In my app delegate I make my window translucent with the following code:
func applicationDidFinishLaunching(_ aNotification: Notification) {
let visualEffect = NSVisualEffectView()
visualEffect.translatesAutoresizingMaskIntoConstraints = false
visualEffect.material = .dark
visualEffect.state = .active
visualEffect.wantsLayer = true
visualEffect.layer?.cornerRadius = 16.0
NSApplication.shared.mainWindow?.titleVisibility = .hidden
NSApplication.shared.mainWindow?.styleMask.remove(.titled)
NSApplication.shared.mainWindow?.backgroundColor = .clear
NSApplication.shared.mainWindow?.isMovableByWindowBackground = true
NSApplication.shared.mainWindow?.contentView?.addSubview(visualEffect)
guard let constraints = NSApplication.shared.mainWindow?.contentView else {
return
}
visualEffect.leadingAnchor.constraint(equalTo: constraints.leadingAnchor).isActive = true
visualEffect.trailingAnchor.constraint(equalTo: constraints.trailingAnchor).isActive = true
visualEffect.topAnchor.constraint(equalTo: constraints.topAnchor).isActive = true
visualEffect.bottomAnchor.constraint(equalTo: constraints.bottomAnchor).isActive = true
}
The problem with this is that every element in the storyboard is no longer visible. How can I fix this? Thanks
You need to add all your UI to the NSVisualEffectView as subviews or move the NSVisualEffectView to the back of the view hierarchy:
NSApplication.shared.mainWindow?.contentView?.addSubview(visualEffect, positioned: .below, relativeTo: nil)
Update:
I created a new macOS project in Xcode and added a label on the view. Then I pasted your code and the only thing I changed was the line of code above. It works.
Related
I am trying to add alpha to the background view when tapped on a button. So far achieved adding blur but alpha not so much.
How can I add alpha to the background so that when the bottom sheet appears background will be darker and disabled.
let maxDimmedAlpha: CGFloat = 0.2
lazy var dimmedView: UIView = {
let view = UIView()
view.backgroundColor = .black
view.alpha = maxDimmedAlpha
return view
}()
#objc func shareBtnClick() {
dimmedView.frame = self.parentVC.view.bounds
dimmedView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.parentVC.view.addSubview(dimmedView)
if self.parentVC.navigationController != nil {
if self.parentVC.navigationController?.viewControllers.count == 1 {
showBottomSheet()
} else {
NotificationCenter.default.post(name: NSNotification.Name("ShowBottomSheet"), object: nil, userInfo: ["itemId": modalSheet(), "delegate": self])
}
} else {
showBottomSheet()
}
}
func showBottomSheet() {
let modalSheet = MainBottomSheet()
modalSheet.data = self.modalSheet()
modalSheet.delegate = self
modalSheet.modalPresentationStyle = .overCurrentContext
self.parentVC.present(modalSheet, animated: true)
}
I was able to produce the dimmed effect using this code in XCode, I'm not sure why it won't work in your project but there is an easy way to debug this.
I suggest using Debug View Hierarchy, one of XCode's best tools in my opinion. This allows you to separate every single layer of the user interface. This way, you can see if your dimmedView is actually being added to the parent view and that its frame is matching the parent view's bounds.
Keep in mind if your background is dark, you won't see this dimmedView because its backgroundColor is set to UIColor.black.
Debug View Hierarchy button
(Swift, macOS, storyboard)
I have an NSView in a transparent window
I have this in the viewDidLoad. To make the window transparent and the NSView blue:
DispatchQueue.main.asyncAfter(deadline: .now() + 0.2){
self.view.window?.isOpaque = false
self.view.window?.backgroundColor = NSColor.clear
}
view1.wantsLayer = true
view1.layer?.backgroundColor = NSColor.green.cgColor
I want to change the width with code when I click a button.
If it has constraints:
#IBAction func button1(_ sender: NSButton) {
view1Width.constant = 74
}
I tried without constraints and different ways to change the width. They all give the same results:
view1.frame = NSRect(x:50, y:120, width:74, height:100)
But there is still a border and a shadow where the old shape was. Why does it happen and how to solve it?
It only happens in specific circumstances:
If the window is transparent (and macOS)
I change the width and do not change the position y
The window must be active. If it is not (If I click to anywhere else) it looks as it should: the shadow around the changed NSView green.
(I have simplified the case to try to find a solution. I have created a new document and there is only this code and I am sure there is no other element)
Since the window is transparent you need to invalidate the shadows.
Apple states about invalidateShadow()
Invalidates the window shadow so that it is recomputed based on the current window shape.
Complete Self-Contained Test Program
It sets up the UI pogrammatically instead of using a storyboard. Other than that, the code is very close to your example.
