Мне было интересно, возможно ли каким-либо образом позволить CAShapeLayer выполнить более одного пути, поскольку на самом деле он принимает только один путь в качестве параметра:
CAShapeLayer* myLayer=[CAShapeLayer layer];
myLayer.path=myBezierPath
Но что, если я хотел бы погладить более одного пути на этот слой?
использование
void CGPathAddPath (
CGMutablePathRef path1, // The mutable path to change.
const CGAffineTransform *m, // A pointer to an affine transformation matrix, or NULL if no transformation is needed. If specified, Quartz applies the transformation to path2 before it is added to path1.
CGPathRef path2 // The path to add.
);
Пример кода:
CGMutablePathRef combinedPath = CGPathCreateMutableCopy(path.CGPath);
CGPathAddPath(combinedPath, NULL, path2.CGPath);
CGPathAddPath(combinedPath, NULL, path3.CGPath);
CGPathAddPath(combinedPath, NULL, path4.CGPath);
myLayer.path = combinedPath;
Другой способ сделать это - добавить такие пути...
UIBezierPath *left_path = [UIBezierPath bezierPathWithRect:frame_left];
UIBezierPath *right_path = [UIBezierPath bezierPathWithRect:frame_right];
[left_path appendPath:right_path];
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
shapeLayer.path = left_path.CGPath;
Хорошо, я сам это понял. Можно сделать следующее:
CGMutablePathRef combinedPath= CGPathCreateMutableCopy(path.CGPath);
CGPathAddPath(combinedPath, NULL, path2.CGPath);
CGPathAddPath(combinedPath, NULL, path3.CGPath);
CGPathAddPath(combinedPath, NULL, path4.CGPath);
myLayer.path=combinedPath;
import UIKit
import QuartzCore
import CoreGraphics
class ViewController: UIViewController,UIGestureRecognizerDelegate {
var btnview : UIButton!
var buttonCenter = CGPoint.zero
var firstlayerpoint = CGPoint.zero
var firstLayer = CAShapeLayer()
var secondLayer = CAShapeLayer()
var thirdLayer = CAShapeLayer()
var initialPosition = CGRect()
let label = UILabel()
@IBOutlet weak var nameLabel: UILabel!
@IBOutlet weak var blueLabel: UILabel!
@IBOutlet weak var greenLabel: UILabel!
@IBOutlet weak var redLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
firstLayer = self.createCircleWithBounds(bounds: CGRect(x:0, y:0, width:100,height:100), Position: self.view.center, StrokeColor: UIColor.blue, LineWidth: 20.0)
firstLayer.strokeStart = 0.00
firstLayer.strokeEnd = 0.33
self.view.layer.addSublayer(firstLayer)
secondLayer = self.createCircleWithBounds(bounds: CGRect(x:0, y:0, width:100,height:100), Position: self.view.center, StrokeColor: UIColor.red, LineWidth: 20.0)
secondLayer.strokeStart = 0.33
secondLayer.strokeEnd = 0.66
self.view.layer.addSublayer(secondLayer)
thirdLayer = self.createCircleWithBounds(bounds: CGRect(x:0, y:0, width:100,height:100), Position: self.view.center, StrokeColor: UIColor.green, LineWidth: 20.0)
thirdLayer.strokeStart = 0.66
thirdLayer.strokeEnd = 1.00
self.view.layer.addSublayer(thirdLayer)
btnview = UIButton(frame: CGRect(x: self.view.center.x - 20 , y: self.view.center.y - 20 , width: 40, height: 40))
btnview.backgroundColor = UIColor.gray
btnview.isUserInteractionEnabled = true
let panGesture = UIPanGestureRecognizer(target: self, action: #selector(self.panButton(panGesture:)))
// panGesture.minimumNumberOfTouches = 1
btnview.addGestureRecognizer(panGesture)
self.view.addSubview(btnview)
// Do any additional setup after loading the view, typically from a nib.
nameLabel.isHidden = true
blueLabel.isHidden = true
greenLabel.isHidden = true
redLabel.isHidden = true
}
func panButton(panGesture: UIPanGestureRecognizer) {
//let translation = panGesture.translation(in: self.btnview)
panGesture.view!.center = btnview.center
panGesture.setTranslation(CGPoint.zero, in: self.view)
// var point = CGPoint.zero
// point = firstLayer.frame.size.center
if panGesture.state == .began {
label.isHidden = false
buttonCenter = btnview.center // store old button center
}
else if panGesture.state == .ended || panGesture.state == .failed || panGesture.state == .cancelled {
print(btnview.frame.origin.x)
print(greenLabel.frame.origin.x)
if btnview.frame.origin.x > greenLabel.frame.origin.x
{
// lblflayer.isHidden = false
// lblsecondlayer.isHidden = true
// lblthirdlayer.isHidden = true
nameLabel.isHidden = false
nameLabel.text = "Blue"
nameLabel.backgroundColor = UIColor.blue
}
else if btnview.frame.origin.x > blueLabel.frame.origin.x
{
// print(btnview.frame.origin.x)
// print(lblsecondlayer.frame.origin.x)
// lblsecondlayer.isHidden = false
// lblflayer.isHidden = true
// lblthirdlayer.isHidden = true
nameLabel.isHidden = false
nameLabel.text = "Red"
nameLabel.backgroundColor = UIColor.red
}
else if btnview.frame.origin.x > redLabel.frame.origin.x
{
print(btnview.frame.origin.x)
print(redLabel.frame.origin.x)
greenLabel.isHidden = true
// lblsecondlayer.isHidden = true
// lblthirdlayer.isHidden = false
nameLabel.isHidden = false
nameLabel.text = "Green"
nameLabel.backgroundColor = UIColor.green
}
else
{
nameLabel.isHidden = true
// lblflayer.isHidden = true
// lblsecondlayer.isHidden = true
// lblthirdlayer.isHidden = true
}
btnview.center = buttonCenter // restore button center
}
else
{
let location = panGesture.location(in: view) // get pan location
btnview.center = location // set button to where finger is
}
}
func createCircleWithBounds(bounds: CGRect, Position position: CGPoint, StrokeColor color: UIColor, LineWidth lineWidth: CGFloat) -> CAShapeLayer {
//let shapelayer = CAShapeLayer.layer
let shapelayer = CAShapeLayer()
shapelayer.strokeColor = color.cgColor
shapelayer.fillColor = UIColor.clear.cgColor
shapelayer.path = UIBezierPath(roundedRect: bounds, cornerRadius: bounds.width / 2).cgPath
shapelayer.bounds = bounds
shapelayer.position = position
shapelayer.lineCap = kCALineCapButt
shapelayer.lineWidth = lineWidth
return shapelayer
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}