Customizable Tooltips

TooltipView.swift

//
// TooltipView.swift
// Customizable Tooltips
//
// Copyright © 2017 Simon Wuyts
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import UIKit

@IBDesignable
class TooltipView: UIView {
    
    //MARK: - IBInspectable
    
    @IBInspectable var arrowTopLeft: Bool = false
    @IBInspectable var arrowTopCenter: Bool = true
    @IBInspectable var arrowTopRight: Bool = false
    @IBInspectable var arrowBottomLeft: Bool = false
    @IBInspectable var arrowBottomCenter: Bool = false
    @IBInspectable var arrowBottomRight: Bool = false
    
    @IBInspectable var fillColor: UIColor = UIColor.white
    
    @IBInspectable var borderColor: UIColor = UIColor(red:0, green:0, blue:0, alpha:0.05)
    @IBInspectable var borderRadius: CGFloat = 18
    @IBInspectable var borderWidth: CGFloat = 1
    
    @IBInspectable var shadowColor: UIColor = UIColor(red:0, green:0, blue:0, alpha:0.14)
    @IBInspectable var shadowOffsetX: CGFloat = 0
    @IBInspectable var shadowOffsetY: CGFloat = 2
    @IBInspectable var shadowBlur: CGFloat = 10
    
    //MARK: - Global Variables
    
    var tooltipWidth = 0
    var tooltipHeight = 0
    
    //MARK: - Initialization
    
    override func draw(_ rect: CGRect) {
        drawTooltip()
    }
    
    //MARK: - Private Methods
    
    // Orientation methods
    
    private func topLeft(_ x: CGFloat, _ y: CGFloat) -> CGPoint {
        return CGPoint(x: x, y: y)
    }
    
    private func topRight(_ x: CGFloat, _ y: CGFloat) -> CGPoint {
        return CGPoint(x: CGFloat(tooltipWidth) - x, y: y)
    }
    
    private func bottomLeft(_ x: CGFloat, _ y: CGFloat) -> CGPoint {
        return CGPoint(x: x, y: CGFloat(tooltipHeight) - y)
    }
    
    private func bottomRight(_ x: CGFloat, _ y: CGFloat) -> CGPoint {
        return CGPoint(x: CGFloat(tooltipWidth) - x, y: CGFloat(tooltipHeight) - y)
    }
    
    // Draw methods
    
    private func drawTooltip() {
        
        tooltipWidth = Int(bounds.width)
        tooltipHeight = Int(bounds.height)
        
        // Define Bubble Shape
        
        let bubblePath = UIBezierPath()
        
        // Top left corner
        
        bubblePath.move(to: topLeft(0, borderRadius))
        bubblePath.addCurve(to: topLeft(borderRadius, 0), controlPoint1: topLeft(0, borderRadius / 2), controlPoint2: topLeft(borderRadius / 2, 0))
        
        // Top right corner
        
        bubblePath.addLine(to: topRight(borderRadius, 0))
        bubblePath.addCurve(to: topRight(0, borderRadius), controlPoint1: topRight(borderRadius / 2, 0), controlPoint2: topRight(0, borderRadius / 2))
        
        // Bottom right corner
        
        bubblePath.addLine(to: bottomRight(0, borderRadius))
        bubblePath.addCurve(to: bottomRight(borderRadius, 0), controlPoint1: bottomRight(0, borderRadius / 2), controlPoint2: bottomRight(borderRadius / 2, 0))
        
        // Bottom left corner
        
        bubblePath.addLine(to: bottomLeft(borderRadius, 0))
        bubblePath.addCurve(to: bottomLeft(0, borderRadius), controlPoint1: bottomLeft(borderRadius / 2, 0), controlPoint2: bottomLeft(0, borderRadius / 2))
        bubblePath.close()
        
        // Arrow
        
        if(arrowTopLeft) {
            bubblePath.move(to: topLeft(3, 10))
            bubblePath.addLine(to: topLeft(3, -4))
            bubblePath.addLine(to: topLeft(16, 2))
            bubblePath.close()
        }
        
        if(arrowTopCenter) {
            bubblePath.move(to: topLeft(CGFloat((tooltipWidth / 2) - 5), 0))
            bubblePath.addLine(to: topLeft(CGFloat(tooltipWidth / 2), -8))
            bubblePath.addLine(to: topLeft(CGFloat(tooltipWidth / 2 + 5), 0))
            bubblePath.close()
        }
        
        if(arrowTopRight) {
            bubblePath.move(to: topRight(16, 2))
            bubblePath.addLine(to: topRight(3, -4))
            bubblePath.addLine(to: topRight(3, 10))
            bubblePath.close()
        }
        
        if(arrowBottomLeft) {
            bubblePath.move(to: bottomLeft(16, 2))
            bubblePath.addLine(to: bottomLeft(3, -4))
            bubblePath.addLine(to: bottomLeft(3, 10))
            bubblePath.close()
        }
        
        if(arrowBottomCenter) {
            bubblePath.move(to: bottomLeft(CGFloat((tooltipWidth / 2) - 5), 0))
            bubblePath.addLine(to: bottomLeft(CGFloat(tooltipWidth / 2), -8))
            bubblePath.addLine(to: bottomLeft(CGFloat(tooltipWidth / 2 + 5), 0))
            bubblePath.close()
        }
        
        if(arrowBottomRight) {
            bubblePath.move(to: bottomRight(3, 10))
            bubblePath.addLine(to: bottomRight(3, -4))
            bubblePath.addLine(to: bottomRight(16, 2))
            bubblePath.close()
        }
        
        // Shadow Layer
        
        let shadowShape = CAShapeLayer()
        shadowShape.path = bubblePath.cgPath
        shadowShape.fillColor = fillColor.cgColor
        shadowShape.shadowColor = shadowColor.cgColor
        shadowShape.shadowOffset = CGSize(width: CGFloat(shadowOffsetX), height: CGFloat(shadowOffsetY))
        shadowShape.shadowRadius = CGFloat(shadowBlur)
        shadowShape.shadowOpacity = 0.8
        
        // Border Layer
        
        let borderShape = CAShapeLayer()
        borderShape.path = bubblePath.cgPath
        borderShape.fillColor = fillColor.cgColor
        borderShape.strokeColor = borderColor.cgColor
        borderShape.lineWidth = CGFloat(borderWidth*2)
        
        // Fill Layer
        
        let fillShape = CAShapeLayer()
        fillShape.path = bubblePath.cgPath
        fillShape.fillColor = fillColor.cgColor
        
        // Add Sublayers
        
        self.layer.insertSublayer(shadowShape, at: 0)
        self.layer.insertSublayer(borderShape, at: 0)
        self.layer.insertSublayer(fillShape, at: 0)
        
    }
    
}

Hey Simon, nice work!

I think you forgot to redraw the view after changing the arrows. Right now, It works pretty well on Interface Builder but nothing happens when you change the attributes by code.

let frame = CGRect(x: 50, y: 50, width: 100, height: 40)

let view = TooltipView(frame: frame)
view.backgroundColor = UIColor.clear
view.isOpaque = false
view.arrowTopCenter = false // The top center arrow is still visible after this
view.arrowTopRight = true // The top right arrow isn't visible after this

yeah its not work if we change in code

Great work..