├── demo.gif ├── LxThroughPointsBezier-Swift ├── LxThroughPointsBezier-Swift.xcodeproj │ ├── project.xcworkspace │ │ └── contents.xcworkspacedata │ └── project.pbxproj └── LxThroughPointsBezier-Swift │ ├── AppDelegate.swift │ ├── PointView.swift │ ├── Images.xcassets │ └── AppIcon.appiconset │ │ └── Contents.json │ ├── Base.lproj │ ├── Main.storyboard │ └── LaunchScreen.xib │ ├── Info.plist │ └── ViewController.swift ├── .gitignore ├── README.md ├── UIBezierPath+LxThroughPointsBezier.swift └── LICENSE /demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/DeveloperLx/LxThroughPointsBezier-Swift/HEAD/demo.gif -------------------------------------------------------------------------------- /LxThroughPointsBezier-Swift/LxThroughPointsBezier-Swift.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /LxThroughPointsBezier-Swift/LxThroughPointsBezier-Swift/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.swift 3 | // LxThroughPointsBezier-Swift 4 | // 5 | 6 | import UIKit 7 | 8 | @UIApplicationMain 9 | class AppDelegate: UIResponder, UIApplicationDelegate { 10 | 11 | var window: UIWindow? 12 | } 13 | 14 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Xcode 2 | # 3 | build/ 4 | *.pbxuser 5 | !default.pbxuser 6 | *.mode1v3 7 | !default.mode1v3 8 | *.mode2v3 9 | !default.mode2v3 10 | *.perspectivev3 11 | !default.perspectivev3 12 | xcuserdata 13 | *.xccheckout 14 | *.moved-aside 15 | DerivedData 16 | *.hmap 17 | *.ipa 18 | *.xcuserstate 19 | 20 | # CocoaPods 21 | # 22 | # We recommend against adding the Pods directory to your .gitignore. However 23 | # you should judge for yourself, the pros and cons are mentioned at: 24 | # http://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control 25 | # 26 | # Pods/ 27 | -------------------------------------------------------------------------------- /LxThroughPointsBezier-Swift/LxThroughPointsBezier-Swift/PointView.swift: -------------------------------------------------------------------------------- 1 | // 2 | // PointView.swift 3 | // LxThroughPointsBezier-Swift 4 | // 5 | 6 | import UIKit 7 | 8 | private let RADIUS: CGFloat = 5 9 | 10 | class PointView: UIControl { 11 | 12 | class func aInstance() -> PointView { 13 | 14 | let aInstance = PointView(frame: CGRect(origin: CGPointZero, size: CGSize(width: RADIUS * 2, height: RADIUS * 2))) 15 | aInstance.layer.cornerRadius = RADIUS 16 | aInstance.layer.masksToBounds = true 17 | aInstance.backgroundColor = UIColor.magentaColor() 18 | aInstance.addTarget(aInstance, action: Selector("touchDragInside:withEvent:"), forControlEvents: .TouchDragInside) 19 | return aInstance 20 | } 21 | 22 | var dragCallBack = { (pointView: PointView) -> Void in } 23 | 24 | func touchDragInside(pointView: PointView, withEvent event: UIEvent) { 25 | 26 | for touch in event.allTouches()! { 27 | 28 | pointView.center = (touch as! UITouch).locationInView(superview) 29 | dragCallBack(self) 30 | return 31 | } 32 | } 33 | } 34 | -------------------------------------------------------------------------------- /LxThroughPointsBezier-Swift/LxThroughPointsBezier-Swift/Images.