Suppose if I have Four coordinates
let app = XCUIApplication()
let mapView = app.otherElements.matching(identifier: "map_view").element
let co1 = mapView.coordinate(withNormalizedOffset: CGVector(dx: 0.1, dy: 0.15))
let co2 = mapView.coordinate(withNormalizedOffset: CGVector(dx: 0.1, dy: 0.6))
let co3 = mapView.coordinate(withNormalizedOffset: CGVector(dx: 1, dy: 0.6))
let co4 = mapView.coordinate(withNormalizedOffset: CGVector(dx: 1, dy: 0.1))
co1.press(forDuration: 2.0, thenDragTo: co2)
co2.press(forDuration: 0, thenDragTo: co3)
co3.press(forDuration: 0, thenDragTo: co4)
co4.press(forDuration: 0, thenDragTo: co1)
I want to draw a closed path using the above one. When the 2nd line is drawn the first line disappears. I want to press once on the apple map and then drag to join the all four coordinates to form a closed path.
or else
Draw a circle with a certain radius on the map.
You can not draw closed shapes while black box testing.
You can only draw lines (swipes, drag), circular paths (rotate) and some drawings with pinch, zoom.
https://developer.apple.com/documentation/xctest/xcuielement
If you want to draw complex shapes - you probably should switch to white box testing.
Related
I have 4 playing cards on the screen. At the press of a button, I want one of the cards at random to move to the middle of the top half of the screen. Is it possible to create an instance of a constraint (eg: centerXAnchor with constant 0, and centerYAnchor with constant -200) so that I can use CGAffineTransform and move the random image to this point?
Ive tried creating an instance of a CGRect Frame:
let destination = CGPoint(x: 10, y: 10)
but this does not move evenly across devices.
An affine transformation matrix is used to rotate, scale, translate, or skew the objects you draw in a graphics context.
I don't think CGAffineTransform is the ideal thing to use for this task. You aren't doing any the above things (rotate, scale, translate, or skew).
I think you would likely be best using UIView.animateWithDuration
let cardSize = CGSize(width: 100, height: 100)
let card = UIView(frame: CGRect(origin: CGPoint(x: 0, y: 0), size: cardSize))
UIView.animate(withDuration: 1.0) {
card.frame = CGRect(origin: CGPoint(x: 100, y: 100), size: cardSize)
}
Im using the Vision Framework to make a face detection app. The problem im having is when Im using the front facing camera the face detection box doesnt follow my face. When I move my face to the right the face detection box goes to the left and same thing when I move my face to the left the face detection box goes to the right. Why does this happen?
func drawFaceboundingBox(face : VNFaceObservation) {
let transform = CGAffineTransform(scaleX: 1, y: -1).translatedBy(x: 0, y: -frame.height)
let translate = CGAffineTransform.identity.scaledBy(x: frame.width, y: frame.height)
// The coordinates are normalized to the dimensions of the processed image, with the origin at the image's lower-left corner.
let facebounds = face.boundingBox.applying(translate).applying(transform)
_ = createLayer(in: facebounds)
}
Got it to work finally. Had to change the transform to this:
func drawFaceboundingBox(face : VNFaceObservation) {
let transform = CGAffineTransform(scaleX: -1, y: -1).translatedBy(x: -frame.width, y: -frame.height)
let translate = CGAffineTransform.identity.scaledBy(x: frame.width, y: frame.height)
// The coordinates are normalized to the dimensions of the processed image, with the origin at the image's lower-left corner.
let facebounds = face.boundingBox.applying(translate).applying(transform)
_ = createLayer(in: facebounds)
}
I am trying to make an SKPhysics body for this SKSpriteNode using a CGPath polygon.
The problem is that when I check for a collision between this node and the player node, the didBeginContact method is executed even though they did not touch each other. I believe their is something wrong with the coordinates but I cannot see the polygon lines, which makes it difficult for me too see the accuracy of the lines.
Here is the code that I am using:
let triangle = SKSpriteNode(imageNamed: "Triangle_ZigZag")
let trianglePath = CGMutablePath()
trianglePath.addLines(between: [CGPoint(x: triangle.size.width,
y: triangle.size.height),
CGPoint(x: triangle.size.width,
y: - triangle.size.height),
CGPoint(x: -triangle.size.width,
y: triangle.size.height / 2)])
trianglePath.closeSubpath()
triangle.physicsBody = SKPhysicsBody(polygonFrom: trianglePath)
Can someone please help me figure out what am I doing wrong ?
