I need to control a transparency (or opacity) of my uploaded images (JPEG, PNG, TIFF, etc) with NSSlider. How I can do it?
Here is a code written in AppDelegate.swift
#IBAction func importButton(sender: AnyObject) {
let uploadFile: NSOpenPanel = NSOpenPanel()
uploadFile.allowsMultipleSelection = false
uploadFile.canChooseFiles = true
uploadFile.canChooseDirectories = false
uploadFile.runModal()
let chosenPicture = uploadFile.URL
if(chosenPicture != nil) {
let pictureImport = NSImage(contentsOfURL: chosenPicture!)
imageWell.image = pictureImport
}
}
#IBAction func brightnessSlider(sender: AnyObject) {
//var alpha = sender...
}
Try this
#IBAction func brightnessSlider(sender: NSSlider) {
var alpha = sender.minValue + (sender.doubleValue-sender.minValue)/(sender.maxValue-sender.minValue)
imageWell.alphaValue = CGFloat(alpha)
}
Calculation for alpha becomes simpler if your minValue is always 0:
var alpha = sender.doubleValue/sender.maxValue
Related
Hello I'm new into developing and right now I'm working on an AR application which works with image tracking and it should play different videos on different tracked images.
Right now the video stops, how can I loop the video?
Also if the image is not in the camera view, the video continues. Is there a pause function too?
I would be thankful for every hints.
import UIKit
import SceneKit
import ARKit
class ViewController: UIViewController, ARSCNViewDelegate {
#IBOutlet var sceneView: ARSCNView!
override func viewDidLoad() {
super.viewDidLoad()
sceneView.delegate = self
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let configuration = ARImageTrackingConfiguration()
if let trackedImages = ARReferenceImage.referenceImages(inGroupNamed: "AR Resources", bundle: Bundle.main) {
configuration.trackingImages = trackedImages
configuration.maximumNumberOfTrackedImages = 2
}
sceneView.session.run(configuration)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
sceneView.session.pause()
}
func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {
let node = SCNNode()
if let imageAnchor = anchor as? ARImageAnchor {
let size = imageAnchor.referenceImage.physicalSize
var videoNode = SKVideoNode()
switch imageAnchor.name {
case "Image1":
videoNode = SKVideoNode(fileNamed: "Image1.mp4")
case "Image2":
videoNode = SKVideoNode(fileNamed: "Image2.mp4")
case "Image3":
videoNode = SKVideoNode(fileNamed: "Image3.mp4")
default:
break
}
videoNode.play()
let videoScene = SKScene(size: CGSize(width: 1280, height: 960))
videoScene.anchorPoint = CGPoint(x: 0.5, y: 0.5)
videoScene.addChild(videoNode)
let plane = SCNPlane(width: size.width, height: size.height)
plane.firstMaterial?.diffuse.contents = videoScene
let planeNode = SCNNode(geometry: plane)
plane.firstMaterial?.isDoubleSided = true
planeNode.eulerAngles.x = .pi / 2
node.addChildNode(planeNode)
return node
}
return nil
}
}
iam very new to swiftUI and dont found a way.
I want to create one image (300x100) dyncmicaly by merging three single 100x100 images horizontaly
ImageA(100x100) + ImageB(100x100) + ImageC(100x100) = ImageD(300x100)
Found a way to show them in a HStack but how can is get one new image to send the Date to new function
Regards
Alex
thanks a lot, I tried to use your function but got an error here "Cannot convert value of type 'UIImage?' to expected element type 'UIImage'!
Code should drat 3x zero. in the number-0.png ist just one lagre zero
//
// ContentView.swift
// imagecombine
//
// Created by Alex on 02.08.20.
// Copyright © 2020 Alex. All rights reserved.