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "size" : "29x29", 6 | "scale" : "2x" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "size" : "29x29", 11 | "scale" : "3x" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "size" : "40x40", 16 | "scale" : "2x" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "size" : "40x40", 21 | "scale" : "3x" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "size" : "60x60", 26 | "scale" : "2x" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "size" : "60x60", 31 | "scale" : "3x" 32 | }, 33 | { 34 | "idiom" : "ipad", 35 | "size" : "29x29", 36 | "scale" : "1x" 37 | }, 38 | { 39 | "idiom" : "ipad", 40 | "size" : "29x29", 41 | "scale" : "2x" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "size" : "40x40", 46 | "scale" : "1x" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "size" : "40x40", 51 | "scale" : "2x" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "size" : "76x76", 56 | "scale" : "1x" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "size" : "76x76", 61 | "scale" : "2x" 62 | } 63 | ], 64 | "info" : { 65 | "version" : 1, 66 | "author" : "xcode" 67 | } 68 | } -------------------------------------------------------------------------------- /LxThroughPointsBezier-Swift/LxThroughPointsBezier-Swift/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | -------------------------------------------------------------------------------- /LxThroughPointsBezier-Swift/LxThroughPointsBezier-Swift/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.gener-tech-bj.LxFTPRequestDemo.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | LSRequiresIPhoneOS 24 | 25 | UILaunchStoryboardName 26 | LaunchScreen 27 | UIMainStoryboardFile 28 | Main 29 | UIRequiredDeviceCapabilities 30 | 31 | armv7 32 | 33 | UISupportedInterfaceOrientations 34 | 35 | UIInterfaceOrientationPortrait 36 | UIInterfaceOrientationLandscapeLeft 37 | UIInterfaceOrientationLandscapeRight 38 | 39 | UISupportedInterfaceOrientations~ipad 40 | 41 | UIInterfaceOrientationPortrait 42 | UIInterfaceOrientationPortraitUpsideDown 43 | UIInterfaceOrientationLandscapeLeft 44 | UIInterfaceOrientationLandscapeRight 45 | 46 | 47 | 48 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # LxThroughPointsBezier-Swift 2 | An ideal iOS library using swift programming language. Draw a smooth curve through several points you designated. The curve‘s bend level is adjustable. 3 | Installation 4 | ------------ 5 | You only need drag UIBezierPath+LxThroughPointsBezier.swift to your project. 6 | Support 7 | ------------ 8 | Minimum support iOS version: iOS 5.0 9 | Usage 10 | ----------- 11 | ### 12 | ```swift 13 | var _points = [CGPoint]() 14 | 15 | let point1 = CGPoint(x: 30, y: 210) 16 | let point2 = CGPoint(x: 90, y: 120) 17 | let point3 = CGPoint(x: 120, y: 200) 18 | let point4 = CGPoint(x: 160, y: 240) 19 | let point5 = CGPoint(x: 210, y: 160) 20 | let point6 = CGPoint(x: 240, y: 300) 21 | let point7 = CGPoint(x: 290, y: 140) 22 | 23 | _points.append(point1) 24 | _points.append(point2) 25 | _points.append(point3) 26 | _points.append(point4) 27 | _points.append(point5) 28 | _points.append(point6) 29 | _points.append(point7) 30 | 31 | let _curve = UIBezierPath() 32 | 33 | _curve.contractionFactor = CGFloat(0.7) 34 | _curve.moveToPoint(point1) 35 | _curve.addBezierThrough(points: _points) 36 | 37 | let _shapeLayer = CAShapeLayer() 38 | 39 | _shapeLayer.strokeColor = UIColor.blueColor().CGColor 40 | _shapeLayer.fillColor = nil 41 | _shapeLayer.lineWidth = 3 42 | _shapeLayer.path = _curve.CGPath 43 | _shapeLayer.lineCap = kCALineCapRound 44 | view.layer.addSublayer(_shapeLayer) 45 | ``` 46 | Be careful 47 | ----------- 48 | The good bend level is about 0.6 ~ 0.8. The default and recommended value is 0.7. 49 | You must give at least 1 point for drawing the curve. 