├── preview1.gif ├── preview2.gif ├── TabBarInteraction ├── Assets.xcassets │ ├── Contents.json │ ├── first.imageset │ │ ├── first.pdf │ │ └── Contents.json │ ├── second.imageset │ │ ├── second.pdf │ │ └── Contents.json │ ├── clock.imageset │ │ ├── clock@2x.png │ │ ├── clock@3x.png │ │ └── Contents.json │ └── AppIcon.appiconset │ │ └── Contents.json ├── Base.lproj │ ├── LaunchScreen.storyboard │ └── Main.storyboard ├── SecondViewController.swift ├── Info.plist ├── AppDelegate.swift ├── FirstViewController.swift ├── TabbarInteractable.swift ├── ClockView.swift └── WheelView.swift ├── README.md ├── TabBarInteraction.xcodeproj ├── project.xcworkspace │ ├── contents.xcworkspacedata │ └── xcshareddata │ │ └── IDEWorkspaceChecks.plist └── project.pbxproj ├── LICENSE └── .gitignore /preview1.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/potato04/TabBarInteraction/HEAD/preview1.gif -------------------------------------------------------------------------------- /preview2.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/potato04/TabBarInteraction/HEAD/preview2.gif -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "version" : 1, 4 | "author" : "xcode" 5 | } 6 | } -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/first.imageset/first.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/potato04/TabBarInteraction/HEAD/TabBarInteraction/Assets.xcassets/first.imageset/first.pdf -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/second.imageset/second.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/potato04/TabBarInteraction/HEAD/TabBarInteraction/Assets.xcassets/second.imageset/second.pdf -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/clock.imageset/clock@2x.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/potato04/TabBarInteraction/HEAD/TabBarInteraction/Assets.xcassets/clock.imageset/clock@2x.png -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/clock.imageset/clock@3x.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/potato04/TabBarInteraction/HEAD/TabBarInteraction/Assets.xcassets/clock.imageset/clock@3x.png -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## 让 TabBar 根据用户交互而动画的一种尝试 2 | 3 | 实现详见博客: [Tab Bar 的图标原来还可以这样玩](https://juejin.im/post/5c9fa72d6fb9a05e6835c8a6) 4 | 5 |

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8 | -------------------------------------------------------------------------------- /TabBarInteraction.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/first.imageset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "universal", 5 | "filename" : "first.pdf" 6 | } 7 | ], 8 | "info" : { 9 | "version" : 1, 10 | "author" : "xcode" 11 | } 12 | } -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/second.imageset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "universal", 5 | "filename" : "second.pdf" 6 | } 7 | ], 8 | "info" : { 9 | "version" : 1, 10 | "author" : "xcode" 11 | } 12 | } -------------------------------------------------------------------------------- /TabBarInteraction.