//
import SwiftUI
func combineHorizontally(_ images: [UIImage]) -> UIImage? {
guard !images.isEmpty else { return nil }
var size = CGSize.zero
var scale = CGFloat.zero
for image in images {
scale = max(scale, image.scale)
size = CGSize(width: size.width + image.size.width, height: max(size.height, image.size.height))
}
var position = CGPoint.zero
let format = UIGraphicsImageRendererFormat()
format.scale = scale
return UIGraphicsImageRenderer(size: size, format: format).image { context in
for image in images {
image.draw(at: position)
position.x += image.size.width
}
}
}
let redImage = UIImage(named: "number-0.png")
let greenImage = UIImage(named: "number-0.png")
let blueImage = UIImage(named: "number-0.png")
let image = combineHorizontally([redImage, greenImage, blueImage])
struct ContentView: View {
var body: some View {
Image(image)
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
You can use UIImageGraphicsRenderer and draw the images one after another:
func combineHorizontally(_ images: [UIImage]) -> UIImage? {
guard !images.isEmpty else { return nil }
var size = CGSize.zero
var scale = CGFloat.zero
for image in images {
scale = max(scale, image.scale)
size = CGSize(width: size.width + image.size.width, height: max(size.height, image.size.height))
}
var position = CGPoint.zero
let format = UIGraphicsImageRendererFormat()
format.scale = scale
return UIGraphicsImageRenderer(size: size, format: format).image { _ in
for image in images {
image.draw(at: position)
position.x += image.size.width
}
}
}
You said that there were only images and they were 100 × 100, but the above should work regardless of the number and size (memory permitting, of course).
Anyway, this
let image = combineHorizontally([redImage, greenImage, blueImage])
Results in:
To use that in a context where you don’t want an optional, you can use ! forced unwrapping operator, ?? nil coalescing operator, or some other unwrapping pattern, e.g. guard let, if let, etc.
Alternatively, if you don’t want to deal with optionals at all, you can write a rendition that doesn’t return an optional at all (but also doesn’t detect the error scenario where an empty array was provided):
func combineHorizontally(_ images: [UIImage]) -> UIImage {
var size = CGSize.zero
var scale: CGFloat = 1
for image in images {
scale = max(scale, image.scale)
size = CGSize(width: size.width + image.size.width, height: max(size.height, image.size.height))
}
var position = CGPoint.zero
let format = UIGraphicsImageRendererFormat()
format.scale = scale
return UIGraphicsImageRenderer(size: size, format: format).image { _ in
for image in images {
image.draw(at: position)
position.x += image.size.width
}
}
}
I have a NSViewController and a variable num. I want to change the size of the window dynamically according to that variable. Is there any way to do that in swift?
Let's say your window has an IBOutlet named "window", and your dynamic number is named "myDynamicNumber":
func resize() {
var windowFrame = window.frame
let oldWidth = windowFrame.size.width
let oldHeight = windowFrame.size.height
let toAdd = CGFloat(myDynamicNumber)
let newWidth = oldWidth + toAdd
let newHeight = oldHeight + toAdd
windowFrame.size = NSMakeSize(newWidth, newHeight)
window.setFrame(windowFrame, display: true)
}
In Swift 3 to resize the window you use setFrame.
An example from the ViewController:
func resizeWin(size:(CGFloat,CGFloat)){
self.view.window?.setFrame(NSRect(x:0,y:0,width:size.0,height:size.1), display: true)
}
I needed to toggle viewing a text view so I overlaid the window an invisible view - hideRect just short of the text view; in this way I can resize to the smaller (hideRect) and restore later to the original size - origRect. Hide and original rect captured at viewDidLoad(). Swift 3/Xcode 8.3.3
// class global contants
let kTitleUtility = 16
let kTitleNormal = 22
#IBOutlet var hideView: NSView!
var hideRect: NSRect?
var origRect: NSRect?
#IBAction func toggleContent(_ sender: Any) {
// Toggle content visibility
if let window = self.view.window {
let oldSize = window.contentView?.bounds.size
var frame = window.frame
if toggleButton.state == NSOffState {
frame.origin.y += ((oldSize?.height)! - (hideRect?.size.height)!)
window.setFrameOrigin(frame.origin)
window.setContentSize((hideRect?.size)!)
window.showsResizeIndicator = false
window.minSize = NSMakeSize((hideRect?.size.width)!,(hideRect?.size.height)!+CGFloat(kTitleNormal))
creditScroll.isHidden = true
}
else
{
let hugeSize = NSMakeSize(CGFloat(Float.greatestFiniteMagnitude), CGFloat(Float.greatestFiniteMagnitude))
frame.origin.y += ((oldSize?.height)! - (origRect?.size.height)!)
window.setFrameOrigin(frame.origin)
window.setContentSize((origRect?.size)!)
window.showsResizeIndicator = true
window.minSize = NSMakeSize((origRect?.size.width)!,(origRect?.size.height)!+CGFloat(kTitleNormal))
window.maxSize = hugeSize
creditScroll.isHidden = false
}
}
}
This also preserved the widow's visual origin, and sizing minimum.
