Swift

Swift on OS X. How to handle global mouse events?

You are correct about using addGlobalMonitorForEventsMatchingMask:handler: A simple example might look something like this: AppDelegate.swift

class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet weak var window: NSWindow!
    @IBOutlet var textLabel : NSTextField!
    var eventHandler : GlobalEventMonitor?
    var gecount : Int = 0

    func applicationDidFinishLaunching(aNotification: NSNotification) {

        eventHandler = GlobalEventMonitor(mask: .LeftMouseDownMask, handler: { (mouseEvent: NSEvent?) in
        self.gecount += 1
        self.textLabel.stringValue = "global event monitor: \(self.gecount)"
    })
    eventHandler?.start()
  }
}

class AppDelegate: NSObject, NSApplicationDelegate {

@IBOutlet weak var window: NSWindow!

@IBOutlet var textLabel : NSTextField!

var eventHandler : GlobalEventMonitor?

var gecount : Int = 0

func applicationDidFinishLaunching(aNotification: NSNotification) {

eventHandler = GlobalEventMonitor(mask: .LeftMouseDownMask, handler: { (mouseEvent: NSEvent?) in

self.gecount += 1

self.textLabel.stringValue = "global event monitor: \(self.gecount)"

})

eventHandler?.start()

}

GlobalEventMonitor.swift

public class GlobalEventMonitor {

    private var monitor: AnyObject?
    private let mask: NSEventMask
    private let handler: NSEvent? -> ()

    public init(mask: NSEventMask, handler: NSEvent? -> ()) {
        self.mask = mask
        self.handler = handler
    }

    deinit {
        stop()
    }

    public func start() {
        monitor = NSEvent.addGlobalMonitorForEventsMatchingMask(mask, handler: handler)
    }

    public func stop() {
        if monitor != nil {
            NSEvent.removeMonitor(monitor!)
            monitor = nil
        }
    }
}

public class GlobalEventMonitor {

private var monitor: AnyObject?

private let mask: NSEventMask

private let handler: NSEvent? -> ()

public init(mask: NSEventMask, handler: NSEvent? -> ()) {

self.mask = mask

self.handler = handler

}

deinit {

stop()

}

public func start() {

monitor = NSEvent.addGlobalMonitorForEventsMatchingMask(mask, handler: handler)

}

public func stop() {

if monitor != nil {

NSEvent.removeMonitor(monitor!)

monitor = nil

}

shubham sharma April 17, 2019 Read More

Drag and Drop using swift 4 on mac OS

class DropView: NSView {
    
    var filePath: String?
    let expectedExt = ["jpg", "png", "jpeg"]  //file extensions allowed for Drag&Drop (example: "jpg","png","docx", etc..)
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        
        self.wantsLayer = true
        self.layer?.backgroundColor = NSColor.gray.cgColor
        
        registerForDraggedTypes([NSPasteboard.PasteboardType.URL, NSPasteboard.PasteboardType.fileURL])
    }
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        // Drawing code here.
    }
    
    override func draggingEntered(_ sender: NSDraggingInfo) -> NSDragOperation {
        if checkExtension(sender) == true {
            self.layer?.backgroundColor = NSColor.blue.cgColor
            return .copy
        } else {
            return NSDragOperation()
        }
    }
    
    fileprivate func checkExtension(_ drag: NSDraggingInfo) -> Bool {
        guard let board = drag.draggingPasteboard.propertyList(forType: NSPasteboard.PasteboardType(rawValue: "NSFilenamesPboardType")) as? NSArray,
            let path = board[0] as? String
            else { return false }
        
        let suffix = URL(fileURLWithPath: path).pathExtension
        for ext in self.expectedExt {
            if ext.lowercased() == suffix {
                return true
            }
        }
        return false
    }
    
    override func draggingExited(_ sender: NSDraggingInfo?) {
        self.layer?.backgroundColor = NSColor.gray.cgColor
    }
    
    override func draggingEnded(_ sender: NSDraggingInfo) {
        self.layer?.backgroundColor = NSColor.gray.cgColor
    }
    
    override func performDragOperation(_ sender: NSDraggingInfo) -> Bool {
        guard let pasteboard = sender.draggingPasteboard.propertyList(forType: NSPasteboard.PasteboardType(rawValue: "NSFilenamesPboardType")) as? NSArray,
            let path = pasteboard[0] as? String
            else { return false }
        
