I have searched a lot and but I am not able to find solution for my problem. Seems it is very easy for everyone.
I am trying to create a NSTableView which have NSView cells. But those NSViews will be complicated so I decided to use separate NSViewController for these NSViews so that I can handle actions separately.
Here is what I have done-
This is My StoryBoard-
I am trying to use ViewController for each of cells in NSTableView.
This View is very simple currently(only two labels) but there will be few buttons and image views in future.
the view controller have identifier "rowCell".
I have did this-
extension CMCenterTableViewController:NSTableViewDataSource{
func numberOfRowsInTableView(tableView: NSTableView) -> Int {
return self.conversationData.count
}
func tableView(tableView: NSTableView, viewForTableColumn tableColumn: NSTableColumn?, row: Int) -> NSView?
{
var centralStoryBoard = NSStoryboard(name: "Main", bundle: nil)
var rowCellID: AnyObject? = centralStoryBoard?.instantiateControllerWithIdentifier("rowCell")
var castedView = rowCellID as! CMRowCellView
castedView.view.frame = CGRectMake(self.view.frame.minX, self.view.frame.minY, self.view.frame.width, 75)
(castedView as CMRowCellView).SubjectLable.stringValue = (conversationData[row].valueForKey("subject") as? String)!
(castedView as CMRowCellView).FromLable.stringValue = (conversationData[row].valueForKey("fromAddress") as? String)!
return castedView . view
}
}
This is viewController -
import Cocoa
class CMRowCellView: NSViewController {
#IBOutlet weak var FromLable: NSTextField!
#IBOutlet weak var SubjectLable: NSTextField!
var from:String?
var subject:String?
override func viewDidLoad() {
super.viewDidLoad()
// Do view setup here.
}
}
This works Ok but there is slowness in scroll because views are loaded each time and they are not being reused.
My problem is I want to reuse these view with makeViewWithIdentifier, But I can't find a way to do so.
And also Is it correct way to use view controllers in NSTableView?
Thanks for your help.
Related
I am having an issue getting one simple variable from one class to another and it is beyond extremely frustrating :/...
Here is the deal I have two view controller classes named: ViewController.swift and ViewController2.swift
ViewController.swift is linked to a storyboard that has sort of an inventory bag that I have placed which is just an image. Then there is an #IBAction for when you click on the bag it opens up and the second storyboard pops into view. This is controlled by ViewController2.swift. All I am looking to do is simply pass the center of the bag image from ViewController to ViewController2 but I can't seem to get it to work any help would be greatly appreciated.
class ViewController: UIViewController {
#IBOutlet weak var InventoryBag: UIImageView!
var bagCenter:CGPoint = CGPoint(x: 0, y: 0)
override func viewDidLoad() {
super.viewDidLoad()
#IBAction func InventoryButtonTapped(sender: UIButton) {
self.InventoryBag.image = UIImage(named: "backpackimageopen")
bagCenter = self.InventoryBag.center
func transferViewControllerVariables() -> (CGPoint){
return bagCenter
}
When I print the bagCenter from this ViewController it works properly and gives me a correct value. So the bagCenter variable I would like to somehow pass over to ViewController2.swift.
Here is what I tried from ViewController2.swift but it never seems to work and always gives me a 0 rather than the actual value.
class ViewController2: UIViewController {
#IBOutlet weak var HideButton: UIButton!
#IBOutlet weak var InventoryCollection: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
//Load the center of the inventory bag to this view controller to align the hide button.
var bagCenter = ViewController().transferViewControllerVariables()
}
But when I do this it always results in a 0 and I don't get the actual coords of the bag that are showing up in ViewController1.
Create a following variable in ViewController2
var previousViewController: ViewController!
Add following line of code in your ViewController Class
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
if segue.destinationViewController .isKindOfClass(ViewController2){
let vc2 = segue.destinationViewController as! ViewController2
vc2.previousViewController = self
}
}
Now in viewDidLoad method of ViewController2 you can access bagCenter like below:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
var bagCenter = previousViewController.transferViewControllerVariables()
}
Try this in view Controller
class ViewController: UIViewController {
#IBOutlet weak var InventoryBag: UIImageView!
var bagCenter:CGPoint = CGPoint(x: 0, y: 0)
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
#IBAction func InventoryButtonTapped(sender: AnyObject) {
self.InventoryBag.image = UIImage(named:"MAKEUP_SHARE.jpg")
bagCenter = self.InventoryBag.center
performSegueWithIdentifier("Go", sender: self)
}
// Give a segue identifier in storyboard
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "yoursegueidentifier" {
let dvc = segue.destinationViewController as? ViewController2
dvc!.bagCenter = bagCenter
}
}
}
and in view controller2
class ViewController2: UIViewController {
var bagCenter:CGPoint!
override func viewDidLoad() {
super.viewDidLoad()
print(bagCenter)
}
}
I am new to Mac OSX and with Apple promoting the fact that the bodies of code are becoming similar decided to tell the folk I am writing code for we should be able to do a Mac OSX version. iPhone and iPad versions are all good and about to release second version so no issues there.