Thank You
FYI physics lines are green, so a green sprite probably isn't the best choice you can't see the lines very well.
your sprite has a centre anchorPoint or an anchorPoint of (0, 0) by default. Therefore your physics points need to take that into account. top right corner would be half the width from centre and half the height from centre etc. You have full width from centre and full height from centre, that is the issue.
trianglePath.addLines(between: [CGPoint(x: triangle.size.width / 2, y: triangle.size.height / 2), CGPoint(x: triangle.size.width / 2, y: -triangle.size.height / 2), CGPoint(x: -triangle.size.width / 2, y: 0)])
How can I draw a 3D object (preferably a rectangle) with core graphics in Swift?
Is it possible or do I have to use a different library?
Is it possible with UIKit?
Borrowing from this answer: https://stackoverflow.com/a/24127282/887210
The key part for your question is:
SCNBox(width: 1, height: 4, length: 9, chamferRadius: 0)
This draws a rectangular box with SceneKit and UIKit. It's set up to be used in a custom UIViewController in your project but it can easily be adapted to other uses.
The example code:
override func loadView() {
// create a scene view with an empty scene
let sceneView = SCNView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
let scene = SCNScene()
sceneView.scene = scene
// default lighting
sceneView.autoenablesDefaultLighting = true
// a camera
let cameraNode = SCNNode()
cameraNode.camera = SCNCamera()
cameraNode.position = SCNVector3(x: 0, y: 0, z: 15)
scene.rootNode.addChildNode(cameraNode)
// a geometry object
let box = SCNBox(width: 1, height: 4, length: 9, chamferRadius: 0)
let boxNode = SCNNode(geometry: box)
scene.rootNode.addChildNode(boxNode)
// configure the geometry object
box.firstMaterial?.diffuse.contents = UIColor.red
box.firstMaterial?.specular.contents = UIColor.white
// set a rotation axis (no angle) to be able to
// use a nicer keypath below and avoid needing
// to wrap it in an NSValue
boxNode.rotation = SCNVector4(x: 1, y: 1, z: 0.0, w: 0.0)
// animate the rotation of the torus
let spin = CABasicAnimation(keyPath: "rotation.w") // only animate the angle
spin.toValue = 2.0*Double.pi
spin.duration = 10
spin.repeatCount = HUGE // for infinity
boxNode.addAnimation(spin, forKey: "spin around")
view = sceneView // Set the view property to the sceneView created here.
}
This question is similar to the question whether it is possible to draw a 3D object on a sheet of paper which is, between, 2D. The third dimension effect is achieved drawing additional lines as the projections. The third dimension could also be perceived through the motion, so, Core Animation is a possible companion to Core Graphics but it requires a lot of calculation, as result, it is quite complicated (using Core Animation).
Actually, SceneKit or Metal are the options to draw 3D models using Swift.
I have an SKSpriteNode image with the code:
let Drake1 = SKSpriteNode(imageNamed: "Drake1")
Drake1.position = CGPoint(x:self.frame.size.width/3, y:self.frame.size.height - 230)
Drake1.zPosition = 2
addChild(Drake1)
//drake movement
let moveRight = SKAction.moveByX(frame.size.width/2.8, y: 0, duration: 2)
let moveLeft = SKAction.moveByX(-frame.size.width/2.8, y: 0, duration: 2)
let moveBackAndForth = SKAction.repeatActionForever(SKAction.sequence([moveRight, moveLeft]))
Drake1.runAction(moveBackAndForth)
What I want to do is, when the image is moving to the right, I want to replace the image with a different SKSpriteNode image, and when it moves back left, I want to use the original image, and repeat this forever. I am struggling with what the code should be for this.
SpriteKit comes with a SKAction, setTexture, to instantaneously change a sprite's texture with relative ease. You can create an inline SKTexture object of each images, use them in SKActions, and add them to your sequence loop, like this:
let moveRight = SKAction.moveByX(frame.size.width/2.8, y: 0, duration: 2)
let moveLeft = SKAction.moveByX(-frame.size.width/2.8, y: 0, duration: 2)
let texRight = SKAction.setTexture(SKTexture(imageNamed: "Drake1r"))
let texLeft = SKAction.setTexture(SKTexture(imageNamed: "Drake1l"))
let moveBackAndForth = SKAction.repeatActionForever(SKAction.sequence([texRight, moveRight, texLeft, moveLeft]))
Drake1.runAction(moveBackAndForth)
Hopefully this works for you! Please note that if the textures are different sizes, you must add resize: Bool to setTexture's arguments.