I made a (basic) game, works perfect, goes to GameOverScene, and when it comes back from GameOverScene to GameScene, the player(spritenode) is not moving anymore..
I commented in the GameScene code which functions its about
I get no error from Xcode!
the bug is in the gamescene.swift file(functions: swipedRight + swipedLeft + swipedUp + swipedDown):
import SpriteKit
class GameScene: SKScene, SKPhysicsContactDelegate {
var kikker:SKSpriteNode = SKSpriteNode()
var auto1:SKSpriteNode = SKSpriteNode()
var lastYieldTimeInterval:NSTimeInterval = NSTimeInterval()
var lastUpdateTimerInterval:NSTimeInterval = NSTimeInterval()
let playerCategory:UInt32 = 0x1 << 1
let auto1Category:UInt32 = 0x1 << 0
required init(coder aDecoder:NSCoder) {
fatalError("NSCoder not supported")
}
override init(size:CGSize) {
super.init(size:size)
anchorPoint = CGPoint(x:0, y:1.0)
let background = SKSpriteNode(imageNamed: "bg5")
var auto1:SKSpriteNode = SKSpriteNode(imageNamed: "auto1")
background.position = CGPoint(x:0, y:0)
background.anchorPoint=CGPoint(x:0,y:1.0)
addChild(background)
kikker = SKSpriteNode(imageNamed:"kikker5")
kikker.anchorPoint = CGPoint(x:0.5, y:0.5)
kikker.xScale = 0.22
kikker.yScale = 0.22
self.physicsWorld.gravity = CGVectorMake(0,0)
self.physicsWorld.contactDelegate = self
kikker.physicsBody?.categoryBitMask = playerCategory
kikker.physicsBody?.contactTestBitMask = auto1Category
kikker.physicsBody?.collisionBitMask = 0
kikker.physicsBody?.usesPreciseCollisionDetection = true
kikker.physicsBody = SKPhysicsBody(circleOfRadius: kikker.size.width/2)
kikker.physicsBody?.dynamic = false
kikker.position = CGPointMake(self.frame.size.width/2, -610)
addChild(kikker)
println(kikker.position)
}
func didBeginContact(contact: SKPhysicsContact!) {
var firstBody:SKPhysicsBody
var secondBody:SKPhysicsBody
if(contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask){
firstBody = contact.bodyA
secondBody = contact.bodyB
}else{
firstBody = contact.bodyB
secondBody = contact.bodyA
}
if((firstBody.categoryBitMask & auto1Category) != 0 && (secondBody.categoryBitMask & playerCategory) != 0)
{
println("aasda")
aangereden(contact.bodyB.node as SKSpriteNode, player: contact.bodyA.node as SKSpriteNode)
}
}
func addCar(){
var auto1:SKSpriteNode = SKSpriteNode(imageNamed: "auto2")
auto1.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(auto1.size.width/2, auto1.size.height/2) )
auto1.physicsBody?.dynamic = true
auto1.physicsBody?.categoryBitMask = auto1Category
auto1.physicsBody?.contactTestBitMask = playerCategory
auto1.physicsBody?.collisionBitMask = 0
auto1.physicsBody?.usesPreciseCollisionDetection = true
let position : CGFloat = 51 + (CGFloat(arc4random_uniform(4)+2)*(-111))
auto1.anchorPoint = CGPoint(x:0.5, y:0.5)
auto1.position = CGPointMake(-auto1.size.width/2, position)
self.addChild(auto1)
let minDuration = 2.5
let maxDuration = 4.0
let rangeDuration = maxDuration - minDuration
let duration = Int(arc4random()) % Int(rangeDuration) + Int(minDuration)
var actionArray:NSMutableArray = NSMutableArray()
actionArray.addObject(SKAction.moveTo(CGPointMake(375 + auto1.size.width/2, position), duration: NSTimeInterval(duration)))
actionArray.addObject(SKAction.removeFromParent())