        //GET YOUR FILE PATH !!!
        self.filePath = path
        Swift.print("FilePath: \(path)")
        
        return true
    }
}

class DropView: NSView {

var filePath: String?

let expectedExt = ["jpg", "png", "jpeg"] //file extensions allowed for Drag&Drop (example: "jpg","png","docx", etc..)

required init?(coder: NSCoder) {

super.init(coder: coder)

self.wantsLayer = true

self.layer?.backgroundColor = NSColor.gray.cgColor

registerForDraggedTypes([NSPasteboard.PasteboardType.URL, NSPasteboard.PasteboardType.fileURL])

}

override func draw(_ dirtyRect: NSRect) {

super.draw(dirtyRect)

// Drawing code here.

}

override func draggingEntered(_ sender: NSDraggingInfo) -> NSDragOperation {

if checkExtension(sender) == true {

self.layer?.backgroundColor = NSColor.blue.cgColor

return .copy

} else {

return NSDragOperation()

}

fileprivate func checkExtension(_ drag: NSDraggingInfo) -> Bool {

guard let board = drag.draggingPasteboard.propertyList(forType: NSPasteboard.PasteboardType(rawValue: "NSFilenamesPboardType")) as? NSArray,

let path = board[0] as? String

else { return false }

let suffix = URL(fileURLWithPath: path).pathExtension

for ext in self.expectedExt {

if ext.lowercased() == suffix {

return true

}

return false

}

override func draggingExited(_ sender: NSDraggingInfo?) {

self.layer?.backgroundColor = NSColor.gray.cgColor

}

override func draggingEnded(_ sender: NSDraggingInfo) {

self.layer?.backgroundColor = NSColor.gray.cgColor

}

override func performDragOperation(_ sender: NSDraggingInfo) -> Bool {

guard let pasteboard = sender.draggingPasteboard.propertyList(forType: NSPasteboard.PasteboardType(rawValue: "NSFilenamesPboardType")) as? NSArray,

let path = pasteboard[0] as? String

else { return false }

//GET YOUR FILE PATH !!!

self.filePath = path

Swift.print("FilePath: \(path)")

return true

}

shubham sharma April 16, 2019 Read More

Track mouse movement Mac

class ViewController: NSViewController {

    @IBOutlet weak var xview: NSView!

    override func viewDidLoad() {
        super.viewDidLoad()
        xview.wantsLayer = true
    }

    //1.
    var isPresentingSlideshow = false
    @IBAction func toggle(_ sender: Any) {

        if(isPresentingSlideshow) {
            isPresentingSlideshow = false
            xview.layer?.backgroundColor = NSColor.green.cgColor
            teardownTracking()
        }
        else {
            isPresentingSlideshow = true
            xview.layer?.backgroundColor = NSColor.red.cgColor
            setupTracking()
        }
    }

    //2.
    var trackingArea:NSTrackingArea?
    func setupTracking() {
        let area = NSTrackingArea(rect: xview.bounds, options: [.activeAlways,.mouseEnteredAndExited,.mouseMoved,.inVisibleRect]  , owner: self, userInfo: nil)
        xview.addTrackingArea(area)
        trackingArea = area
    }

    //3.
    func teardownTracking() {
        if let trackingArea = trackingArea {
            xview.removeTrackingArea(trackingArea)
            self.trackingArea = nil
            NSCursor.setHiddenUntilMouseMoves(false)
        }
    }

    //4.
    var cursorHideState = false
    override func mouseMoved(with event: NSEvent) {
        super.mouseMoved(with: event)

        if !cursorHideState {
            cursorHideState = true
            //5.
            DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {
                [weak self] in
                if let _ = self?.trackingArea {
                    NSCursor.setHiddenUntilMouseMoves(true)
                    self?.cursorHideState = false
                }
            }
        }
    }

}

class ViewController: NSViewController {

@IBOutlet weak var xview: NSView!

override func viewDidLoad() {

super.viewDidLoad()

xview.wantsLayer = true

}

//1.