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/clock.imageset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "universal", 5 | "scale" : "1x" 6 | }, 7 | { 8 | "idiom" : "universal", 9 | "filename" : "clock@2x.png", 10 | "scale" : "2x" 11 | }, 12 | { 13 | "idiom" : "universal", 14 | "filename" : "clock@3x.png", 15 | "scale" : "3x" 16 | } 17 | ], 18 | "info" : { 19 | "version" : 1, 20 | "author" : "xcode" 21 | } 22 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2019 Potato04 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Xcode 2 | # 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore 4 | 5 | ## Build generated 6 | build/ 7 | DerivedData/ 8 | 9 | ## Various settings 10 | *.pbxuser 11 | !default.pbxuser 12 | *.mode1v3 13 | !default.mode1v3 14 | *.mode2v3 15 | !default.mode2v3 16 | *.perspectivev3 17 | !default.perspectivev3 18 | xcuserdata/ 19 | 20 | ## Other 21 | *.moved-aside 22 | *.xccheckout 23 | *.xcscmblueprint 24 | 25 | ## Obj-C/Swift specific 26 | *.hmap 27 | *.ipa 28 | *.dSYM.zip 29 | *.dSYM 30 | 31 | ## Playgrounds 32 | timeline.xctimeline 33 | playground.xcworkspace 34 | 35 | # Swift Package Manager 36 | # 37 | # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies. 38 | # Packages/ 39 | # Package.pins 40 | # Package.resolved 41 | .build/ 42 | 43 | # CocoaPods 44 | # 45 | # We recommend against adding the Pods directory to your .gitignore. However 46 | # you should judge for yourself, the pros and cons are mentioned at: 47 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control 48 | # 49 | # Pods/ 50 | 51 | # Carthage 52 | # 53 | # Add this line if you want to avoid checking in source code from Carthage dependencies. 54 | # Carthage/Checkouts 55 | 56 | Carthage/Build 57 | 58 | # fastlane 59 | # 60 | # It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the 61 | # screenshots whenever they are needed. 62 | # For more information about the recommended setup visit: 63 | # https://docs.fastlane.tools/best-practices/source-control/#source-control 64 | 65 | fastlane/report.xml 66 | fastlane/Preview.html 67 | fastlane/screenshots/**/*.png 68 | fastlane/test_output 69 | -------------------------------------------------------------------------------- /TabBarInteraction/Base.lproj/LaunchScreen.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 | -------------------------------------------------------------------------------- /TabBarInteraction/SecondViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // SecondViewController.swift 3 | // TabBarInteraction 4 | // 5 | // Created by potato04 on 2019/3/27. 6 | // Copyright © 2019 potato04. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | class SecondViewController: UIViewController, TabbarInteractable { 12 | 13 | private var clockView: ClockIconView! 14 | @IBOutlet weak var datePicker: UIDatePicker! 15 | let calendar = Calendar.current 16 | lazy var defaultDate: Date = { 17 | var component = DateComponents() 18 | component.hour = 9 19 | component.minute = 0 20 | return calendar.date(from: component)! 21 | }() 22 | 23 | override func viewDidLoad() { 24 | super.viewDidLoad() 25 | // Do any additional setup after loading the view. 26 | 27 | clockView = ClockIconView(frame: CGRect.zero) 28 | clockView.lineWidth = 2 29 | clockView.tintColor = UIColor.white 30 | clockView.layer.cornerRadius = 12.5 31 | 32 | datePicker.addTarget(self, action: #selector(datePickerValueChanged(_:)), for: .valueChanged) 33 | datePicker.date = defaultDate 34 | 35 | replaceSwappableImageViews(with: clockView, and: CGSize(width: 25, height: 25)) 36 | } 37 | 38 | 39 | override func viewDidAppear(_ animated: Bool) { 40 | clockView.backgroundColor = view.tintColor 41 | } 42 | override func viewDidDisappear(_ animated: Bool) { 43 | clockView.backgroundColor = UIColor.gray 44 | } 45 | 46 | @objc func datePickerValueChanged(_ sender: UIDatePicker) { 47 | let selectedDate = sender.date 48 | let hour = calendar.component(.hour, from: selectedDate) 49 | let minute = calendar.component(.minute, from: selectedDate) 50 | clockView.hour = hour 51 | clockView.minute = minute 52 | } 53 | } 54 | -------------------------------------------------------------------------------- /TabBarInteraction/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleVersion 20 | 1 21 | LSRequiresIPhoneOS 22 | 23 | UILaunchStoryboardName 24 | LaunchScreen 25 | UIMainStoryboardFile 26 | Main 27 | UIRequiredDeviceCapabilities 28 | 29 | armv7 30 | 31 | UIStatusBarTintParameters 32 | 33 | UINavigationBar 34 | 35 | Style 36 | UIBarStyleDefault 37 | Translucent 38 | 39 | 40 | 41 | UISupportedInterfaceOrientations 42 | 43 | UIInterfaceOrientationPortrait 44 | UIInterfaceOrientationLandscapeLeft 45 | UIInterfaceOrientationLandscapeRight 46 | 47 | UISupportedInterfaceOrientations~ipad 48 | 49 | UIInterfaceOrientationPortrait 50 | UIInterfaceOrientationPortraitUpsideDown 51 | UIInterfaceOrientationLandscapeLeft 52 | UIInterfaceOrientationLandscapeRight 53 | 54 | 55 | 56 | -------------------------------------------------------------------------------- /TabBarInteraction/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "size" : "20x20", 6 | "scale" : "2x" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "size" : "20x20", 11 | "scale" : "3x" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "size" : "29x29", 16 | "scale" : "2x" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "size" : "29x29", 21 | "scale" : "3x" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "size" : "40x40", 26 | "scale" : "2x" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "size" : "40x40", 31 | "scale" : "3x" 32 | }, 33 | { 34 | "idiom" : "iphone", 35 | "size" : "60x60", 36 | "scale" : "2x" 37 | }, 38 | { 39 | "idiom" : "iphone", 40 | "size" : "60x60", 41 | "scale" : "3x" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "size" : "20x20", 46 | "scale" : "1x" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "size" : "20x20", 51 | "scale" : "2x" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "size" : "29x29", 56 | "scale" : "1x" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "size" : "29x29", 61 | "scale" : "2x" 62 | }, 63 | { 64 | "idiom" : "ipad", 65 | "size" : "40x40", 66 | "scale" : "1x" 67 | }, 68 | { 69 | "idiom" : "ipad", 70 | "size" : "40x40", 71 | "scale" : "2x" 72 | }, 73 | { 74 | "idiom" : "ipad", 75 | "size" : "76x76", 76 | "scale" : "1x" 77 | }, 78 | { 79 | "idiom" : "ipad", 80 | "size" : "76x76", 81 | "scale" : "2x" 82 | }, 83 | { 84 | "idiom" : "ipad", 85 | "size" : "83.5x83.5", 86 | "scale" : "2x" 87 | }, 88 | { 89 | "idiom" : "ios-marketing", 90 | "size" : "1024x1024", 91 | "scale" : "1x" 92 | } 93 | ], 94 | "info" : { 95 | "version" : 1, 96 | "author" : "xcode" 97 | } 98 | } -------------------------------------------------------------------------------- /TabBarInteraction/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.swift 3 | // TabBarInteraction 4 | // 5 | // Created by potato04 on 2019/3/27. 6 | // Copyright © 2019 potato04. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | @UIApplicationMain 12 | class AppDelegate: UIResponder, UIApplicationDelegate { 13 | 14 | var window: UIWindow? 15 | 16 | 17 | func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { 18 | // Override point for customization after application launch. 19 | return true 20 | } 21 | 22 | func applicationWillResignActive(_ application: UIApplication) { 23 | // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state. 