50 | Effect 51 | ----------- 52 | * ![demo](demo.gif) 53 | 54 | License 55 | ----------- 56 | LxThroughPointsBezier-Swift is available under the Apache License 2.0. See the LICENSE file for more info. 57 | -------------------------------------------------------------------------------- /LxThroughPointsBezier-Swift/LxThroughPointsBezier-Swift/ViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.swift 3 | // LxThroughPointsBezier-Swift 4 | // 5 | 6 | import UIKit 7 | 8 | class ViewController: UIViewController { 9 | 10 | let _curve = UIBezierPath() 11 | let _shapeLayer = CAShapeLayer() 12 | var _pointViewArray = [PointView]() 13 | 14 | override func viewDidLoad() { 15 | super.viewDidLoad() 16 | 17 | let slider = UISlider() 18 | slider.minimumValue = 0 19 | slider.maximumValue = 1.4 20 | slider.value = 0.7 21 | slider.addTarget(self, action: "sliderValueChanged:", forControlEvents: .ValueChanged) 22 | view.addSubview(slider) 23 | 24 | slider.setTranslatesAutoresizingMaskIntoConstraints(false) 25 | 26 | let sliderHorizontalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("H:|-[slider]-|", options: .DirectionLeadingToTrailing, metrics: nil, views: ["slider":slider]) 27 | let sliderVerticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|-topMargin-[slider(==sliderHeight)]", options: .DirectionLeadingToTrailing, metrics: ["sliderHeight":6, "topMargin":60], views: ["slider":slider]) 28 | 29 | view.addConstraints(sliderHorizontalConstraints) 30 | view.addConstraints(sliderVerticalConstraints) 31 | 32 | var pointArray = [CGPoint]() 33 | 34 | for i in 0 ..< 6 { 35 | 36 | let pointView = PointView.aInstance() 37 | pointView.center = CGPoint(x: i * 60 + 30, y: 420) 38 | pointView.dragCallBack = { [unowned self] (pointView: PointView) -> Void in 39 | 40 | self.sliderValueChanged(slider) 41 | } 42 | view.addSubview(pointView) 43 | _pointViewArray.append(pointView) 44 | 45 | pointArray.append(pointView.center) 46 | } 47 | 48 | _curve.moveToPoint(_pointViewArray.first!.center) 49 | _curve.addBezierThrough(points: pointArray) 50 | 51 | _shapeLayer.strokeColor = UIColor.blueColor().CGColor 52 | _shapeLayer.fillColor = nil 53 | _shapeLayer.lineWidth = 3 54 | _shapeLayer.path = _curve.CGPath 55 | _shapeLayer.lineCap = kCALineCapRound 56 | view.layer.addSublayer(_shapeLayer) 57 | } 58 | 59 | func sliderValueChanged(slider: UISlider) { 60 | 61 | _curve.removeAllPoints() 62 | _curve.contractionFactor = CGFloat(slider.value) 63 | 64 | _curve.moveToPoint(_pointViewArray.first!.center) 65 | 66 | var pointArray = [CGPoint]() 67 | for pointView in _pointViewArray { 68 | 69 | pointArray.append(pointView.center) 70 | } 71 | _curve.addBezierThrough(points: pointArray) 72 | 73 | _shapeLayer.path = _curve.CGPath 74 | } 75 | } 76 | 77 | -------------------------------------------------------------------------------- /LxThroughPointsBezier-Swift/LxThroughPointsBezier-Swift/Base.lproj/LaunchScreen.xib: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | -------------------------------------------------------------------------------- /UIBezierPath+LxThroughPointsBezier.swift: -------------------------------------------------------------------------------- 1 | // 2 | // UIBezierPath+LxThroughPointsBezier.swift 3 | // LxThroughPointsBezier-Swift 4 | // 5 | 6 | import Foundation 7 | import UIKit 8 | 9 | private var _contractionFactor: CGFloat = 0.7 10 | 11 | extension UIBezierPath { 12 | 13 | /// The curve‘s bend level. The good value is about 0.6 ~ 0.8. The default and recommended value is 0.7. 14 | var contractionFactor: CGFloat { 15 | get { 16 | return _contractionFactor 17 | } 18 | set { 19 | _contractionFactor = max(0, newValue) 20 | } 21 | } 22 | 23 | /** 24 | @param: points Points your bezier wants to through. You must give at least 1 point (different from current point) for drawing curve. 