Trịnh Văn Quân / morooka - ios

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App/camera/ALCameraLib/Views/CropOverlay.swift 4.85 KB
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1341bf603   Trịnh Văn Quân   version 1.1 
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  //
  //  CropOverlay.swift
  //  ALCameraViewController
  //
  //  Created by Alex Littlejohn on 2015/06/30.
  //  Copyright (c) 2015 zero. All rights reserved.
  //
  
  import UIKit
  
  internal class CropOverlay: UIView {
  
      var outerLines = [UIView]()
      var horizontalLines = [UIView]()
      var verticalLines = [UIView]()
      
      var topLeftCornerLines = [UIView]()
      var topRightCornerLines = [UIView]()
      var bottomLeftCornerLines = [UIView]()
      var bottomRightCornerLines = [UIView]()
      
      let cornerDepth: CGFloat = 3
      let cornerWidth: CGFloat = 20
      let lineWidth: CGFloat = 1
      
      internal init() {
          super.init(frame: CGRect.zero)
          createLines()
      }
      
      internal override init(frame: CGRect) {
          super.init(frame: frame)
          createLines()
      }
  
      internal required init?(coder aDecoder: NSCoder) {
          super.init(coder: aDecoder)
          createLines()
      }
      
      override func layoutSubviews() {
          
          for i in 0..<outerLines.count {
              let line = outerLines[i]
              var lineFrame: CGRect
              switch (i) {
              case 0:
                  lineFrame = CGRect(x: 0, y: 0, width: bounds.width, height: lineWidth)
                  break
              case 1:
                  lineFrame = CGRect(x: bounds.width - lineWidth, y: 0, width: lineWidth, height: bounds.height)
                  break
              case 2:
                  lineFrame = CGRect(x: 0, y: bounds.height - lineWidth, width: bounds.width, height: lineWidth)
                  break
              case 3:
                  lineFrame = CGRect(x: 0, y: 0, width: lineWidth, height: bounds.height)
                  break
              default:
                  lineFrame = CGRect.zero
                  break
              }
              
              line.frame = lineFrame
          }
          
          let corners = [topLeftCornerLines, topRightCornerLines, bottomLeftCornerLines, bottomRightCornerLines]
          for i in 0..<corners.count {
              let corner = corners[i]
              var horizontalFrame: CGRect
              var verticalFrame: CGRect
              
              switch (i) {
              case 0:
                  verticalFrame = CGRect(x: -cornerDepth, y:  -cornerDepth, width:  cornerDepth, height:  cornerWidth)
                  horizontalFrame = CGRect(x: -cornerDepth, y:  -cornerDepth, width:  cornerWidth, height:  cornerDepth)
                  break
              case 1:
                  verticalFrame = CGRect(x: bounds.width, y:  -cornerDepth, width:  cornerDepth, height:  cornerWidth)
                  horizontalFrame = CGRect(x: bounds.width + cornerDepth - cornerWidth, y:  -cornerDepth, width:  cornerWidth, height:  cornerDepth)
                  break
              case 2:
                  verticalFrame = CGRect(x: -cornerDepth, y:  bounds.height + cornerDepth - cornerWidth, width:  cornerDepth, height:  cornerWidth)
                  horizontalFrame = CGRect(x: -cornerDepth, y:  bounds.height, width:  cornerWidth, height:  cornerDepth)
                  break
              case 3:
                  verticalFrame = CGRect(x: bounds.width, y:  bounds.height + cornerDepth - cornerWidth, width:  cornerDepth, height:  cornerWidth)
                  horizontalFrame = CGRect(x: bounds.width + cornerDepth - cornerWidth, y:  bounds.height, width:  cornerWidth, height:  cornerDepth)
                  break
              default:
                  verticalFrame = CGRect.zero
                  horizontalFrame = CGRect.zero
                  break
              }
              
              corner[0].frame = verticalFrame
              corner[1].frame = horizontalFrame
          }
          
          let lineThickness = lineWidth / UIScreen.main.scale
          let padding = (bounds.height - (lineThickness * CGFloat(horizontalLines.count))) / CGFloat(horizontalLines.count + 1)
          
          for i in 0..<horizontalLines.count {
              let hLine = horizontalLines[i]
              let vLine = verticalLines[i]
              
              let spacing = (padding * CGFloat(i + 1)) + (lineThickness * CGFloat(i))
              
              hLine.frame = CGRect(x: 0, y: spacing, width: bounds.width, height:  lineThickness)
              vLine.frame = CGRect(x: spacing, y: 0, width: lineThickness, height: bounds.height)
          }
          
      }
      
      func createLines() {
          
          outerLines = [createLine(), createLine(), createLine(), createLine()]
          horizontalLines = [createLine(), createLine()]
          verticalLines = [createLine(), createLine()]
          
          topLeftCornerLines = [createLine(), createLine()]
          topRightCornerLines = [createLine(), createLine()]
          bottomLeftCornerLines = [createLine(), createLine()]
          bottomRightCornerLines = [createLine(), createLine()]
          
          isUserInteractionEnabled = false
      }
      
      func createLine() -> UIView {
          let line = UIView()
          line.backgroundColor = UIColor.white
          addSubview(line)
          return line
      }
  }