24 | // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game. 25 | } 26 | 27 | func applicationDidEnterBackground(_ application: UIApplication) { 28 | // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 29 | // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. 30 | } 31 | 32 | func applicationWillEnterForeground(_ application: UIApplication) { 33 | // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background. 34 | } 35 | 36 | func applicationDidBecomeActive(_ application: UIApplication) { 37 | // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface. 38 | } 39 | 40 | func applicationWillTerminate(_ application: UIApplication) { 41 | // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. 42 | } 43 | 44 | 45 | } 46 | 47 | -------------------------------------------------------------------------------- /TabBarInteraction/FirstViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // FirstViewController.swift 3 | // TabBarInteraction 4 | // 5 | // Created by potato04 on 2019/3/27. 6 | // Copyright © 2019 potato04. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | class FirstViewController: UIViewController, TabbarInteractable { 12 | 13 | private var wheelView: WheelView! 14 | 15 | @IBOutlet weak var tableView: UITableView! 16 | let data = Array(1...100).map { "\($0)" } 17 | 18 | override func viewDidLoad() { 19 | super.viewDidLoad() 20 | // Do any additional setup after loading the view. 21 | 22 | tableView.delegate = self 23 | tableView.dataSource = self 24 | tableView.register(UITableViewCell.self, forCellReuseIdentifier: "DefaultCell") 25 | tableView.rowHeight = 44 26 | 27 | wheelView = WheelView(frame: CGRect.zero) 28 | wheelView.font = UIFont.systemFont(ofSize: 15, weight: .bold) 29 | wheelView.borderWidth = 1 30 | wheelView.backgroundColor = UIColor.white 31 | wheelView.contents = data 32 | 33 | replaceSwappableImageViews(with: wheelView, and: CGSize(width: 25, height: 25)) 34 | } 35 | 36 | override func viewDidAppear(_ animated: Bool) { 37 | scrollViewDidScroll(self.tableView) 38 | wheelView.tintColor = view.tintColor 39 | } 40 | override func viewDidDisappear(_ animated: Bool) { 41 | wheelView.tintColor = UIColor.gray 42 | } 43 | } 44 | 45 | // MARK: UITableViewDataSource 46 | extension FirstViewController: UITableViewDataSource { 47 | func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 48 | return data.count 49 | } 50 | func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 51 | let cell = tableView.dequeueReusableCell(withIdentifier: "DefaultCell") 52 | cell?.textLabel?.text = data[indexPath.row] 53 | return cell! 54 | } 55 | } 56 | 57 | // MARK: UITableViewDelegate 58 | extension FirstViewController: UITableViewDelegate { 59 | func scrollViewDidScroll(_ scrollView: UIScrollView) { 60 | // progress 怎么计算取决于你需求，这里的是为了把`tableview`当前可见区域最底部的2个数字给显示出来。 61 | let progress = Float((scrollView.contentOffset.y + tableView.bounds.height - tableView.rowHeight) / scrollView.contentSize.height) 62 | wheelView.progress = progress 63 | } 64 | } 65 | -------------------------------------------------------------------------------- /TabBarInteraction/TabbarInteractable.swift: -------------------------------------------------------------------------------- 1 | // 2 | // TabbarInteractable.swift 3 | // TabBarInteraction 4 | // 5 | // Created by potato04 on 2019/4/3. 6 | // Copyright © 2019 potato04. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | protocol TabbarInteractable { 12 | func replaceSwappableImageViews(with newView: UIView, and viewSize: CGSize) 13 | } 14 | 15 | extension TabbarInteractable where Self: UIViewController { 16 | func replaceSwappableImageViews(with newView: UIView, and viewSize: CGSize) { 17 | newView.isUserInteractionEnabled = false 18 | 19 | //find ViewController's nearest UITabBarController 20 | var parentController = self.parent 21 | while !(parentController is UITabBarController) { 22 | if parentController?.parent == nil { return } 23 | parentController = parentController?.parent 24 | } 25 | let tabbarController = parentController as! UITabBarController 26 | 27 | // using bfs to find ViewController's index in UITabBarController 28 | var controllerIndex = -1 29 | findControllerIndexLoop: for (i, child) in tabbarController.children.enumerated() { 30 | var queue = [child] 31 | while queue.count > 0 { 32 | let controller = queue.removeFirst() 33 | if controller is Self { 34 | controllerIndex = i 35 | break findControllerIndexLoop 36 | } 37 | for vc in controller.children { 38 | queue.append(vc) 39 | } 40 | } 41 | } 42 | if controllerIndex == -1 { return } 43 | 44 | var tabBarButtons = tabbarController.tabBar.subviews.filter({ 45 | type(of: $0).description().isEqual("UITabBarButton") 46 | }) 47 | 48 | guard !tabBarButtons.isEmpty else { return } 49 | 50 | let tabBarButton = tabBarButtons[controllerIndex] 51 | let swappableImageViews = tabBarButton.subviews.filter({ 52 | type(of: $0).description().isEqual("UITabBarSwappableImageView") 53 | }) 54 | guard !swappableImageViews.isEmpty else { return } 55 | let swappableImageView = swappableImageViews.first! 56 | tabBarButton.addSubview(newView) 57 | swappableImageView.isHidden = true 58 | NSLayoutConstraint.activate([ 59 | newView.widthAnchor.constraint(equalToConstant: viewSize.width), 60 | newView.heightAnchor.constraint(equalToConstant: viewSize.height), 61 | newView.centerXAnchor.constraint(equalTo: swappableImageView.centerXAnchor), 62 | newView.centerYAnchor.constraint(equalTo: swappableImageView.centerYAnchor) 63 | ]) 64 | } 65 | } 66 | -------------------------------------------------------------------------------- /TabBarInteraction/ClockView.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ClockView.swift 3 | // TabBarInteraction 4 | // 5 | // Created by potato04 on 2019/3/31. 6 | // Copyright © 2019 potato04. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | class ClockIconView: UIView { 12 | 13 | var hour: Int = 9 { 14 | didSet { 15 | hour = min(24, max(0, hour)) 16 | updateHourHandLayerPath() 17 | } 18 | } 19 | 20 | var minute: Int = 0 { 21 | didSet { 22 | minute = min(60, max(0, minute)) 23 | updateMinuteHandLayerPath() 24 | } 25 | } 26 | 27 | private let hourHandLayer = CAShapeLayer() 28 | private let minuteHandLayer = CAShapeLayer() 29 | 30 | var hourHandLength: CGFloat = 8 { 31 | didSet { 32 | updateHourHandLayerPath() 33 | } 34 | } 35 | var minuteHandLength: CGFloat = 10 { 36 | didSet { 37 | updateMinuteHandLayerPath() 38 | } 39 | } 40 | 41 | var lineWidth: CGFloat { 42 | get { 43 | return hourHandLayer.lineWidth 44 | } 45 | set { 46 | hourHandLayer.lineWidth = newValue 47 | minuteHandLayer.lineWidth = newValue 48 | updateHourHandLayerPath() 49 | updateMinuteHandLayerPath() 50 | } 51 | } 52 | 53 | override var tintColor: UIColor! { 54 | get { 55 | return UIColor(cgColor: hourHandLayer.strokeColor!) 56 | } 57 | set { 58 | hourHandLayer.strokeColor = newValue.cgColor 59 | minuteHandLayer.strokeColor = newValue.cgColor 60 | updateHourHandLayerPath() 61 | updateMinuteHandLayerPath() 62 | } 63 | } 64 | 65 | required init?