var isPresentingSlideshow = false

@IBAction func toggle(_ sender: Any) {

if(isPresentingSlideshow) {

isPresentingSlideshow = false

xview.layer?.backgroundColor = NSColor.green.cgColor

teardownTracking()

}

else {

isPresentingSlideshow = true

xview.layer?.backgroundColor = NSColor.red.cgColor

setupTracking()

}

//2.

var trackingArea:NSTrackingArea?

func setupTracking() {

let area = NSTrackingArea(rect: xview.bounds, options: [.activeAlways,.mouseEnteredAndExited,.mouseMoved,.inVisibleRect] , owner: self, userInfo: nil)

xview.addTrackingArea(area)

trackingArea = area

}

//3.

func teardownTracking() {

if let trackingArea = trackingArea {

xview.removeTrackingArea(trackingArea)

self.trackingArea = nil

NSCursor.setHiddenUntilMouseMoves(false)

}

//4.

var cursorHideState = false

override func mouseMoved(with event: NSEvent) {

super.mouseMoved(with: event)

if !cursorHideState {

cursorHideState = true

//5.

DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {

[weak self] in

if let _ = self?.trackingArea {

NSCursor.setHiddenUntilMouseMoves(true)

self?.cursorHideState = false

}

What going on here is. Simple toggle action to flip between playing/not-playing state and reflect that in the color state. Adds a NSTrackingArea to the view. The owner is this view controller so it will receive the mouseMoved: event. The option .mouseMoved is required to set this up. Removes the tracking area from the view when the slide show […]

shubham sharma April 8, 2019 Read More

Swift Multi-Threading

1- The Main Queue 2- The Global Queue: 3- Custom Queues:

DispatchQueue.main.async {
   ...
}

DispatchQueue.main.async {

...

}

DispatchQueue.global(qos: .background).async {
...
}

DispatchQueue.global(qos: .background).async {

...

}

let concurrentQueue = DispatchQueue(label: "queuename", attributes: .concurrent)
concurrentQueue.sync {
...
}  <span style="font-family: inherit; font-size: inherit;"> </span>

let concurrentQueue = DispatchQueue(label: "queuename", attributes: .concurrent)

concurrentQueue.sync {

...

} <span style="font-family: inherit; font-size: inherit;"> </span>

highest priority 1- userInteractive : Work is virtually instantaneous. Similar to main thread. 2- userInitiated : Work is nearly instantaneous, such as a few seconds or less. 3- default: don’t use it usually , the type will be inferred by the system 4- utility: Work takes a few seconds to a few […]

shubham sharma April 6, 2019 Read More

Difference between Structure vs class in swift

Here’s an example with a class. Note how when the name is changed, the instance referenced by both variables is updated. Bob is now Sue, everywhere that Bob was ever referenced.

class SomeClass {
    var name: String
    init(name: String) {
        self.name = name
    }
}

var aClass = SomeClass(name: "Bob")
var bClass = aClass // aClass and bClass now reference the same instance!
bClass.name = "Sue"

println(aClass.name) // "Sue"
println(bClass.name) // "Sue"

class SomeClass {

var name: String

init(name: String) {

self.name = name

}

var aClass = SomeClass(name: "Bob")

var bClass = aClass // aClass and bClass now reference the same instance!

bClass.name = "Sue"

println(aClass.name) // "Sue"

println(bClass.name) // "Sue"

And now with a struct we see that the values are copied and each variable keeps it’s own set of values. When we set the name to Sue, the Bob struct in aStruct does not […]

shubham sharma March 26, 2019 Read More

Swift: Dictionary And Json operations

If you need to convert JSON string into a dictionary or a dictionary into JSON String

import Foundation

class JsonOperation {
    public static func toJsonStringFrom(dictionary: [String:Any]) -> NSString? {
        let jsonData = try! JSONSerialization.data(withJSONObject: dictionary)
        let jsonString = NSString(data: jsonData, encoding: String.Encoding.utf8.rawValue)
        return jsonString
    }
    public static func toJsonStringFrom(array: [String]) -> NSString? {
        let jsonData = try! JSONSerialization.data(withJSONObject: array)
        let jsonString = NSString(data: jsonData, encoding: String.Encoding.utf8.rawValue)
        return jsonString
    }
    static func toDictionaryFrom(string: String) -> [String: Any]? {
        if let data = string.data(using: .utf8) {
            do {
                return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
            } catch {
                print(error.localizedDescription)
            }
        }
        return nil
    }
}

