I make a simple WKInterface with a switch control and make a function for that switch to show up the value of switch like this:
I don't know why when test the switch,the result I received always false? please explain and show me how to fix. As I thought the out put of that switch will change from false to true and move on like that.. What's wrong in here? or the Xcode's bug with switch?
Here, instead of passing value of type Bool, pass it as a UISwitch:
#IBAction func testSwitchPressed(value: UISwitch) {
println(value.on)
}
This will correctly tell if if your switch is on or off.
This is great because you can use Control Flow as well with this:
#IBAction func testSwitchPressed(value: UISwitch) {
//println(value.on)
if value.on {
println("The switch has been enabled!")
//cool features here
} else {
println("The switch has been disabled!")
//other cool features here
}
}
Good luck!
Try this:
First declare outlet for switch like this:
#IBOutlet weak var mySwitch: UISwitch!
In viewDidLoad implement listener (target-action):
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
mySwitch.addTarget(self, action: "switchChangedValue:", forControlEvents: UIControlEvents.ValueChanged)
}
Declare this function where you will get response every time switch value is changed:
func switchChangedValue(sender:UISwitch){
if sender.isKindOfClass(UISwitch){
if sender.on {
println("Switch is ON")
println("\(sender.on)")
} else {
println("Switch is OFF")
println("\(sender.on)")
}
}
}
the IBAction function passes the UIElement which triggered the action.
So use something like this
#IBAction func testSwitchPressed(sender : UISwitch)
{
println(sender.on)
}
If you press CTRL and drag the mouse in the InterfaceController source code, the following function is automatically added:
-(IBAction)TapOnSwitch:(BOOL)value
{
}
And value is correct.
This is valid if you want check the value when the user change the value of the switch.
Related
I have a fuction, which after a shake, resets all sliders to their defaults and calls -proccesImage after the slider's value has been changed. The problem is that each of the sliders do, in fact, get reset to the default positions but GPUImage does not update the view.
override func motionEnded(motion: UIEventSubtype, withEvent event: UIEvent?)
{
if(event?subtype) == UIEventSubtype.MotionShake{
for slider in sliders!
{
slider.value = myDefault(slider.tag);
sliderValueChanged(slider)
}
}
}
#IBAction func sliderValueChanged(sender: UISlider)
{
switch sender.tag{
case 1:
filter.temperature = CGFloat(sender.value)
case 2:
dliter2.exposure = CGFloat(sender.value)
case 3:
//more cases..
default:print("...")
}
gpuimage?.processImage(); // I know for a fact that this gets called, but doesn't update the view :(
}
Note that I also have an identical functionality attached to UITap gesture. When a user double taps a slider, it goes back to its default value and updates right away. Code below works perfectly fine.
func resetSlider(sender: UITapGestureRecognizer)
{
let tag = (sender.view?.tag)!;
sliders![tag].value = myDefault(tag)
sliderValueChanged(sliders![tag]);
}
So I haven't found a reason why it wasn't updating. But I solved the issue by removing all targets and calling viewWillAppear() after that, so that it would re-add the targets just as if it was a brand new image.
I trying to change Cancel button color in UISearchBar implemented with UISearchController (iOS 8 and greater). This is a code I use:
if self.resultSearchController.active {
for subView in self.resultSearchController.searchBar.subviews {
for subsubView in subView.subviews {
if subsubView.isKindOfClass(UIButton) {
subsubView.tintColor = UIColor.whiteColor()
}
}
}
}
If I paste it in viewDidLoad, it doesn't work, cause I think Cancel button initialize only when SearchController becomes Active.
If I paste code in viewDidLayoutSubviews everything work great, but I'm not sure its a correct way.
So, where I should put this code in TableViewController?