25 | */ 26 | func addBezierThrough(#points: [CGPoint]) { 27 | 28 | assert(points.count > 0, "You must give at least 1 point for drawing the bezier."); 29 | 30 | if points.count < 3 { 31 | 32 | switch points.count { 33 | 34 | case 1: 35 | addLineToPoint(points[0]) 36 | case 2: 37 | addLineToPoint(points[1]) 38 | default: 39 | break 40 | } 41 | return 42 | } 43 | 44 | var previousPoint = CGPointZero 45 | 46 | var previousCenterPoint = CGPointZero 47 | var centerPoint = CGPointZero 48 | var centerPointDistance = CGFloat() 49 | 50 | var obliqueAngle = CGFloat() 51 | 52 | var previousControlPoint1 = CGPointZero 53 | var previousControlPoint2 = CGPointZero 54 | var controlPoint1 = CGPointZero 55 | 56 | for var i = 0; i < points.count; i++ { 57 | 58 | let pointI = points[i] 59 | 60 | if i > 0 { 61 | 62 | previousCenterPoint = CenterPointOf(currentPoint, previousPoint) 63 | centerPoint = CenterPointOf(previousPoint, pointI) 64 | 65 | centerPointDistance = DistanceBetween(previousCenterPoint, centerPoint) 66 | 67 | obliqueAngle = ObliqueAngleOfStraightThrough(point1:centerPoint, point2:previousCenterPoint) 68 | 69 | previousControlPoint2 = CGPoint(x: previousPoint.x - 0.5 * contractionFactor * centerPointDistance * cos(obliqueAngle), y: previousPoint.y - 0.5 * contractionFactor * centerPointDistance * sin(obliqueAngle)) 70 | controlPoint1 = CGPoint(x: previousPoint.x + 0.5 * contractionFactor * centerPointDistance * cos(obliqueAngle), y: previousPoint.y + 0.5 * contractionFactor * centerPointDistance * sin(obliqueAngle)) 71 | } 72 | 73 | switch i { 74 | 75 | case 1 : 76 | 77 | addQuadCurveToPoint(previousPoint, controlPoint: previousControlPoint2) 78 | 79 | case 2 ..< points.count - 1 : 80 | 81 | addCurveToPoint(previousPoint, controlPoint1: previousControlPoint1, controlPoint2: previousControlPoint2) 82 | 83 | case points.count - 1 : 84 | 85 | addCurveToPoint(previousPoint, controlPoint1: previousControlPoint1, controlPoint2: previousControlPoint2) 86 | addQuadCurveToPoint(pointI, controlPoint: controlPoint1) 87 | 88 | default: 89 | break 90 | } 91 | 92 | previousControlPoint1 = controlPoint1 93 | previousPoint = pointI 94 | } 95 | } 96 | } 97 | 98 | func ObliqueAngleOfStraightThrough(#point1: CGPoint, #point2: CGPoint) -> CGFloat { // [-π/2, 3π/2) 99 | 100 | var obliqueRatio: CGFloat = 0 101 | var obliqueAngle: CGFloat = 0 102 | 103 | if (point1.x > point2.x) { 104 | 105 | obliqueRatio = (point2.y - point1.y) / (point2.x - point1.x) 106 | obliqueAngle = atan(obliqueRatio) 107 | } 108 | else if (point1.x < point2.x) { 109 | 110 | obliqueRatio = (point2.y - point1.y) / (point2.x - point1.x) 111 | obliqueAngle = CGFloat(M_PI) + atan(obliqueRatio) 112 | } 113 | else if (point2.y - point1.y >= 0) { 114 | 115 | obliqueAngle = CGFloat(M_PI)/2 116 | } 117 | else { 118 | obliqueAngle = -CGFloat(M_PI)/2 119 | } 120 | 121 | return obliqueAngle 122 | } 123 | 124 | func ControlPointForTheBezierCanThrough(#point1: CGPoint, #point2: CGPoint, #point3: CGPoint) -> CGPoint { 125 | 126 | return CGPoint(x: (2 * point2.x - (point1.x + point3.x) / 2), y: (2 * point2.y - (point1.y + point3.y) / 2)); 127 | } 128 | 129 | func DistanceBetween(point1: CGPoint, point2: CGPoint) -> CGFloat { 130 | 131 | return sqrt((point1.x - point2.x) * (point1.x - point2.x) + (point1.y - point2.y) * (point1.y - point2.y)) 132 | } 133 | 134 | func CenterPointOf(point1: CGPoint, point2: CGPoint) -> CGPoint { 135 | 136 | return CGPoint(x: (point1.x + point2.x) / 2, y: (point1.y + point2.y) / 2) 137 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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