Note the line:
view.window?.invalidateShadow()
in the onChange method.
import Cocoa
class ViewController: NSViewController {
private let view1 = NSView()
private let changeButton = NSButton()
private var view1Width: NSLayoutConstraint?
override func viewDidLoad() {
super.viewDidLoad()
setupUI()
DispatchQueue.main.asyncAfter(deadline: .now() + 0.2){
self.view.window?.isOpaque = false
self.view.window?.backgroundColor = NSColor.clear
}
view1.wantsLayer = true
view1.layer?.backgroundColor = NSColor.green.cgColor
}
#objc private func onChange() {
view1Width?.constant += 32
view.window?.invalidateShadow()
}
private func setupUI() {
changeButton.title = "change"
changeButton.bezelStyle = .rounded
changeButton.setButtonType(.momentaryPushIn)
changeButton.target = self
changeButton.action = #selector(onChange)
self.view.addSubview(view1)
self.view.addSubview(changeButton)
self.view1.translatesAutoresizingMaskIntoConstraints = false
self.changeButton.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
view1.centerXAnchor.constraint(equalTo: view.centerXAnchor),
view1.centerYAnchor.constraint(equalTo: view.centerYAnchor),
view1.heightAnchor.constraint(equalToConstant: 128),
changeButton.topAnchor.constraint(equalTo: view1.bottomAnchor, constant:16),
changeButton.centerXAnchor.constraint(equalTo: view1.centerXAnchor)
])
view1Width = view1.widthAnchor.constraint(equalToConstant: 128)
view1Width?.isActive = true
}
}
Result
The desired result with an update of the shadows is accomplished:
Currently I am using a PDFView in my swift application, however when I instantiate the view controller that uses the PDFView, it always opens the pdf slightly scrolled down. For example:
The first image is how it opens, and the second image is the way I would like it to open. I can simply scroll up to have it look like the image on the right, however I wanted to know if there was any way of automatically doing it.
Here is the code I am currently using:
override func viewDidLoad() {
let pdfView = PDFView()
pdfView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(pdfView)
pdfView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
pdfView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
pdfView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
pdfView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
pdfView.autoScales = true
pdfView.displayMode = .singlePageContinuous
pdfView.displayDirection = .vertical
guard let url = item?.url else {
return
}
guard let path = Bundle.main.url(forResource: url, withExtension: "pdf") else { return }
if let document = PDFDocument(url: path) {
pdfView.document = document
}
}
I have the same issue and I solve it adding the following line:
override func viewDidLoad() {
super.viewDidLoad()
// this line
self.edgesForExtendedLayout = []
let pdfView = PDFView()()
...
}
That line stops your view going under the navigation bar
I had the same issue with my PDF Document.
It looks like the document within the PDF Viewer simply ignored the top-anchor of the PDF Viewer and ended up favouring the top of the device and thus you have the top part of the document under the navigation bar.
The way I solved it was to add a UIView to the view-controller and anchor it all around to the 'safeAreaLayoutGuide' of the view-controller, then add the PDFView to that UIView and pin it to all the edges. Seems like a long winded approach, but it works.
The code below shows the basic implementation.
lazy var pdfView: PDFView = {
let pdf = PDFView(frame: self.view.bounds)
pdf.displayMode = .singlePageContinuous
pdf.displayDirection = .vertical
pdf.scaleFactor = pdf.scaleFactorForSizeToFit
pdf.autoScales = true
pdf.translatesAutoresizingMaskIntoConstraints = false
pdf.setValue(true, forKey: "forcesTopAlignment")
return pdf
}()
let pdfContentView = UIView()
view.addSubview(pdfContentView)
pdfContentView.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([pdfContentView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
pdfContentView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor),
pdfContentView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),
pdfContentView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor)])
pdfContentView.addSubview(pdfView)
NSLayoutConstraint.activate([pdfView.topAnchor.constraint(equalTo: pdfContentView.topAnchor),
pdfView.bottomAnchor.constraint(equalTo: pdfContentView.bottomAnchor),
pdfView.widthAnchor.constraint(equalTo: pdfContentView.widthAnchor),
pdfView.centerXAnchor.constraint(equalTo: pdfContentView.centerXAnchor)])
I have created a window with a vibrant background (kind of semi-transparent background).
override func viewWillAppear() {
super.viewWillAppear()
let visualEffect = NSVisualEffectView()
visualEffect.blendingMode = .behindWindow
visualEffect.state = .active
visualEffect.material = .light
view.window?.contentView = visualEffect
}
When I add that vibrant background, the text of the label disappears.
How to put a label and an NSView in a vibrant background?
(To test it I have created a new document with a label with no background and that text: label1 and only the code of the vibrant background I give here. When I add the vibrant code, the text of the label disappears)
// That is what I already had in my question:
let visualEffect = NSVisualEffectView()
visualEffect.blendingMode = NSVisualEffectView.BlendingMode.behindWindow
visualEffect.material = NSVisualEffectView.Material.light
// That is the key to solve the problem:
view.addSubview(visualEffect, positioned: .below, relativeTo: label1)
// Constraints. They are also necessary:
visualEffect.translatesAutoresizingMaskIntoConstraints = false
visualEffect.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
visualEffect.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
visualEffect.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
visualEffect.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
I am doing an app that does background job that can take some time
I want to show a loader in that time
I want a black screen with a simple loader in the front of it
and show it \ hide it,
when I do actions in the background
I want to do a simple half black square with loader circle
that also blocks presses to the screen
Like in this picture:
How can I achieve that and that ?
