I'm new in Swift, and now I'm trying to develop an app. I need to show UITabBarController with 3 tabs. Each tab has the same ViewController (it is custom class, inherited from UIViewController).
Sequence of my actions:
1. Put TabBarController in storyboard, dropped Tab1 and Tab2 which were situateed in it by default, and pointed a custom class (ArchiveTabBarController) and Storyboard ID (ArchiveTabBarVC).
2. Put UITableViewController in storyboard, pointed custom class (ArchiveTableViewController), and pointed storyboard ID (archiveTableVC).
3. Made a custom cell in this TableViewController: pointed a custom class (ArchiveTableViewCell), and pointed identifier (archiveTableViewCell).
4. In my ArchiveTabBarController, I wrote such code:
override func viewWillAppear(_ animated : Bool) {
super.viewWillAppear(animated);
let item1 = ArchiveTableViewController();
item1.archiveType = "";
let item2 = ArchiveTableViewController();
item2.archiveType = "type1";
let item3 = ArchiveTableViewController();
item3.archiveType = "type2";
let controllers = [item1, item2, item3];
self.viewControllers = controllers;
}
override func viewDidLoad() {
super.viewDidLoad();
delegate = self;
}
In my ArchiveTableViewController, in viewDidLoad(), I make GET-Request to load data. Result depends on archiveType.
5. In my mainMenuViewController, I made transition to the ArchiveTabBarController.
And the problem is: when I'm trying to go to the ArchiveTabBar, it fails with error: unable to deque reuasble cell with identifier "archiveTableViewCell". But when I dropped TabBar, and tried to go to the ArchiveTableViewController, it worked fine.
What is my mistake?
So, I tried next:
in my ArchiveTableViewController, in viewDidLoad(), i put next:
tableView.register(UITableViewCell.classForCoder(), forCellReuseIdentifier: "archiveTableViewCell")
And in cellForRowAt, I used standard text field for stanard cell. Everything works fine. So, the problem is in the cell's registration. Anybody can help with it?
Finally, I did this! I read questions custom UITableCellView programmatically using swift and Custom UITableViewCell register class in Swift, and more questions, and decided to try register XIB file. I created TableViewCell from scratch with XIB, and everything works.
Related
Description
I am trying to use NSSegmentedControls to transition between Child ViewControllers. The ParentViewController is located in Main.storyboard and the ChildViewControllers are located in Assistant.storyboard. Each ChildViewController has a SegmentedControl divided into 2 Segments and their primary use is to navigate between the ChildViewControllers. So they are set up as momentaryPushIn rather than selectOne. Each ChildViewController uses a Delegate to communicate with the ParentViewController.
So in the ParentViewController I added the ChildViewControllers as following:
/// The View of the ParentViewController configured as NSVisualEffectView
#IBOutlet var visualEffectView: NSVisualEffectView!
var assistantChilds: [NSViewController] {
get { return [NSViewController]() }
set(newValue) {
for child in newValue { self.addChild(child) }
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do view setup here.
addAssistantViewControllersToChildrenArray()
}
override func viewWillAppear() {
visualEffectView.addSubview(self.children[0].view)
self.children[0].view.frame = self.view.bounds
}
private func addAssistantViewControllersToChildrenArray() -> Void {
let storyboard = NSStoryboard.init(name: "Assistant", bundle: nil)
let exampleChild = storyboard.instantiateController(withIdentifier: "ExampleChild") as! ExampleChildViewController
let exampleSibling = storyboard.instantiateController(withIdentifier: "ExampleSibling") as! ExampleSiblingViewController
exampleChild.navigationDelegate = self
exampleSibling.navigationDelegate = self
assistantChilds = [exampleChild, exampleSibling]
}
So far so good. The ExampleChildViewController has an NSTextField instance. While I am in the scope of the TextField, I can trigger the action of the SegmentedControls. Its navigating forward and backward as it should. But once I leave the scope of the TextField I can still click the Segments, but they are not triggering any action. They should be able to navigate forward and backward even if the TextField is not the current "First Responder" of the application. I think I am missing something out here, I hope anyone can help me with this. I know the problem is not the NSSegmentedControl because I am seeing the same behavior with an NSButton, which is configured as Switch/Checkbox, in the SiblingViewController. I just don't have any idea anymore what I am doing wrong.
It`s my first time asking a question myself here, so I hope the way I am doing is fine for making progress with the solution. Let me know if I can do something better/different or if I need to provide more information about something.