Also, I don't understand, how I can receive notification in my TableViewController that SearchController becomes inactive. In other words where I should put code like this:
if self.resultSearchController.active == false {
//Do something
}
First you should insert delegate methods :-
class HomeViewController: UIViewController,UISearchResultsUpdating, UISearchBarDelegate {
var searchController: UISearchController!
override func viewDidLoad() {
super.viewDidLoad()
searchController = UISearchController(searchResultsController: nil)
searchController.searchResultsUpdater = self
searchController.dimsBackgroundDuringPresentation = false
searchController.searchBar.placeholder = "Search here..."
searchController.searchBar.delegate = self
searchController.searchBar.sizeToFit()
searchController.hidesNavigationBarDuringPresentation = true
tableView.tableHeaderView = searchController.searchBar
searchController.searchBar.tintColor = UIColor.whiteColor()
}
func searchBarTextDidBeginEditing(searchBar: UISearchBar) {
}
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
}
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
}
func updateSearchResultsForSearchController(searchController: UISearchController) {
}
}
then used delegate methods and change cancel button colors and thing what you want
You can try this in AppDelegate's didFinishLaunchWithOptions:.
UIBarButtonItem.appearanceWhenContainedInInstancesOfClasses([UISearchBar.self]).tintColor = UIColor.whiteColor()
PS: This is a generic method and would affect UIBarButtonItem in UISearchBar across app.
Swift 4.2, 4.0+ An answer is added here for a custom search bar that can be customized as below,
You can check the usage of SearchBar class.
I am attempting to present a sheet configuration view (AddSoundEffect) for my main window/view controller (I'm using storyboards), and when the configuration view controller is dismissed, take the values entered in the AddSoundEffect view and pass that back to the main view. My current code in the main view controller:
presentViewControllerAsSheet(self.storyboard!.instantiateControllerWithIdentifier("AddSoundEffect") as! AddSoundViewController
And in the AddSoundViewController.swift file, the code to dismiss it is:
self.dismissViewController(self)
To pass the data, I have a class-independent tuple that I save data to. How do I add a completion handler to presentViewControllerAsSheet, and (optionally) is there a better way to pass the data between view controllers?
Setup: Xcode version 6.4, OS X 10.10.4
Delegation pattern is the easiest way for you.
// Replace this with your tuple or whatever data represents your sound effect
struct SoundEffect {}
protocol AddSoundViewControllerDelegate: class {
func soundViewController(controller: AddSoundViewController, didAddSoundEffect: SoundEffect)
}
//
// Let's say this controller is a modal view controller for adding new sound effects
//
class AddSoundViewController: UIViewController {
weak var delegate: AddSoundViewControllerDelegate?
func done(sender: AnyObject) {
// Dummy sound effect info, replace it with your own data
let soundEffect = SoundEffect()
//
// Call it whenever you would like to inform presenting view controller
// about added sound effect (in case of Done, Add, ... button tapped, do not call it
// when user taps on Cancel to just dismiss AddSoundViewController)
//
self.delegate?.soundViewController(self, didAddSoundEffect: soundEffect)
// Dismiss self
self.dismissViewControllerAnimated(true, completion: {})
}
}
//
// Let's say this controller is main view controller, which contains list of all sound effects,
// with button to add new sound effect via AddSoundViewController
//
class SoundEffectsViewController: UIViewController, AddSoundViewControllerDelegate {
func presentAddSoundEffectController(sender: AnyObject) {
if let addSoundController = self.storyboard?.instantiateViewControllerWithIdentifier("AddSoundEffect") as? AddSoundViewController {
addSoundController.delegate = self
self.presentViewController(addSoundController, animated: true, completion: {})
}
}
func soundViewController(controller: AddSoundViewController, didAddSoundEffect: SoundEffect) {
// This method is called only when new sound effect is added
}
}
Another way is to use closures:
// Replace this with your tuple or whatever data represents your sound effect
struct SoundEffect {}
//
// Let's say this controller is a modal view controller for adding new sound effects
//
class AddSoundViewController: UIViewController {
var completionHandler: ((SoundEffect) -> ())?