First create one UIView which you will put in front of your LogIn view. Then add UIActivityIndicatorView to the created UIView.
let loadingIndicatorView = UIView()
let activityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: .gray)
Now the loadingIndicatorView should have same frame size as your LogIN view. For color you can set your own color with alpha as you want to show LogIn content too. Initially keep it hidden and whenever you want to show it unhide it.
loadingIndicatorView.frame = view.frame
loadingIndicatorView.backgroundColor = .gray
loadingIndicatorView.isHidden = true
Now setup activityIndicatorView, it should be shown at centre,
activityIndicatorView.center = CGPoint(
x: UIScreen.main.bounds.size.width / 2,
y: UIScreen.main.bounds.size.height / 2
)
You can set some color to the indicator,
activityIndicatorView.color = .white
activityIndicatorView.hidesWhenStopped = true
Now add this activityIndicatorView to loadingIndicatorView and loadingIndicatorView to LogIn View.
loadingIndicatorView.addSubview(activityIndicatorView)
view.addSubview(loadingIndicatorView)
Lastly for showing do,
loadingIndicator.startAnimating()
loadingIndicatorView.isHidden = false
And for hiding,
loadingIndicator.stopAnimating()
loadingIndicatorView.isHidden = true
Updated Answer
Since the OP wanted an example code. Hence the updated answer. Hope everyone gets to learn something or the other out of it.
To start with, I created a subclass of UIView and named it PSOverlaySpinner and it looks something like below:
import UIKit
class PSOverlaySpinner: UIView {
//MARK: - Variables
private var isSpinning: Bool = false
private lazy var spinner : UIActivityIndicatorView = {
var spinner = UIActivityIndicatorView(style: UIActivityIndicatorView.Style.white)
spinner.translatesAutoresizingMaskIntoConstraints = false
spinner.hidesWhenStopped = true
return spinner
}()
// MARK: - View Lifecycle Functions
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
init() {
super.init(frame: CGRect.zero)
self.translatesAutoresizingMaskIntoConstraints = false
self.backgroundColor = UIColor.init(white: 0.0, alpha: 0.8)
self.isSpinning = false
self.isHidden = true
createSubviews()
}
deinit {
self.removeFromSuperview()
}
func createSubviews() -> Void {
self.addSubview(spinner)
setupAutoLayout()
}
// MARK: - Private Methods
private func setupAutoLayout() {
if #available(iOS 11.0, *) {
spinner.safeAreaLayoutGuide.centerXAnchor.constraint(equalTo: safeAreaLayoutGuide.centerXAnchor).isActive = true
spinner.safeAreaLayoutGuide.centerYAnchor.constraint(equalTo: safeAreaLayoutGuide.centerYAnchor).isActive = true
} else {
// Fallback on earlier versions
spinner.centerXAnchor.constraint(equalTo: centerXAnchor).isActive = true
spinner.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true
}
}
// MARK: - Public Methods
public func show() -> Void {
DispatchQueue.main.async {
if !self.spinner.isAnimating {
self.spinner.startAnimating()
}
self.isHidden = false
}
isSpinning = true
}
public func hide() -> Void {
DispatchQueue.main.async {
if self.spinner.isAnimating {
self.spinner.stopAnimating()
}
self.isHidden = true
}
isSpinning = false
}
}
Now move onto the ViewController that you want to add this overlay view to. Since I create my views programmatically, I will show how to do it the same way, but you can easily do it via storyboard or xibs.
Step 1 : Initialize
public lazy var spinnerView : PSOverlaySpinner = {
let loadingView : PSOverlaySpinner = PSOverlaySpinner()
return loadingView
}()
Step 2 : Add as a subview
self.view.addSubview(spinnerView)
Step 3 : Set constraints
spinnerView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
spinnerView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
spinnerView.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
spinnerView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
Step 4 : To show PSOverlaySpinner
spinnerView.show()
Step 5 : To hide PSOverlaySpinner
spinnerView.hide()
That is it!!
If you want you can go ahead and modify the PSOverlaySpinner as per your needs. For example, you might want to add a UILabel below the spinner indicating him of the type of action taking place and so on.
Before
After
Old Answer
If you wish to do it manually then create a UIView with the its frame matching self.view.bounds, with 0.5-0.7 alpha and black background color. Add UIActivityIndicator as its subview constrained to its center. For a spinner specific to the image you will have to use the open sourced spinners made available. A couple of them can be found here. Once done add this view as the topmost subview in self.view.
You need to import this library SVProgressHUD and then set few properties like as follows:
SVProgressHUD.setDefaultStyle(SVProgressHUDStyle.dark)
SVProgressHUD.setBackgroundColor(.clear)
SVProgressHUD.setForegroundColor(.white)
SVProgressHUD.setDefaultMaskType(.black)
SVProgressHUD.show()
//SVProgressHUD.show(withStatus: "Loading something, Loading something,Loading something ...")
This will produce same UI output as needed by you in OP. You can find a running sample at my repository (TestPreLoader)