Thanks in advance!
Additional Information
For the sake of completeness:
The ParentViewController itself is embedded in a ContainerView,
which is owned by the RootViewController. I can't imagine this does
matter in any way, but this way we are not missing something out.
I am actually not showing the navigation action, because I want to
keep it as simple as possible. Furthermore the action is not problem,
it does what I want it to do. Correct me if I am wrong with this.
Possible solutions I found while researching, which did not work for me:
Setting window.delegate of the ChildViewControllers to NSApp.windows.first?.delegate
Setting the ChildViewController to becomeFirstResponder in its func viewWillAppear()
visualEffectView.addSubview(self.children[0].view, positioned: NSWindow.OrderingMode.above, relativeTo: nil)
Related problems/topics I found while researching:
Basic segmented control not working
Adding and Removing Child View Controllers
NSSegmentedControl - Odd appearance when placed in blur view
How to set first responder to NSTextView in Swift?
How to use #selector in Swift 2.2 for the first responder
Accessing methods, actions and/or outlets from other controllers with swift
How to use Child View Controllers in Swift 4.0 programmatically
Container View Controllers
issues with container view
Control a NSTabViewController from parent View
How to detect when NSTextField has the focus or is it`s content selected cocoa
SOLUTION
let parentViewControllerInstance = self.parent as! ParentViewController
segmentedControl.target = parentViewControllerInstance
In my case I just had to set the delegate as the target of the sendAction method.
Background
Ok, after hours of reading the AppKit Documentation I am now able to answer my own question.
First, debugging the UI showed that the problem was definitely not in the ViewHierarchy.
So I tried to think about the nature of NSButton and NSSegmentedControl. At some point I noticed that both are subclasses of NSControl.
class NSSegmentedControl : NSControl
class NSButton : NSControl
The AppKit Documentation says:
Discussion
Buttons are a standard control used to initiate actions within your app. You can configure buttons with many different visual styles, but the behavior is the same. When clicked, a button calls the action method of its associated target object. (...) You use the action method to perform your app-specific tasks.
The bold text points to the key of the solution – of its associated target object. Typically I define the action of an control item like this:
button.action = #selector(someFunc(_:))
This causes the NSControl instance to call this:
func sendAction(_ action: Selector?, to target: Any?) -> Bool
Parameter Description from the documentation:
Parameters
theAction
The selector to invoke on the target. If the selector is NULL, no message is sent.
theTarget
The target object to receive the message. If the object is nil, the application searches the responder chain for an object capable of handling the message. For more information on dispatching actions, see the class description for NSActionCell.
In conclusion the NSControl instance, which was firing the action method (in my case the NSSegmentedControl), had no target to send its action to. So it was only able to send its action method across the responder chain - which obviously has been nil while the first responder was located in another view.
I've got a ViewControllerOne. ViewControllerOne is connected via Ctrl-Drag (in storyboard) to a menu-button mBtn (which means I don't know how it is implemented programmatically).
Clicking on this mBtn, a ViewOne appears (present modal). This ViewOne is bound to ViewControllerOne. ViewOne has a button btnOne.
Clicking on btnOne I want ViewOne to be dismissed and ViewTwo to be shown. ViewTwo belongs to ViewControllerTwo and to WindowControllerTwo.
The WindowControllerTwo-ViewControllerTwo-binding is the standard case as created on a new project.
I have the following code in the IBAction for button btnOne in ViewControllerOne:
#IBAction func onbtnOnePressed(sender: AnyObject){
let m_WindowControllerTwo = NSStoryboard(name: NSStoryboard.Name(rawValue: "Main"), bundle: nil).instantiateController(withIdentifier: NSStoryboard.SceneIdentifier("WindowControllerTwo")) as! NSWindowController // I have no custom class for the window controller as I don't really know what I can use it for ...
let m_ViewTwo = WindowControllerTwo.contentViewController as! ViewControllerTwo // my custom class for ViewTwo
m_ViewTwo.attributeIWantToPassToThisView = self.x // an attribute I want to pass from view a to view b
m_WindowControllerTwo.contentViewController = m_ViewTwo // passing the attribute from a to b
m_WindowControllerTwo.showWindow(self) // this does not work
self.dismiss(nil) // see NOTE
}
This code actually does not work. On debugging it step by step, I'm seeing the window/view flickering but not appearing...