(coder aDecoder: NSCoder) { 66 | super.init(coder: aDecoder) 67 | setupView() 68 | } 69 | override init(frame: CGRect) { 70 | super.init(frame: frame) 71 | setupView() 72 | } 73 | 74 | private func setupView() { 75 | translatesAutoresizingMaskIntoConstraints = false 76 | //updateBounds(bounds) 77 | 78 | hourHandLayer.lineCap = .round 79 | minuteHandLayer.lineCap = .round 80 | layer.addSublayer(hourHandLayer) 81 | layer.addSublayer(minuteHandLayer) 82 | } 83 | 84 | 85 | override func layoutSubviews() { 86 | updateBounds(bounds) 87 | } 88 | 89 | private func updateBounds(_ bounds: CGRect) { 90 | [hourHandLayer, minuteHandLayer].forEach { 91 | $0.bounds = bounds 92 | $0.position = CGPoint(x: bounds.midX, y: bounds.midY) 93 | } 94 | updateHourHandLayerPath() 95 | updateMinuteHandLayerPath() 96 | } 97 | 98 | private func updateHourHandLayerPath() { 99 | let hourHandLayerPath = UIBezierPath() 100 | let center = CGPoint(x: bounds.midX, y: bounds.midY) 101 | hourHandLayerPath.move(to: center) 102 | hourHandLayerPath.addLine(to: CGPoint(x: center.x, y: center.y - hourHandLength)) 103 | hourHandLayer.path = hourHandLayerPath.cgPath 104 | 105 | ///需要考虑分钟引起的时针偏移 106 | var radian = (2 * CGFloat.pi * CGFloat(hour)) / 12 107 | radian += (CGFloat(minute) / 60) * (2 * CGFloat.pi) / 12 108 | hourHandLayer.transform = CATransform3DMakeRotation(radian, 0, 0, 1) 109 | } 110 | 111 | private func updateMinuteHandLayerPath() { 112 | let minuteHandLayerPath = UIBezierPath() 113 | let center = CGPoint(x: bounds.midX, y: bounds.midY) 114 | //minuteHandLayerPath.move(to: center.applying(CGAffineTransform(translationX: 0, y: lineWidth / 2))) 115 | minuteHandLayerPath.move(to: center) 116 | minuteHandLayerPath.addLine(to: CGPoint(x: center.x, y: center.y - minuteHandLength)) 117 | minuteHandLayer.path = minuteHandLayerPath.cgPath 118 | minuteHandLayer.transform = CATransform3DMakeRotation((2 * CGFloat.pi * CGFloat(minute)) / 60 , 0, 0, 1) 119 | } 120 | } 121 | -------------------------------------------------------------------------------- /TabBarInteraction/WheelView.swift: -------------------------------------------------------------------------------- 1 | // 2 | // WheelView.swift 3 | // TabBarInteraction 4 | // 5 | // Created by potato04 on 2019/3/28. 6 | // Copyright © 2019 potato04. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | class WheelView: UIView { 12 | 13 | var progress: Float = 0.0 { 14 | didSet { 15 | progress = min(max(progress, 0.0), 1.0) 16 | guard !contents.isEmpty else { return } 17 | 18 | /** 根据 progress 和 contents 计算出上下两个 label 显示的内容以及 label 的压缩程度和位置 19 | * 20 | * Example: 21 | * progress = 0.4, contents = ["A","B","C","D"] 22 | * 23 | * 1）计算两个label显示的内容 24 | * topIndex = 4 * 0.4 = 1.6, topLabel.text = contents[1] = "B" 25 | * bottomIndex = 1.6 + 1 = 2.6, bottomLabel.text = contents[2] = "C" 26 | * 27 | * 2）计算两个label如何压缩和位置调整，这是实现滚轮效果的原理 28 | * indexOffset = 1.6 % 1 = 0.6 29 | * halfHeight = bounds.height / 2 30 | * 31 | * ┌─────────────┐ ┌─────────────┐ 32 | * |┌───────────┐| scaleY | | 33 | * || || 1-0.6=0.4 | | translationY 34 | * || topLabel || ----------> |┌─ topLabel─┐| ------------------┐ 35 | * || || |└───────────┘| -halfHeight * 0.6 | ┌─────────────┐ 36 | * |└───────────┘| | | | |┌─ toplabel─┐| 37 | * └─────────────┘ └─────────────┘ | |└───────────┘| 38 | * |--> |┌───────────┐| 39 | * ┌─────────────┐ ┌─────────────┐ | ||bottomLabel|| 40 | * |┌───────────┐| scaleY | | | |└───────────┘| 41 | * || || 0.6 |┌───────────┐| translationY | └─────────────┘ 42 | * ||bottomLabel|| ----------> ||bottomLabel|| ------------------┘ 43 | * || || |└───────────┘| halfHeight * 0.4 44 | * |└───────────┘| | | 45 | * └─────────────┘ └─────────────┘ 46 | * 47 | * 可以想象出，当 indexOffset 从 0..