auto1.runAction(SKAction.sequence(actionArray))
}
println("DOOD")
player.removeFromParent()
}
func updateWithTimeSinceLastUpdate(timeSinceLastUpdate:CFTimeInterval){
lastYieldTimeInterval += timeSinceLastUpdate
if (lastYieldTimeInterval > 2.5){
lastYieldTimeInterval = 0
addCar()
}
}
//#1 function not working after changing scenes: the function is executing, the println works
but for some reason the runAction doesnt do its job, the node(kikker) is not moving as it should
func swipedRight1(sender:UISwipeGestureRecognizer){
var naarRechts = SKAction()
var positionX = kikker.position.x
println("right2")
if(kikker.position.x<200){
println(positionX)
positionX = kikker.position.x + 125
println(positionX)
naarRechts = SKAction.moveToX(positionX , duration: 0.25)
kikker.zRotation=(-1.570)
kikker.runAction(naarRechts)
}
}
//#2 function not working, same story
func swipedLeft1(sender:UISwipeGestureRecognizer){
var naarLinks = SKAction()
var positionX = kikker.position.x
if(kikker.position.x>150){
positionX = kikker.position.x - 125
naarLinks = SKAction.moveToX(positionX , duration: 0.25)
kikker.zRotation=(1.570)
kikker.runAction(naarLinks)
}
}
//#3 function not working, same story
func swipedDown1(sender:UISwipeGestureRecognizer){
var naarBeneden = SKAction()
var positionY = kikker.position.y
if(kikker.position.y>(-600)){
positionY = kikker.position.y - 111
naarBeneden = SKAction.moveToY(positionY , duration: 0.25)
kikker.zRotation=3.141
kikker.runAction(naarBeneden)
}
}
//#4 function not working, same story
func swipedUp1(sender:UISwipeGestureRecognizer){
var naarBoven = SKAction()
var positionY = kikker.position.y
if(kikker.position.y < (-60)){
positionY = kikker.position.y + 111
naarBoven = SKAction.moveToY(positionY, duration: 0.25)
kikker.zRotation=0
kikker.runAction(naarBoven)
}
if(positionY > (-60)){
var gameOverScene:SKScene = GameOverScene(size: self.size)
self.view?.presentScene(gameOverScene)
}
}
override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
var timeSinceLastUpdate = currentTime - lastUpdateTimerInterval
lastUpdateTimerInterval = currentTime
if (timeSinceLastUpdate > 1){
timeSinceLastUpdate = 1/60
lastUpdateTimerInterval = currentTime
}
updateWithTimeSinceLastUpdate(timeSinceLastUpdate)
}
}
here the GameOverScene file:
import UIKit
import SpriteKit
class GameOverScene: SKScene {
override init(size:CGSize){
super.init(size:size)
self.backgroundColor = SKColor.whiteColor()
var message:NSString = NSString()
message = "Game Over"
var label:SKLabelNode = SKLabelNode(fontNamed:"DamascusBold")
label.text = message
label.fontColor = SKColor.blackColor()
label.position = CGPointMake(self.size.width/2, self.size.height/2)
self.addChild(label)
var scene:GameScene!
self.runAction(SKAction.sequence([SKAction.waitForDuration(3.0),
SKAction.runBlock({
// var transition:SKTransition = SKTransition.flipHorizontalWithDuration(0.5)
var scene1:SKScene = GameScene(size: self.size)
self.view?.presentScene(scene1)
})
] ))
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
gameviewcontroller file:
import UIKit
import SpriteKit
import AVFoundation
class GameViewController: UIViewController, UITextFieldDelegate{
var scene:GameScene!