So I am subclassing NSWindowController to get access to the Toolbar and worked out how to remove and add items on the toolbar, but for the life of me I can not get one NSViewController (firstViewController) to dismiss and bring up the second NSViewController (secondViewController) in the same NSWindowController.
So the 2 issues are that
1. I want to be able to performSegueWithIdentifier from the first NSViewController in code and
2. bring up the second NSViewController by replacing the first NSViewController in the same NSWindowController.
If I add a button to the firstViewController and put a segue to the secondViewController then when I select the button the secondViewController comes up just fine but in a seperate window not the same NSWindowController that I want it to and the firstViewController does not get replaced but stays in the NSWindowController.
So I know the segue idea will work but its not working in code and when I do insert the segue from a button it works but into a seperate NSViewController that is not part of the NSWindowController.
I am trying to find some programming guide from Apple on the issue but no luck so far.
Here is an overview from my Storyboard:
Here is my NSWindowController subclassed and the func loginToMe2Team is trigger from the NSToolBar and its working just find as the print statements show up on the console.
import Cocoa
class me2teamWindowsController: NSWindowController {
#IBOutlet var mySignUp : NSToolbarItem!
#IBOutlet var myToolbar : NSToolbar!
let controller = ViewController()
override func windowDidLoad() {
super.windowDidLoad()
print("window loaded")
}
override func windowWillLoad() {
print("window will load")
}
#IBAction func logInToMe2Team(sender: AnyObject){
controller.LogIn() //THIS IS THE FUNC I AM TESTING WITH
}
#IBAction func signUpToMe2Team(sender: AnyObject){
controller.signUp()
}
Here is my NSViewController subclassed with the func LogIn. Its getting selected just fine but the performSegueWithIdentifier is not. And I did cut and past the Identifier to make absolutely sure it was the same.
import Cocoa
import WebKit
class ViewController: NSViewController {
#IBOutlet weak var theWebPage: WebView!
#IBOutlet weak var progressIndicator: NSProgressIndicator!
override func viewDidLoad() {
super.viewDidLoad()
let urlString = "https://thewebpage.com.au"
self.theWebPage.mainFrame.loadRequest(NSURLRequest(URL: NSURL(string: urlString)!))
}
override func viewDidAppear() {
}
func LogIn() {
print("I logged in")
self.performSegueWithIdentifier("goToTeamPage", sender: self)
//THIS IS THE BIT THATS NOT WORKING
}
func signUp() {
print("I have to sign up now")
}
override var representedObject: AnyObject? {
didSet {
}
}
func webView(sender: WebView!, didStartProvisionalLoadForFrame frame: WebFrame!)
{
self.progressIndicator.startAnimation(self)
}
func webView(sender: WebView!, didFinishLoadForFrame frame: WebFrame!)
{
self.progressIndicator.stopAnimation(self)
}
}
You need to use a custom segue class (or possibly NSTabViewController if it’s enough for your needs). Set the segue’s type to Custom, with your class name specified:
…and implement it. With no animation, it’s simple:
class ReplaceSegue: NSStoryboardSegue {
override func perform() {
if let src = self.sourceController as? NSViewController,
let dest = self.destinationController as? NSViewController,
let window = src.view.window {
// this updates the content and adjusts window size
window.contentViewController = dest
}
}
}
In my case, I was using a sheet and wanted to transition to a different sheet with a different size, so I needed to do more:
class ReplaceSheetSegue: NSStoryboardSegue {
override func perform() {
if let src = self.sourceController as? NSViewController,
let dest = self.destinationController as? NSViewController,
let window = src.view.window {
// calculate new frame:
var rect = window.frameRectForContentRect(dest.view.frame)
rect.origin.x += (src.view.frame.width - dest.view.frame.width) / 2
rect.origin.y += src.view.frame.height - dest.view.frame.height
// don’t shrink visible content, prevent minsize from intervening:
window.contentViewController = nil
// animate resizing (TODO: crossover blending):
window.setFrame(window.convertRectToScreen(rect), display: true, animate: true)
// set new controller
window.contentViewController = dest
}
}
}
could anyone tell me how to get the index of a cell inside its class which is uitableViewCell more specifically , inside an action function of UISwitch .
I did the following..
var cell = sender.superview?.superview as UITableViewCell
var table: UITableView = cell.superview as UITableView
let indexPath = table.indexPathForCell(cell)
but then it crashes.
what is the solution ?