func done(sender: AnyObject) {
// Dummy sound effect info, replace it with your own data
let soundEffect = SoundEffect()
//
// Call it whenever you would like to inform presenting view controller
// about added sound effect (in case of Done, Add, ... button tapped, do not call it
// when user taps on Cancel to just dismiss AddSoundViewController)
//
self.completionHandler?(soundEffect)
// Dismiss self
self.dismissViewControllerAnimated(true, completion: {})
}
}
//
// Let's say this controller is main view controller, which contains list of all sound effects,
// with button to add new sound effect via AddSoundViewController
//
class SoundEffectsViewController: UIViewController {
func presentAddSoundEffectController(sender: AnyObject) {
if let addSoundController = self.storyboard?.instantiateViewControllerWithIdentifier("AddSoundEffect") as? AddSoundViewController {
addSoundController.completionHandler = { [weak self] (soundEffect) -> () in
// Called when new sound effect is added
}
self.presentViewController(addSoundController, animated: true, completion: {})
}
}
}
Or many other ways like sending notification, ... Whatever suits your needs. But delegation pattern or closures is the best way to go in this specific case.
I missed that your question is about NSViewController. This example is for iOS, but same pattern can be used on OS X without any issues.
The easiest way to detect sheet opening or closing is to use the Sheet Notifications:
class ViewController: NSViewController, NSWindowDelegate {
override func viewDidLoad(){
NSApplication.sharedApplication().windows.first?.delegate = self
}
func windowDidEndSheet(notification: NSNotification) {
}
func windowWillBeginSheet(notification: NSNotification) {
}
}
I have a NSWindow, on which i apply this:
window.styleMask = window.styleMask | NSFullSizeContentViewWindowMask
window.titleVisibility = NSWindowTitleVisibility.Hidden;
window.titlebarAppearsTransparent = true;
I then add a NSView behind the titlebar to simulate a bigger one.
Now it looks like this:
I want to be able to move the window, by dragging the light-blue view. I have already tried to subclass NSView and always returning true for mouseDownCanMoveWindow using this code:
class LSViewD: NSView {
override var mouseDownCanMoveWindow:Bool {
get {
return true
}
}
}
This didn't work.
After some googling i found this INAppStoreWindow on GitHub. However it doesn't support OS X versions over 10.9, so it's completely useless for me.
Edit1
This is how it looks in the Interface Builder.
How can i move the window, by dragging on this NSView?
None of the answers here worked for me. They all either don't work at all, or make the whole window draggable (note that OP is not asking for this).
Here's how to actually achieve this:
To make a NSView control the window with it's drag events, simply subclass it and override the mouseDown as such:
class WindowDragView: NSView {
override public func mouseDown(with event: NSEvent) {
window?.performDrag(with: event)
}
}
That's it. The mouseDown function will transfer further event tracking to it's parent window.
No need for window masks, isMovableByWindowBackground or mouseDownCanMoveWindow.
Try setting the window's movableByWindowBackground property to true.
There are two ways to do this. The first one would be to set the NSTexturedBackgroundWindowMask as well as the windows background color to the one of your view. This should work.
Otherwise you can take a look at this Sample Code
I somehow managed to solve my problem, i don't really know how, but here are some screenshots.
In the AppDelegate file where i edit the properties of my window, i added an IBOutlet of my contentView. This IBOutlet is a subclass of NSView, in which i've overriden the variable mouseDownCanMoveWindow so it always returns false.
I tried this before in only one file, but it didn't work. This however solved the problem.
Thanks to Ken Thomases and Max for leading me into the right direction.
Swift3.0 Version
override func viewDidAppear() {
//for hide the TitleBar
self.view.window?.styleMask = .borderless
self.view.window?.titlebarAppearsTransparent = true
self.view.window?.titleVisibility = .hidden
//for Window movable with NSView
self.view.window?.isMovableByWindowBackground = true
}
Swift 3:
I needed this but dynamically. It's a little long but well worth it (IMHO).