import Foundation

class JsonOperation {

public static func toJsonStringFrom(dictionary: [String:Any]) -> NSString? {

let jsonData = try! JSONSerialization.data(withJSONObject: dictionary)

let jsonString = NSString(data: jsonData, encoding: String.Encoding.utf8.rawValue)

return jsonString

}

public static func toJsonStringFrom(array: [String]) -> NSString? {

let jsonData = try! JSONSerialization.data(withJSONObject: array)

let jsonString = NSString(data: jsonData, encoding: String.Encoding.utf8.rawValue)

return jsonString

}

static func toDictionaryFrom(string: String) -> [String: Any]? {

if let data = string.data(using: .utf8) {

do {

return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]

} catch {

print(error.localizedDescription)

}

return nil

}

shubham sharma March 18, 2019 Read More

iOS Open Document picker in

import UIKit

class DocumentPickerViewController: UIViewController {

    @IBOutlet weak var fileDetails: UITextView!
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }
    
    @IBAction func openDocument(_ sender: Any) {
        selectDocument()
    }
    
}
extension DocumentPickerViewController:  UIDocumentPickerDelegate{
    fileprivate func selectDocument(){
        
        //    kUTTypePDF, kUTTypeText, kUTTypeRTF, kUTTypeSpreadsheet
        
        
        //    String(kUTTypePDF),String(kUTTypeRTFD),String(kUTTypeText),String(kUTTypeSpreadsheet)
        
        
        //    let test = UIDocumentPickerViewController
        
        let importMenu = UIDocumentPickerViewController(documentTypes: ["public.item"], in: .import)
        importMenu.delegate = self
        importMenu.modalPresentationStyle = .formSheet
        self.present(importMenu, animated: true, completion: nil)
    }
    public func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {
        let fileUrl = url as URL
        print("import result : \(fileUrl)")
        
        let theFileName = (fileUrl.absoluteString as NSString).lastPathComponent
        
        print(theFileName)
        fileDetails.text = fileUrl.absoluteString
        fileDetails.insertText("\n\n")
        
        fileDetails.insertText(theFileName)
        
        // Create a FileManager instance
        
        
    }
    
    
    public func documentMenu(_ documentMenu:UIDocumentPickerViewController, didPickDocumentPicker documentPicker: UIDocumentPickerViewController) {
        documentPicker.delegate = self
        present(documentPicker, animated: true, completion: nil)
    }
    
    
    func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
        print("view was cancelled")
        dismiss(animated: true, completion: nil)
    }
    
}

import UIKit

class DocumentPickerViewController: UIViewController {

@IBOutlet weak var fileDetails: UITextView!

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view.

}

@IBAction func openDocument(_ sender: Any) {

selectDocument()

}

extension DocumentPickerViewController: UIDocumentPickerDelegate{

fileprivate func selectDocument(){

// kUTTypePDF, kUTTypeText, kUTTypeRTF, kUTTypeSpreadsheet

// String(kUTTypePDF),String(kUTTypeRTFD),String(kUTTypeText),String(kUTTypeSpreadsheet)

// let test = UIDocumentPickerViewController

let importMenu = UIDocumentPickerViewController(documentTypes: ["public.item"], in: .import)

importMenu.delegate = self

importMenu.modalPresentationStyle = .formSheet

self.present(importMenu, animated: true, completion: nil)

}

public func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {

let fileUrl = url as URL

print("import result : \(fileUrl)")

let theFileName = (fileUrl.absoluteString as NSString).lastPathComponent

print(theFileName)

fileDetails.text = fileUrl.absoluteString

fileDetails.insertText("\n\n")

fileDetails.insertText(theFileName)

// Create a FileManager instance

}

public func documentMenu(_ documentMenu:UIDocumentPickerViewController, didPickDocumentPicker documentPicker: UIDocumentPickerViewController) {

documentPicker.delegate = self

present(documentPicker, animated: true, completion: nil)