Try this:
Assuming you have a UISwitch *cellSwitch object in cell custom class
In cellForRowAtIndexPath:
cell.cellSwitch.tag = indexPath.row
In IBAction for this switch:
let indexPath = NSIndexPath(forRow: sender.tag, inSection: 0)
You don't want to know the index path of the cell inside of the cell. The index path is an implementation detail of the UITableViewController. The cell should be an independent object.
What you really want to do is to assign an action to run when your switch is changed.
class MySwitchCell: UITableViewCell {
#IBOutlet weak var switchCellLabel: UILabel!
#IBOutlet weak var mySwitch: UISwitch!
//Declare an action to be run
var action: ((sender: UISwitch) -> Void)?
//then run it
#IBAction func switchAction(sender: UISwitch) {
action?(sender: sender)
}
}
Then give the action something to do when you configure the cell.
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("SwitchCell", forIndexPath: indexPath) as! MySwitchCell
cell.switchCellLabel.text = items[indexPath.row]
cell.mySwitch.on = NSUserDefaults.standardUserDefaults().boolForKey(items[indexPath.row])
cell.action = { [weak self] sender in
if let tableViewController = self {
NSUserDefaults.standardUserDefaults().setBool(sender.on, forKey: tableViewController.items[indexPath.row]) }
}
return cell
}
For example this one sets a bool in the NSUserDefaults based on the state of that switch.
You can checkout the whole sample project from https://github.com/regnerjr/SimpleCellSwitchAction
Stepper problem when cells need scroll.
My_TableViewCell.swift
import UIKit
class My_TableViewCell: UITableViewCell {
#IBOutlet weak var My_Label1: UILabel!
#IBOutlet weak var My_Label2: UILabel!
#IBOutlet weak var My_Stepper: UIStepper!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
...
My_TableViewController.swift
import UIKit
var My_Ids = ["C01","C02","C03","C04","C05","C06","C07","C08","C09","C10"]
var My_Values = ["0","0","0","0","0","0","0","0","0","0"]
class My_TableViewController: UITableViewController {
#IBAction func My_Stepper(sender: AnyObject) {
let point = sender.convertPoint(CGPointZero, toView: tableView)
let indexPath = self.tableView.indexPathForRowAtPoint(point)!
let cell = self.tableView.cellForRowAtIndexPath(indexPath) as! My_TableViewCell
cell.My_Label2.text = "\(Int(cell.My_Stepper.value))"
}
...
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return My_Ids.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell =
self.tableView.dequeueReusableCellWithIdentifier(
"My_TableCell", forIndexPath: indexPath)
as! My_TableViewCell
let row = indexPath.row
cell.My_Label1.text = My_Ids[row]
cell.My_Label2.text = "\(Int(cell.My_Stepper.value))"
return cell
}
...
When all cells fit in a "page" the Stepper works well but if the cells are resized and you need scroll the tableview the values are repeated in other cells.
If you alter the value on the cells C06 and C07 this will to reflect C01 and C02 cells and vice-versa.
Please view this image showing the snapshots with the errors
UITableViewController intentionally reuses cells as an optimization. You need to clear the old cell settings as part of your solution. Add a prepareForReuse method to your My_TableViewCell class.
You do this:
- (void) prepareForReuse
{
[super prepareForReuse];
// clear previous cell settings
}
Additional Notes:
recommend against calling cellForRowAtIndexPath directly. See this thread.
recommend you use Pascal casing for class names: Use MyTableViewCell instead of My_TableViewCell.
I am trying to pass data between two viewContollers in an OS X storyboard application using Swift. When I press a button on VC1, it opens VC2, and prepareForSegue is run. However, I can't pass data back to VC1 because a. prepareForSegue isn't being run (because a window isn't being opened) and b. because even if it were, VC1 doesn't know data is being sent and I can't figure out a function (something like viewDidBecomeFocus, if such a function existed) to let it know to look. I feel like there must be a way to do this.
If you know of a way to do this in IOS but not OSX, it could still be useful.
Thanks!
Let assume that in your first ViewController you have one label and one button. When pressed, that button open popover (SecondViewController) with one textfield (and one button what says ready or close etc.), where you want take its value and assign it to your label. That is where delegates and protocols come handy.
SecondViewController:
#objc protocol TextDelegate {
func passedString(textValue: String)
}
class SecondViewController: NSViewController {
#IBOutlet weak var textField: NSTextField!
weak var delegate: TextDelegate?
override func viewDidLoad() {
super.viewDidLoad()
// Do view setup here.
}
#IBAction func closePopOver(sender: AnyObject) {
if delegate != nil {
delegate!.passedString(textField.stringValue)
}
self.dismissViewController(self)
}
}
This is ViewController:
#IBOutlet weak var myLabel: NSTextField!
override func prepareForSegue(segue: NSStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "mySegue" {
let vc = segue.destinationController as! SecondViewController
vc.delegate = self
}
}
func passedString(textValue: String) {
myLabel.stringValue = textValue
}