to get this fixed in a short time, is there anyone can spend some time and help me?
You need to call getDroppedFiles() on a loaded instance of ViewController.
With ViewController().getDroppedFiles() you're creating a new instance of ViewController that is not shown anywhere (so controls are not initialized resulting in the nil error).
I found this solution useful for my case.
I used observer to pass through data and call functions from other controller classes, now I understand that I was creating a new instance of ViewController which is not loaded. Here is my code:
ViewController.swift:
class ViewController: NSViewController {
// other codes
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(getDroppedFiles), name: NSNotification.Name(rawValue: "reloadTableViewData"), object: nil)
}
#objc func getDroppedFiles() {
DroppedFilesTableView.reloadData()
}
}
DropboxButton.swift:
class DropboxButton: NSButton {
// other codes
override func performDragOperation(_ sender: NSDraggingInfo) -> Bool {
// other codes
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "reloadTableViewData"), object: nil)
return true
}
}
And now, everything works perfectly, I can even add an userInfo: to pass data between files and classes.
I'm making an iOS app, in which i use the inputaccessoryview to the UIViewController,
the problem is
Controller A
class ControllerA: UIViewController {
override var inputAccessoryView: UIView? {
return saveView
}
override var canBecomeFirstResponder: Bool {
return true
}
#IBAction func openVCB(_ sender: UIButton) {
let controllerB = controllerB.instantiate(fromAppStoryboard: .main)
let navigationController = UINavigationController(rootViewController: controllerB)
navigationController.navigationBar.isTranslucent = false
self.present(navigationController, animated: true)
}
}
Controller B
class ControllerB: UIViewController {
override var inputAccessoryView: UIView? {
return nil
}
override var canBecomeFirstResponder: Bool {
return false
}
}
in the controller A the view is working as expected, but in controller B if i opened a keyboard and closed it the AccossoryView it will be visible, and it supposed not to be visible, any ideas?
Full Project InpoutViewTest
Follow this approach:
var shouldBecomeFirstResponder:Bool = false
override var canBecomeFirstResponder: Bool {
return shouldBecomeFirstResponder
}
and don't forget to set this flag to false in viewWillDisappear as well
shouldBecomeFirstResponder = false
I've run into this problem too. Try putting this in your viewWillDisappear(_ animated: Bool) function:
override func viewWillDisappear(_ animated: Bool) {
if let myInputAccessoryView = saveView {
myInputAccessoryView.removeFromSuperview()
}
}
It should remove the input accessory view before transitioning to controller B. Just remember to add the input accessory view back when returning to controller A. You could also try myInputAccessoryView.isHidden = true instead of removeFromSuperview() if you prefer.
I need to open UIPickerView once a user touch a UIButton and to return the text value choosen on UIPickerview to UIButton label.
I'm not able to change the UIButton'n inputview like for UITextField, so making the property writable seems to be the right way. Unfortunatelly nothing happens when the button is touched.
import UIKit
class ABButton: UIButton {
var modInputView: UIView!
override var inputView: UIView { get {
if modInputView != nil {
return modInputView
}
else {
return super.inputView!
}
}}
override func canBecomeFirstResponder() -> Bool {
return true
}
}
class LiczydloViewController: UIViewController {
#IBOutlet weak var buttonTempo10: ABButton!
override func viewDidLoad() {
super.viewDidLoad()
var tempoPicker = UIDatePicker()
buttonTempo10.modInputView = tempoPicker
}
Add an action for touchUpInside for the button, and call button.becomeFirstResponder()
try to set the frame of UIDatePicker. I tried it with luck.
class ZYInputButton: UIButton {
var zyInputView: UIView?
var zyInputAccessoryView: UIView?
override var inputView: UIView? {
get {
return self.zyInputView
}
set {
self.zyInputView = newValue
}
}
override var inputAccessoryView: UIView? {
get {
return self.zyInputAccessoryView
}
set {
self.zyInputAccessoryView = newValue
}
}
override func canBecomeFirstResponder() -> Bool {
return true
}
}