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UIImageJPEGRepresentation(image, compressionRatio)

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func UIImageToDataJPEG2(image: UIImage, compressionRatio: CGFloat) -> Data? {
    return autoreleasepool(invoking: { () -> Data? in
        return UIImageJPEGRepresentation(image, compressionRatio)
    })
}

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extension ConfirmationViewController: UIGestureRecognizerDelegate {
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
        return touch.view == gestureRecognizer.view
    }
    
    func handleTapOffModal(_ sender: UITapGestureRecognizer) {
        dismiss(animated: true, completion: nil)
    }
}

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internal class ConfirmationViewController: UIViewController {            
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTapOffModal(_:)))
        tap.delegate = self
        view.addGestureRecognizer(tap)
        view.isUserInteractionEnabled = true
                
    }    

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import UIKit

internal class ConfirmationViewController: UIViewController {            
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTapOffModal(_:)))
        tap.delegate = self
        view.addGestureRecognizer(tap)

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struct FileHelpers {
    @discardableResult static func addSkipBackupAttribute(url: URL) throws -> Bool {
        var fileUrl = url
        do {
            if FileManager.default.fileExists(atPath: fileUrl.path) {
                var resourceValues = URLResourceValues()
                resourceValues.isExcludedFromBackup = true
                try fileUrl.setResourceValues(resourceValues)
            }
            return true

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final class discardableThumbnail: NSDiscardableContent {
    var thumbnail: UIImage!
    var accessCounter: Int = 0
    
    init(image: UIImage) {
        thumbnail = image
    }
    
    func beginContentAccess() -> Bool {
        if !(self.thumbnail != nil) {

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/// Example adding it the first time
let recognizer = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))
view.addGestureRecognizer(recognizer)

/// Test if gesture already added, if added return else add the recognizer
guard containsGestureRecognizer(recognizers: view.gestureRecognizers, find: recognizer) == false else { return }
/// Add the recognizer
view.addGestureRecognizer(recognizer)

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func containsGestureRecognizer(recognizers: [UIGestureRecognizer]?, find: UIGestureRecognizer) -> Bool {
   if let recognizers = recognizers {
       for gr in recognizers {
           if gr == find {
               return true
           }
       }
   }
   return false
}

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if let pdf = unlock(data: pdfData, password: "Hello World") {
	print("You now have an unlocked CGPDFDocument")
    
    print("Create a copy of the unlocked CGPDFDocument")
    let pdfWithoutPassword = copyPDFtoData(pdf: pdf)    
    
    print("You how have a pdf without password information")
    
}