1

private var touchPoint: CGPoint? = nil

1
2
3
4
5
6
7
8

public override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
    
    let currentPoint = touches.first?.locationInView(self)
    
    rateValue = rateValue + Float((currentPoint!.y - touchPoint!.y) / CGRectGetHeight(self.bounds) * rateDragSensitivity)
    
    touchPoint = currentPoint
}

1
2
3
4
5
6

private func drawFaceWithRect(rect: CGRect) {
    let facePath = UIBezierPath(ovalInRect: rect)
    rateColor.setStroke()
    facePath.lineWidth = rateLineWidth 
    facePath.stroke()
}

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
43
44
45
46

private func drawMouthWithRect(rect: CGRect) {
    let width = CGRectGetWidth(rect)
    let height = CGRectGetWidth(rect)

    
    let leftPoint = CGPointMake(
        width * (1 - rateMouthWidth) / 2,
        height * (1 - rateMouthVerticalPosition))

    
    let rightPoint = CGPointMake(
        width - leftPoint.x,
        leftPoint.y)

    
    let centerPoint = CGPointMake(
        width / 2,
        leftPoint.y + height * 0.3 * (CGFloat(rateValue) - 2.5) / 5)

    
    let halfLipWidth = width * rateMouthWidth * rateLipWidth / 2

    
    let mouthPath = UIBezierPath()

    
    mouthPath.moveToPoint(leftPoint)

    
    mouthPath.addCurveToPoint(
        centerPoint,
        controlPoint1: leftPoint,
        controlPoint2: CGPointMake(centerPoint.x - halfLipWidth, centerPoint.y))

    
    mouthPath.addCurveToPoint(
        rightPoint,
        controlPoint1: CGPointMake(centerPoint.x + halfLipWidth, centerPoint.y),
        controlPoint2: rightPoint)

    
    mouthPath.lineCapStyle = CGLineCap.Round;
    rateColor.setStroke()
    mouthPath.lineWidth = rateLineWidth
    mouthPath.stroke()
}

1
2
3
4

init(hue hue: CGFloat, saturation saturation: CGFloat, brightness brightness: CGFloat, alpha alpha: CGFloat)

func getHue(_ hue: UnsafeMutablePointer<CGFloat>, saturation saturation: UnsafeMutablePointer<CGFloat>, brightness brightness: UnsafeMutablePointer<CGFloat>, alpha alpha: UnsafeMutablePointer<CGFloat>) -> Bool

1

public var rateColorRange: (from: UIColor, to: UIColor)

1
2
3
4
5
6
7
8

let rate: CGFloat = CGFloat(rateValue / 5) 

self.rateColor = UIColor.init(
    hue: hueFrom + hueDelta * rate, 
    saturation: saturationFrom + saturationDelta * rate, 
    brightness: brightnessFrom + brightnessDelta * rate, 
    alpha: alphaFrom + alphaDelta * rate 
)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

@IBInspectable public var rateMouthWidth: CGFloat = 0.6 {
    didSet {
        
        if rateMouthWidth > 0.7 {
            rateMouthWidth = 0.7
        }
        
        if rateMouthWidth < 0.2 {
            rateMouthWidth = 0.2
        }
        
        self.setNeedsDisplay()
    }
}

1
2
3
4

@IBDesignable
public class EmojiRateView: UIView {
    
}

1
2
3

@IBInspectable public var rateLineWidth: CGFloat = 14 {
    
}

1

public var rateValueChangeCallback: ((newRateValue: Float) -> Void)? = nil

1
2
3
4
5
6
7

@IBInspectable public var rateValue: Float = 2.5 {
    didSet {
        
        
        self.rateValueChangeCallback?(newRateValue: rateValue)
    }
}