J'essaie de créer une application de dessin qui se trouve au-dessus d'un UIImagePickerController
après la prise de vue. Les fonctions de délégué tactile sont appelées correctement mais ne laissent pas de traces sur la vue comme elles sont supposées le faire. Ce que j'ai jusqu'à présent:L'image dessinée n'apparaît pas sur l'incrustation de l'appareil photo Swift
func createImageOptionsView() { //creates the view above the picker controller overlay view
let imgOptsView = UIView()
let scale = CGAffineTransform(scaleX: 4.0/3.0, y: 4.0/3.0)
imgOptsView.tag = 1
imgOptsView.frame = view.frame
let imageView = UIImageView()
imageView.frame = imgOptsView.frame
imageView.translatesAutoresizingMaskIntoConstraints = true
imageView.transform = scale //to account for the removal of the black bar in the camera
let useButton = UIButton()
imageView.tag = 2
imageView.contentMode = .scaleAspectFit
imageView.image = currentImage
useButton.setImage(#imageLiteral(resourceName: "check circle"), for: .normal)
useButton.translatesAutoresizingMaskIntoConstraints = true
useButton.frame = CGRect(x: view.frame.width/2, y: view.frame.height/2, width: 100, height: 100)
let cancelButton = UIButton()
colorSlider.previewEnabled = true
colorSlider.translatesAutoresizingMaskIntoConstraints = true
imgOptsView.addSubview(imageView)
imgOptsView.addSubview(useButton)
imgOptsView.addSubview(colorSlider)
imgOptsView.isUserInteractionEnabled = true
useButton.addTarget(self, action: #selector(ViewController.usePicture(sender:)), for: .touchUpInside)
picker.cameraOverlayView!.addSubview(imgOptsView)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
mouseSwiped = false //to check if the touch moved or was simply dotted
let touch: UITouch? = touches.first
lastPoint = touch?.location(in: view) //where to start image context from
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
mouseSwiped = true
let touch: UITouch? = touches.first
let currentPoint: CGPoint? = touch?.location(in: view)
UIGraphicsBeginImageContext(view.frame.size) //begin drawing
tempDrawImage.image?.draw(in: CGRect(x: CGFloat(0), y: CGFloat(0), width: CGFloat(view.frame.size.width), height: CGFloat(view.frame.size.height)))
UIGraphicsGetCurrentContext()?.move(to: CGPoint(x: CGFloat(lastPoint.x), y: CGFloat(lastPoint.y)))
UIGraphicsGetCurrentContext()?.addLine(to: CGPoint(x: CGFloat((currentPoint?.x)!), y: CGFloat((currentPoint?.y)!)))
UIGraphicsGetCurrentContext()!.setLineCap(.round)
UIGraphicsGetCurrentContext()?.setLineWidth(1.0)
UIGraphicsGetCurrentContext()?.setStrokeColor(c)
UIGraphicsGetCurrentContext()!.setBlendMode(.normal)
UIGraphicsGetCurrentContext()?.strokePath() //move from lastPoint to currentPoint with these options
tempDrawImage.image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
lastPoint = currentPoint
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
if !mouseSwiped {
UIGraphicsBeginImageContext(view.frame.size)
tempDrawImage.image?.draw(in: CGRect(x: CGFloat(0), y: CGFloat(0), width: CGFloat(view.frame.size.width), height: CGFloat(view.frame.size.height)))
UIGraphicsGetCurrentContext()!.setLineCap(.round)
UIGraphicsGetCurrentContext()?.setLineWidth(1.0)
UIGraphicsGetCurrentContext()?.setStrokeColor(c)
UIGraphicsGetCurrentContext()?.move(to: CGPoint(x: CGFloat(lastPoint.x), y: CGFloat(lastPoint.y)))
UIGraphicsGetCurrentContext()?.addLine(to: CGPoint(x: CGFloat(lastPoint.x), y: CGFloat(lastPoint.y)))
UIGraphicsGetCurrentContext()?.strokePath()
UIGraphicsGetCurrentContext()!.flush()
tempDrawImage.image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
}
UIGraphicsBeginImageContext(mainImage.frame.size)
mainImage.image?.draw(in: CGRect(x: CGFloat(0), y: CGFloat(0), width: CGFloat(view.frame.size.width), height: CGFloat(view.frame.size.height)), blendMode: .normal, alpha: 1.0)
tempDrawImage.setNeedsDisplay()
mainImage.image = UIGraphicsGetImageFromCurrentImageContext() //paste tempImage onto the main image and then start over
tempDrawImage.image = nil
UIGraphicsEndImageContext()
}
func changedColor(_ slider: ColorSlider) {
c = slider.color.cgColor
}
J'ai trouvé 'view.layer.zPosition' . Je l'essayerai une fois que je disposerai d'un appareil physique disponible –
N'a pas fonctionné malheureusement, mais merci –