NOTE: I could connect the button btnOne with a ctrl-drag to ViewControllerTwo. This works. But then the current ViewOne does not get dismissed!
Question: What am I doing wrong here? In iOS swift this also works. I don't quite get the WindowController stuff, so I'll need your advice on this.
Instead of this: m_WindowControllerTwo.showWindow(self)
use:
let application = NSApplication.shared()
application.runModal(for: wordCountWindow) //this will present WindowControllerTwo modally.
then to close your present controller add this line: PresentWindowControllerName.close()
I'd like to use the NSTabViewController for switching through 6 different Tabs with the toolbar style.
All tabs have in common that they show different aspects of a Customer entity.
Now I want to add aditional NSToolbarItems to the toolbar of the NSTabViewController? But I haven't found a way to access the toolbar.
I also would like to add Space between the ToolbarItems.
Is there a way to do so?
Or how can I add my ViewController from the Storyboard to a NSTabView without using NSTabViewController?
Regards
Oliver
In the meantime I've tried another approach that I thought was more promising but lead to another strange behaviour:
I've created a new NSViewController and put a NSTabView inside. In order to load my already existing ViewControllers I used this
override func viewDidLoad() {
super.viewDidLoad()
let customerController = self.storyboard?.instantiateController(withIdentifier: NSStoryboard.SceneIdentifier("CustomerVCID")) as! CustomerViewController
let servicesController = self.storyboard?.instantiateController(withIdentifier: NSStoryboard.SceneIdentifier("ServicesVCID")) as! ServicesController
customerController.customer = self.customer
servicesController.customer = self.customer
self.tabView.tabViewItems[0].view = customerController.view
self.tabView.tabViewItems[1].view = servicesController.view
}
That indeed worked, but now all my NSButtons that have actions will cause my application to crash.
There is only one toolbar per window. So your NSTabViewController shares it.
Select toolbar mode of NSTabViewController
Override NSWindowController and add your items
Example:
override func windowDidLoad() {
super.windowDidLoad()
window?.toolbar?.insertItem(withItemIdentifier: .print, at: 0)
}
You can always access your toolbar via following path view->window->toolbar
Your only issue is that there is one delegate per NSToolbar. Which means you have to create your custom NSToolbarItem inside NSTabViewController delegate.
override func toolbar(_ toolbar: NSToolbar, itemForItemIdentifier itemIdentifier: NSToolbarItem.Identifier, willBeInsertedIntoToolbar flag: Bool) -> NSToolbarItem? {
if itemIdentifier == .export {
return ExportToolbarItem.new()
} else {
return super.toolbar(toolbar, itemForItemIdentifier: itemIdentifier, willBeInsertedIntoToolbar: flag)
}
}
Remember your are required to call super. This is because underlying method wants to create bindings to view controller.
In case you need actionable buttons in toolbar just add them without calling super.
Sorry for the newbie question but i am really stuck.
I have a UIViewController and 4 tableviews in an app. When i click on a button on the UIViewcontroller it segues to a UITableviewController called "Beach". When the user clicks on a cell of the table, it segues back to the UIViewController and displays the selected cells title as the buttons title. The problem that i am having is when i click on a nother button to a tableview and then clicks on the cell, the previous buttons title sets back to the previous title.
i have a prepare for segue function in the tables view controllers and this returns the selected table title (named : Titleoftable) to the main VC which, the strings.
the way i am currently doing it is to make a NSUserDefault below but the problem still remains the same - The value changes top "" every time i click on another table V---
let path = tableView.indexPathForSelectedRow
let cell = tableView.cellForRowAtIndexPath(path!)
let persistenceStoreKey = "MyStringKey"
let stringToStore = "\((cell?.textLabel?.text!)!)"
// Store data
NSUserDefaults.standardUserDefaults().setObject(stringToStore, forKey: persistenceStoreKey)
NSUserDefaults.standardUserDefaults().synchronize()
// Get data
let myStringt = NSUserDefaults.standardUserDefaults().stringForKey(persistenceStoreKey)
destination.textOfBeach = (myStringt)!
destination.isBeachSelected = true
}
I have been stuck on this problem for ages now! PLEASE HELP!!
PS- I am using swift-2 and Xcode7
Make sure that you are not pushing a new ViewController after you click on the tableview's cell. It gives me the impression that it might be the case since you are seeing only the title of the last cell you pressed.. Make sure you actually pop the tableview's controller instead of pushing a new one.