<1 过程中， 48 | * topLabel 从满视图越缩越小至0，而 bottomLabel 越放越大至满视图，即形成一次完整的滚动 49 | */ 50 | 51 | let topIndex = min(max(0.0, Float(contents.count) * progress), Float(contents.count - 1)) 52 | let bottomIndex = min(topIndex + 1, Float(contents.count - 1)) 53 | let indexOffset = topIndex.truncatingRemainder(dividingBy: 1) 54 | 55 | toplabel.text = contents[Int(topIndex)] 56 | toplabel.transform = CGAffineTransform(scaleX: 1.0, y: CGFloat(1 - indexOffset)) 57 | .concatenating(CGAffineTransform(translationX: 0, y: -(toplabel.bounds.height / 2) * CGFloat(indexOffset))) 58 | 59 | bottomLabel.text = contents[Int(bottomIndex)] 60 | bottomLabel.transform = CGAffineTransform(scaleX: 1.0, y: CGFloat(indexOffset)) 61 | .concatenating(CGAffineTransform(translationX: 0, y: (bottomLabel.bounds.height / 2) * (1 - CGFloat(indexOffset)))) 62 | } 63 | } 64 | 65 | var contents = [String]() 66 | 67 | private lazy var toplabel: UILabel = { 68 | return createDefaultLabel() 69 | }() 70 | 71 | private lazy var bottomLabel: UILabel = { 72 | return createDefaultLabel() 73 | }() 74 | 75 | private func createDefaultLabel() -> UILabel { 76 | let label = UILabel() 77 | label.textAlignment = NSTextAlignment.center 78 | label.adjustsFontSizeToFitWidth = true 79 | label.translatesAutoresizingMaskIntoConstraints = false 80 | return label 81 | } 82 | 83 | required init?(coder aDecoder: NSCoder) { 84 | super.init(coder: aDecoder) 85 | setupView() 86 | } 87 | override init(frame: CGRect) { 88 | super.init(frame: frame) 89 | setupView() 90 | } 91 | 92 | private func setupView() { 93 | translatesAutoresizingMaskIntoConstraints = false 94 | 95 | [toplabel, bottomLabel].forEach { 96 | addSubview($0) 97 | NSLayoutConstraint.activate([ 98 | $0.topAnchor.constraint(equalTo: layoutMarginsGuide.topAnchor), 99 | $0.bottomAnchor.constraint(equalTo: layoutMarginsGuide.bottomAnchor), 100 | $0.leftAnchor.constraint(equalTo: layoutMarginsGuide.leftAnchor), 101 | $0.rightAnchor.constraint(equalTo: layoutMarginsGuide.rightAnchor) 102 | ]) 103 | } 104 | } 105 | } 106 | 107 | 108 | extension WheelView { 109 | 110 | override func tintColorDidChange() { 111 | [toplabel, bottomLabel].forEach { 112 | $0.textColor = tintColor 113 | } 114 | layer.borderColor = tintColor.cgColor 115 | } 116 | 117 | override var backgroundColor: UIColor? { 118 | get { 119 | return toplabel.backgroundColor 120 | } 121 | set { 122 | [toplabel, bottomLabel].forEach { 123 | $0.backgroundColor = newValue 124 | } 125 | } 126 | } 127 | 128 | var borderWidth: CGFloat { 129 | get { 130 | return layer.borderWidth 131 | } 132 | set { 133 | layoutMargins = UIEdgeInsets(top: newValue, left: newValue, bottom: newValue, right: newValue) 134 | layer.borderWidth = newValue 135 | } 136 | } 137 | 138 | var font: UIFont { 139 | get { 140 | return toplabel.font 141 | } 142 | set { 143 | [toplabel, bottomLabel].forEach { 144 | $0.font = newValue 145 | } 146 | } 147 | } 148 | } 149 | -------------------------------------------------------------------------------- /TabBarInteraction/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 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 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