}

func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {

print("view was cancelled")

dismiss(animated: true, completion: nil)

}

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shubham sharma February 13, 2019 Read More

iOS Open camera and image picker in

import UIKit

class ImagePickerViewController: UIViewController {
    @IBOutlet weak var imageView: UIImageView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    @IBAction func changeImage(_ sender: Any) {
        let alertController = UIAlertController(title: "Choose Profile Picture" , message: "", preferredStyle: .actionSheet)
        
        let cameraButton = UIAlertAction(title: "Camera" , style: .default, handler: { (action) -> Void in
            self.openCamera()
        })
        
        let  galleryButton = UIAlertAction(title: "Gallery" , style: .default, handler: { (action) -> Void in
            self.openPhotoLibrary()
        })
        
        let cancelButton = UIAlertAction(title: "Cancel" , style: .cancel, handler: { (action) -> Void in
        })
        
        alertController.addAction(cameraButton)
        alertController.addAction(galleryButton)
        alertController.addAction(cancelButton)
        
        self.present(alertController, animated: true, completion: nil)
    }
    
}

extension ImagePickerViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    fileprivate func openCamera() {
        let myPickerController = UIImagePickerController()
        myPickerController.delegate = self;
        myPickerController.sourceType = UIImagePickerController.SourceType.camera
        self.present(myPickerController, animated: true, completion: nil)
    }
    
    fileprivate func openPhotoLibrary() {
        let myPickerController = UIImagePickerController()
        myPickerController.delegate = self;
        myPickerController.sourceType = UIImagePickerController.SourceType.photoLibrary
        self.present(myPickerController, animated: true, completion: nil)
    }
    
    
    // MARK: UIImagePickerControllerDelegate
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        // Dismiss the picker if the user canceled.
        dismiss(animated: true, completion: nil)
    }
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        // The info dictionary contains multiple representations of the image, and this uses the original. 
        let selectedImage : UIImage = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
        
        
        // Set image on ImageView
        imageView.image = selectedImage
        
        // Dismiss the picker.
        dismiss(animated: true, completion: nil)
    }
}


//Add these keys into Info.plist
//make sure use valid description otherwise apple will reject your app

//<key>NSCameraUsageDescription</key>
//<string>Use camera to update your profile Pic</string>
//<key>NSPhotoLibraryUsageDescription</key>
//<string>lUse ibrary to update your profile Pic</string>

import UIKit

class ImagePickerViewController: UIViewController {

@IBOutlet weak var imageView: UIImageView!

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view.

}

@IBAction func changeImage(_ sender: Any) {

let alertController = UIAlertController(title: "Choose Profile Picture" , message: "", preferredStyle: .actionSheet)

let cameraButton = UIAlertAction(title: "Camera" , style: .default, handler: { (action) -> Void in

self.openCamera()

})

let galleryButton = UIAlertAction(title: "Gallery" , style: .default, handler: { (action) -> Void in

self.openPhotoLibrary()

})

let cancelButton = UIAlertAction(title: "Cancel" , style: .cancel, handler: { (action) -> Void in

})

alertController.addAction(cameraButton)

alertController.addAction(galleryButton)

alertController.addAction(cancelButton)

self.present(alertController, animated: true, completion: nil)

}

extension ImagePickerViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {

fileprivate func openCamera() {

let myPickerController = UIImagePickerController()

myPickerController.delegate = self;

myPickerController.sourceType = UIImagePickerController.SourceType.camera

self.present(myPickerController, animated: true, completion: nil)

}

fileprivate func openPhotoLibrary() {

let myPickerController = UIImagePickerController()

myPickerController.delegate = self;

myPickerController.sourceType = UIImagePickerController.SourceType.photoLibrary

self.present(myPickerController, animated: true, completion: nil)

}

// MARK: UIImagePickerControllerDelegate

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {

// Dismiss the picker if the user canceled.

dismiss(animated: true, completion: nil)

}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

// The info dictionary contains multiple representations of the image, and this uses the original.

let selectedImage : UIImage = info[UIImagePickerController.InfoKey.originalImage] as! UIImage