So I decided to enable this only while the command key is down. This is achieved by registering a local key handler in the delegate:
// MARK:- Local key monitor
var localKeyDownMonitor : Any? = nil
var commandKeyDown : Bool = false {
didSet {
let notif = Notification(name: Notification.Name(rawValue: "commandKeyDown"),
object: NSNumber(booleanLiteral: commandKeyDown))
NotificationCenter.default.post(notif)
}
}
func keyDownMonitor(event: NSEvent) -> Bool {
switch event.modifierFlags.intersection(.deviceIndependentFlagsMask) {
case [.command]:
self.commandKeyDown = true
return true
default:
self.commandKeyDown = false
return false
}
}
which is enabled within the delegate startup:
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Watch local keys for window movenment, etc.
localKeyDownMonitor = NSEvent.addLocalMonitorForEvents(matching: NSEventMask.flagsChanged) { (event) -> NSEvent? in
return self.keyDownMonitor(event: event) ? nil : event
}
}
and its removal
func applicationWillTerminate(_ aNotification: Notification) {
// Forget key down monitoring
NSEvent.removeMonitor(localKeyDownMonitor!)
}
Note that when the commandKeyDown value is changed by the key down handler. This value change is caught by the didset{} to post a notification. This notification is registered by any view you wish to have its window so moved - i.e., in the view delegate
override func viewDidLoad() {
super.viewDidLoad()
// Watch command key changes
NotificationCenter.default.addObserver(
self,
selector: #selector(ViewController.commandKeyDown(_:)),
name: NSNotification.Name(rawValue: "commandKeyDown"),
object: nil)
}
and discarded when the viewWillDisappear() (delegate) or the window controller windowShouldClose(); add this
<your-view>.removeObserver(self, forKeyPath: "commandKeyDown")
So sequence goes like this:
key pressed/release
handler called
notification posted
The view's window isMovableByWindowBackground property is changed by notification - placed within view controller / delegate or where you registered the observer.
internal func commandKeyDown(_ notification : Notification) {
let commandKeyDown : NSNumber = notification.object as! NSNumber
if let window = self.view.window {
window.isMovableByWindowBackground = commandKeyDown.boolValue
Swift.print(String(format: "command %#", commandKeyDown.boolValue ? "v" : "^"))
}
}
Remove the tracer output when happy. See it in action in SimpleViewer on github.
I want to know how you allow an action to be made by either pressing the return key on the software keyboard or by tapping a UIButton.
The UI button is already set up to perform an IBAction.
How do I also allow users to press the return key on the keyboard to perform the same action?
Make sure your class extends the UITextFieldDelegate protocol
SomeViewControllerClass : UIViewController, UITextFieldDelegate
You can perform action as follows:
override func viewDidLoad() {
super.viewDidLoad()
self.textField.delegate = self
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
//textField code
textField.resignFirstResponder() //if desired
performAction()
return true
}
func performAction() {
//action events
}
UPDATE
If your deployment target is iOS 9.0 or later, you can connect the “Primary Action Triggered” event of your text field to an action, like this:
ORIGINAL
Make your view controller adopt the UITextFieldDelegate protocol.
Set your text field's delegate to your view controller.
Implement textFieldShouldReturn: to call your action.
Swift 4.2 :
Other approach for the textfield created programmatically and doesn't need delegate :
MyTextField.addTarget(self, action: #selector(MyTextFielAction)
, for: UIControl.Event.primaryActionTriggered)
And then perform your action like below :
func MyTextFielAction(textField: UITextField) {
//YOUR CODE can perform same action as your UIButton
}
If your deployment target is iOS 9.0 or later, you can connect the “Primary Action Triggered” event of your text field to an action, like this:
I was not able to get the "Primary Action Triggered" to work as suggested. I used "Editing Did End" and that works for now Screenshot of Editing Did End
Here is a complete example, with both:
button-action to write and also to clear label and text when pressing button repeatedly it alternates both actions
return-in-keyboard when pressing key it triggers action and also resigns first responder
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var textField1: UITextField!
#IBOutlet weak var label1: UILabel!
var buttonHasBeenPressed = false
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
textField1.delegate = self
}
#IBAction func buttonGo(_ sender: Any) {
performAction()
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
performAction()
return true
}
func performAction() {
buttonHasBeenPressed = !buttonHasBeenPressed
if buttonHasBeenPressed == true {
label1.text = textField1.text
} else {
textField1.text = ""
label1.text = ""
}
}
}