If you want to keep using NSUserDefaults, you could just call
navigationController?.popViewController(animated: true)
in your cellSelection function, and read the defaults value in the viewWillAppear of the main ViewController.
override func viewWillAppear(_ animated: Bool) {
let userDefault = NSUserDefaults.standard()
if let beachSelection = userDefault.string(forKey: "BeachControllerSelection") {
textOfBeach = beachSelection
isBeachSelected = true
}
//same for the rest of the other table view's selections
}
How can i implement this popup menu in iphone app like a popover in ipad?
EDIT: This is the best at moment: https://github.com/runway20/PopoverView
iOS 8 and later
Beginning with iOS 8, you can use UIPopoverPresentationController for iPhones in addition to iPads.
Setup
Add a UIBarButtonItem to your main View Controller.
Add another View Controller to the storyboard. Change it to the size that you want the popover to be and add any content that you want it to have. For my example I just added a UILabel. If you want a whole menu, then just add a table view or list of buttons.
Add a segue from the bar button item to the view controller that you will use as the popover. Rather than show, choose Present as Popover.
Select the segue in the storyboard and set the identifier to popoverSegue (or whatever string you called it in the code).
In the Attributes inspector for the popover view controller, check Use Preferred Explicit Size and confirm that it is the size you want it to be.
Code
This is the code for the main view controller that has the bar button item in it.
class ViewController: UIViewController, UIPopoverPresentationControllerDelegate {
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "popoverSegue" {
let popoverViewController = segue.destinationViewController
popoverViewController.modalPresentationStyle = UIModalPresentationStyle.Popover
popoverViewController.popoverPresentationController!.delegate = self
}
}
// MARK: - UIPopoverPresentationControllerDelegate method
func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
// Force popover style
return UIModalPresentationStyle.None
}
}
Popover at an arbitrary anchor point
If you want to set the popover to appear somewhere besides a bar button item (on a UIButton for example) then you need to set the sourceView and sourceRect. See this answer for details.
Further reading
The above example comes mostly from the first link.
iPad Style Popovers on the iPhone with Swift
iOS 8 Popover Presentations
UIPopoverPresentationController on iOS 8 iPhone
General overview of popup options in iOS
Have a look at the iPhone UIPopoverController implementation: WEPopover
On iPhone you would generally use a UIActionSheet for a stack of buttons like that. It slides up from the bottom, rather than popping up next to the button, but that's the standard behavior on iPhone.
There is one that is even better than WEPopover. Developed by a company called 50pixels, it is called FPPopover.
You can download FPPopover at https://github.com/50pixels/FPPopover
You would have to manually instantiate a UIView using a custom background image or drawing with transparency, add some UIButtons (or other type of custom view) on top, and also somehow handle all touches outside that view.
Note that is is non-standard UI. An actionsheet would be more HIG compliant.
To get a popover from a right side bar button item on a navigation controller that is part of a tableview controller, the following worked for me for Swift 4 and Xcode 9.
Follow the steps in Suragch answer above (as edited by the Community.)
Do not implement the Segue as shown in the answer above. For some reason, the segue causes the popover to go full screen despite setting the explicit size.
Give your popover view controller a title in Attributes Inspector
Add the following code in the TableView controller where the popup will show.
Modify the string identifier (the one here is referencing a Constant.swift file)
Modify "as! FilterVC" to use the title of the your popover view controller.
/// Shows a filter popover view
#IBAction func filterBtnPressed(_ sender: UIBarButtonItem) {
let popover = storyboard?.instantiateViewController(withIdentifier: FILTER_VC) as! FilterVC
popover.modalPresentationStyle = UIModalPresentationStyle.popover
popover.popoverPresentationController?.backgroundColor = UIColor.green
popover.popoverPresentationController?.delegate = self
popover.popoverPresentationController?.backgroundColor = ColorPalette.Blue.Medium
popover.popoverPresentationController?.sourceView = self.view
popover.popoverPresentationController?.sourceRect = CGRect(x: self.view!.bounds.width, y: 0, width: 0, height: 0)
popover.popoverPresentationController?.permittedArrowDirections = .up
self.present(popover, animated: true)
} }
func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
return UIModalPresentationStyle.none
}
You can check WYPopoverController: https://github.com/sammcewan/WYPopoverController
The screenshot above is not a UIActionSheet. It looks like a simple UIView subclass with custom UIButtons on top of it. So go ahead and create the subclass according to your needs and then add it as a subview to your view every time you need it.