// Set image on ImageView

imageView.image = selectedImage

// Dismiss the picker.

dismiss(animated: true, completion: nil)

}

//Add these keys into Info.plist

//make sure use valid description otherwise apple will reject your app

//<key>NSCameraUsageDescription</key>

//<string>Use camera to update your profile Pic</string>

//<key>NSPhotoLibraryUsageDescription</key>

//<string>lUse ibrary to update your profile Pic</string>

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shubham sharma February 13, 2019 Read More

iOS Add loader

add loader in ios

//create an extension for UIViewController which
//contains getActivityIndicator method
extension UIViewController {
func getActivityIndicator(_ title: String) -> UIView {
var activityIndicator = UIActivityIndicatorView()
var strLabel = UILabel()
let effectView = UIVisualEffectView(effect: UIBlurEffect(style: .dark))
let mainUi = UIView()

strLabel.removeFromSuperview()
activityIndicator.removeFromSuperview()
effectView.removeFromSuperview()

strLabel = UILabel(frame: CGRect(x: 50, y: 0, width: 160, height: 46))
strLabel.text = title
strLabel.font = .systemFont(ofSize: 14, weight: .medium)
strLabel.textColor = UIColor(white: 0.9, alpha: 0.7)

effectView.frame = CGRect(x: view.frame.midX - 80, y: view.frame.midY - strLabel.frame.height/2 , width: 160, height: 46)
effectView.layer.cornerRadius = 3
effectView.layer.masksToBounds = true

activityIndicator = UIActivityIndicatorView(style: .white)
activityIndicator.frame = CGRect(x: 0, y: 0, width: 46, height: 46)
activityIndicator.startAnimating()

effectView.contentView.addSubview(activityIndicator)
effectView.contentView.addSubview(strLabel)

mainUi.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height)
mainUi.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.4)

mainUi.addSubview(effectView)
return mainUi
}
}

// then in your viewcontroler create a field
fileprivate var viewloader:UIView?

//initlize view
viewloader = getActivityIndicator("Loading...")
// add view when you need
view.addSubview(viewloader!)

//remove view when you don't need
self.viewloader?.removeFromSuperview()

//create an extension for UIViewController which

//contains getActivityIndicator method

extension UIViewController {

func getActivityIndicator(_ title: String) -> UIView {

var activityIndicator = UIActivityIndicatorView()

var strLabel = UILabel()

let effectView = UIVisualEffectView(effect: UIBlurEffect(style: .dark))

let mainUi = UIView()

strLabel.removeFromSuperview()

activityIndicator.removeFromSuperview()

effectView.removeFromSuperview()

strLabel = UILabel(frame: CGRect(x: 50, y: 0, width: 160, height: 46))

strLabel.text = title

strLabel.font = .systemFont(ofSize: 14, weight: .medium)

strLabel.textColor = UIColor(white: 0.9, alpha: 0.7)

effectView.frame = CGRect(x: view.frame.midX - 80, y: view.frame.midY - strLabel.frame.height/2 , width: 160, height: 46)

effectView.layer.cornerRadius = 3

effectView.layer.masksToBounds = true

activityIndicator = UIActivityIndicatorView(style: .white)

activityIndicator.frame = CGRect(x: 0, y: 0, width: 46, height: 46)

activityIndicator.startAnimating()

effectView.contentView.addSubview(activityIndicator)

effectView.contentView.addSubview(strLabel)

mainUi.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height)

mainUi.backgroundColor = UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.4)

mainUi.addSubview(effectView)

return mainUi

}

// then in your viewcontroler create a field

fileprivate var viewloader:UIView?

//initlize view

viewloader = getActivityIndicator("Loading...")

// add view when you need

view.addSubview(viewloader!)

