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Merge pull request #6 from teambition/feature/mini-map
Support to mini map & Update deployment target to 9.0
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| // | ||
| // MiniMap.swift | ||
| // ImageMap | ||
| // | ||
| // Created by wzxjiang on 2018/5/10. | ||
| // Copyright © 2018 wzxjiang. All rights reserved. | ||
| // | ||
|
|
||
| import UIKit | ||
|
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| struct Ratios { | ||
| let top: CGFloat | ||
| let left: CGFloat | ||
| let width: CGFloat | ||
| let height: CGFloat | ||
|
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| static let zero = Ratios(top: 0, left: 0, width: 0, height: 0) | ||
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| init(top: CGFloat, left: CGFloat, width: CGFloat, height: CGFloat) { | ||
| self.top = min(max(top, 0), 1) | ||
| self.left = min(max(left, 0), 1) | ||
| self.width = min(max(width, 0), 1) | ||
| self.height = min(max(height, 0), 1) | ||
| } | ||
| } | ||
|
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| public class MiniMap: UIView { | ||
| public var image = UIImage() { | ||
| didSet { | ||
| updateimageViewSize() | ||
| imageView.image = image | ||
| } | ||
| } | ||
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| private let imageView = UIImageView() | ||
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| private let backgroundLayer = CALayer() | ||
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| private var lineLayer = CAShapeLayer() | ||
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| private var maskLayer = CAShapeLayer() | ||
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| private let _size: CGSize | ||
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| var ratios: Ratios = .zero { | ||
| didSet { | ||
| updateLayer() | ||
| } | ||
| } | ||
|
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| private var imageViewSize: CGSize | ||
|
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| required public init(size: CGSize) { | ||
| _size = size | ||
| imageViewSize = size | ||
| super.init(frame: .zero) | ||
| setup() | ||
| addLayer() | ||
| } | ||
|
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| required public init?(coder aDecoder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
|
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| private func setup() { | ||
| backgroundColor = .black | ||
| addSubview(imageView) | ||
| imageView.translatesAutoresizingMaskIntoConstraints = false | ||
| imageView.centerXAnchor.constraint(equalTo: centerXAnchor).isActive = true | ||
| imageView.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true | ||
| updateImageViewSize() | ||
| } | ||
|
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| private func addLayer() { | ||
| backgroundLayer.frame = CGRect(origin: .zero, size: _size) | ||
| backgroundLayer.backgroundColor = UIColor.black.withAlphaComponent(0.5).cgColor | ||
| imageView.layer.addSublayer(backgroundLayer) | ||
|
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| lineLayer.strokeColor = UIColor.white.cgColor | ||
| lineLayer.fillColor = UIColor.clear.cgColor | ||
| imageView.layer.addSublayer(lineLayer) | ||
| } | ||
|
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| private func updateLayer() { | ||
| var top: CGFloat = imageViewSize.height * ratios.top | ||
| var left: CGFloat = imageViewSize.width * ratios.left | ||
| let width: CGFloat = imageViewSize.width * ratios.width | ||
| let height: CGFloat = imageViewSize.height * ratios.height | ||
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| if top + height > imageViewSize.height { | ||
| top = imageViewSize.height - height | ||
| } | ||
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| if left + width > imageViewSize.width { | ||
| left = imageViewSize.width - width | ||
| } | ||
|
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| let maskBezierPath = UIBezierPath() | ||
| maskBezierPath.move(to: CGPoint(x: 0, y: 0)) | ||
| maskBezierPath.addLine(to: CGPoint(x: 0, y: imageViewSize.height)) | ||
| maskBezierPath.addLine(to: CGPoint(x: imageViewSize.width, y: imageViewSize.height)) | ||
| maskBezierPath.addLine(to: CGPoint(x: imageViewSize.width, y: 0)) | ||
| maskBezierPath.move(to: CGPoint(x: left, y: top)) | ||
| maskBezierPath.addLine(to: CGPoint(x: left + width, y: top)) | ||
| maskBezierPath.addLine(to: CGPoint(x: left + width, y: top + height)) | ||
| maskBezierPath.addLine(to: CGPoint(x: left, y: top + height)) | ||
| maskBezierPath.close() | ||
| maskLayer.path = maskBezierPath.cgPath | ||
| backgroundLayer.mask = maskLayer | ||
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| let lineBezierPath = UIBezierPath() | ||
| lineBezierPath.move(to: CGPoint(x: left, y: top)) | ||
| lineBezierPath.addLine(to: CGPoint(x: left + width, y: top)) | ||
| lineBezierPath.addLine(to: CGPoint(x: left + width, y: top + height)) | ||
| lineBezierPath.addLine(to: CGPoint(x: left, y: top + height)) | ||
| lineBezierPath.close() | ||
| lineBezierPath.stroke() | ||
| lineLayer.path = lineBezierPath.cgPath | ||
| } | ||
|
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| private func updateimageViewSize() { | ||
| let ratio = image.size.width / image.size.height | ||
|
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| if image.size.width > image.size.height { | ||
| imageViewSize = CGSize(width: _size.width, height: _size.width / ratio) | ||
| } else { | ||
| imageViewSize = CGSize(width: _size.height * ratio, height: _size.height) | ||
| } | ||
|
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| updateImageViewSize() | ||
| } | ||
|
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| private func updateImageViewSize() { | ||
| imageView.widthAnchor.constraint(equalToConstant: imageViewSize.width).isActive = true | ||
| imageView.heightAnchor.constraint(equalToConstant: imageViewSize.height).isActive = true | ||
| } | ||
| } |
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