func swipedRight(sender: UISwipeGestureRecognizer){
scene.swipedRight1(sender)
}
func swipedLeft(sender: UISwipeGestureRecognizer){
scene.swipedLeft1(sender)
}
func swipedDown(sender: UISwipeGestureRecognizer){
scene.swipedDown1(sender)
}
func swipedUp(sender: UISwipeGestureRecognizer){
scene.swipedUp1(sender)
}
override func viewDidLoad() {
super.viewDidLoad()
let skView = view as SKView
skView.multipleTouchEnabled = false
scene = GameScene(size: skView.bounds.size)
scene.scaleMode = SKSceneScaleMode.AspectFill
skView.presentScene(scene)
let swipeRight:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedRight:"))
swipeRight.direction = .Right
view.addGestureRecognizer(swipeRight)
let swipeLeft:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedLeft:"))
swipeLeft.direction = .Left
view.addGestureRecognizer(swipeLeft)
let swipeUp:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedUp:"))
swipeUp.direction = .Up
view.addGestureRecognizer(swipeUp)
let swipeDown:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedDown:"))
swipeDown.direction = .Down
view.addGestureRecognizer(swipeDown)
}
override func prefersStatusBarHidden() -> Bool {
return true
}
}
You're calling your swipedUp1 (etc) methods on the wrong scene. Here's what's happening:
Your view controller has a reference to the GameScene instance that you start with. Its gesture action methods call to that, and all is well.
When you start a new game from GameOverScene, that creates a new instance of GameScene and presents it in the view. Now you have two instances of GameScene: the one your view controller is still pointing to, and the one the view is now rendering.
When you're gesture actions fire, they're still talking to the first GameScene. So your log lines get printed, but you don't see anything happen because the second GameScene is the one being displayed.
You probably don't want two scenes sticking around, anyway.
You can fix both problems by eliminatimg the scene property in your view controller and having your gesture actions call through to view.scene instead (after appropriate casting):
func swipedUp(sender: UISwipeGestureRecognizer) {
let skView = view as SKView
let gameScene = skView.scene as GameScene
gameScene.swipedUp1(sender)
}
This way, the swipe goes to whichever scene the view controller's view is currently presenting.
Alternatively, you could keep your original swipedUp (etc) code, and change scene from a stored property to a read-only computed one that always gets you the currently presented scene:
var scene: GameScene {
let skView = view as SKView
return skView.scene as GameScene
}
is it possible to send an UIImage in some vector format to an php server, and how would it be done? It's important that the image would be in some vector format.
I have created an app where you can draw lines, I would like to save those drawn lines to an image in some vector format. I say some, becouse I'm not sure what format is the best.
I just need to be able to save to it and read it.
Here is my code for drawing.
#IBAction func panning(sender: AnyObject) {
pan.maximumNumberOfTouches = 1;
pan.minimumNumberOfTouches = 1;
var currentPoint:CGPoint = pan.locationInView(self);
var midPoint:CGPoint = midpoint(previousPoint, p1: currentPoint);
if(pan.state == UIGestureRecognizerState.Began){
path.moveToPoint(currentPoint);
} else if (pan.state == UIGestureRecognizerState.Changed){
path.addQuadCurveToPoint(midPoint, controlPoint: previousPoint);
}
path.lineCapStyle = kCGLineCapRound;
path.lineWidth = 10;
previousPoint = currentPoint;
self.setNeedsDisplay();
}
override func drawRect(rect: CGRect) {
//println(pan.velocityInView(self));
UIColor.redColor().setStroke();
path.stroke();
}
#IBAction func sendImage(sender: AnyObject) {
UIGraphicsBeginImageContext(self.bounds.size);
var ctx:CGContextRef = UIGraphicsGetCurrentContext();
self.layer.renderInContext(ctx);
var saveImg = UIGraphicsGetImageFromCurrentImageContext();
UIImageWriteToSavedPhotosAlbum(saveImg, self, Selector("image:didFinishSavingWithError:contextInfo:"), nil);
UIGraphicsEndImageContext();
}
func image(image: UIImage, didFinishSavingWithError error: NSErrorPointer, contextInfo: UnsafePointer<()>) {
dispatch_async(dispatch_get_main_queue(), {
UIAlertView(title: "Success", message: "This image has been saved to your Camera Roll successfully", delegate: nil, cancelButtonTitle: "Close").show()
})
}
func midpoint(p0:CGPoint, p1:CGPoint)->CGPoint{
var retCG:CGPoint = CGPoint(x: (p0.x + p1.x) / 2.0, y: (p0.y + p1.y) / 2.0);
return retCG;
}
Thanks.