//remove view when you don't need

self.viewloader?.removeFromSuperview()

shubham sharma February 13, 2019 Read More

iOS Swift SSView

Change gradient background Rounded corners Shadow

import UIKit

@IBDesignable
class SSView: UIView {
    
    @IBInspectable var GradientFirstColor :UIColor = UIColor.clear {
        didSet{
            updateView()
        }
    }
    @IBInspectable var GradientSecondColor :UIColor = UIColor.clear {
        didSet{
            updateView()
        }
    }
    
    @IBInspectable var useShadow:Bool = false {
        didSet{
            if(useShadow){
                dropShadow(scale: false)
            }
        }
    }
    @IBInspectable var shadowColor :UIColor = UIColor.blue {
        didSet{
            if(useShadow){
                dropShadow(scale: false)
            }
        }
    }
    @IBInspectable var shadowRadius:CGFloat = 0 {
        didSet{
            if(useShadow){
                dropShadow(scale: false)
            }
        }
    }
    @IBInspectable var radius:Bool = false {
        didSet{
            updateRadius()
        }
    }
    @IBInspectable var  ShadowX:Int = 1 {
        didSet{
            updateRadius()
        }
    }
    @IBInspectable var  ShadowY:Int = 1 {
        didSet{
            updateRadius()
        }
    }
    
    
    @IBInspectable var radiusAmt:CGFloat = 0 {
        didSet{
            updateRadius()
        }
    }
    
    
    override class var layerClass: Swift.AnyClass{
        get {
            return CAGradientLayer.self
        }
    }
    func updateView(){
        let layer = self.layer as! CAGradientLayer
        layer.colors = [GradientFirstColor.cgColor, GradientSecondColor.cgColor]
        
    }
    
    // OUTPUT 1
    func dropShadow(scale: Bool = true) {
        self.layer.masksToBounds = false
        self.layer.shadowColor = shadowColor.cgColor
        self.layer.shadowOpacity = 0.3
        self.layer.shadowOffset = CGSize(width: ShadowX, height: ShadowY)
        self.layer.shadowRadius = shadowRadius
        
        //        self.layer.shadowPath = UIBezierPath(rect: self.bounds).cgPath
        //        self.layer.shouldRasterize = true
        //        self.layer.rasterizationScale = scale ? UIScreen.main.scale : 1
        
    }
    
    func updateRadius(){
        if(radius){
            self.layer.cornerRadius = radiusAmt;
            self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.layer.cornerRadius).cgPath
            //            self.layer.masksToBounds = true;
        }
    }
    
}

import UIKit

@IBDesignable

class SSView: UIView {

@IBInspectable var GradientFirstColor :UIColor = UIColor.clear {

didSet{

updateView()

}

@IBInspectable var GradientSecondColor :UIColor = UIColor.clear {

didSet{

updateView()

}

@IBInspectable var useShadow:Bool = false {

didSet{

if(useShadow){

dropShadow(scale: false)

}

@IBInspectable var shadowColor :UIColor = UIColor.blue {

didSet{

if(useShadow){

dropShadow(scale: false)

}

@IBInspectable var shadowRadius:CGFloat = 0 {

didSet{

if(useShadow){

dropShadow(scale: false)

}

@IBInspectable var radius:Bool = false {

didSet{

updateRadius()

}

@IBInspectable var ShadowX:Int = 1 {

didSet{

updateRadius()

}

@IBInspectable var ShadowY:Int = 1 {

didSet{

updateRadius()

}

@IBInspectable var radiusAmt:CGFloat = 0 {

didSet{

updateRadius()

}

override class var layerClass: Swift.AnyClass{

get {

return CAGradientLayer.self

}

func updateView(){

let layer = self.layer as! CAGradientLayer

layer.colors = [GradientFirstColor.cgColor, GradientSecondColor.cgColor]

}

// OUTPUT 1

func dropShadow(scale: Bool = true) {

self.layer.masksToBounds = false

self.layer.shadowColor = shadowColor.cgColor

self.layer.shadowOpacity = 0.3

self.layer.shadowOffset = CGSize(width: ShadowX, height: ShadowY)

self.layer.shadowRadius = shadowRadius

// self.layer.shadowPath = UIBezierPath(rect: self.bounds).cgPath

// self.layer.shouldRasterize = true

// self.layer.rasterizationScale = scale ? UIScreen.main.scale : 1

}

func updateRadius(){

if(radius){

self.layer.cornerRadius = radiusAmt;

self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.layer.cornerRadius).cgPath

// self.layer.masksToBounds = true;

}

shubham sharma November 20, 2018 Read More

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