├── .gitignore ├── ACScrollNavBar.xcworkspace └── contents.xcworkspacedata ├── ACScrollNavBar ├── ACScrollNavBar.xcodeproj │ ├── project.pbxproj │ └── project.xcworkspace │ │ └── contents.xcworkspacedata ├── ACScrollNavBar │ ├── ACScrollNavBar.h │ ├── Info.plist │ ├── UINavigationBar+Scrollable.swift │ └── UIViewController+ScrollingNavbar.swift └── ACScrollNavBarTests │ ├── ACScrollNavBarTests.swift │ └── Info.plist ├── DemoApp ├── DemoApp.xcodeproj │ ├── project.pbxproj │ └── project.xcworkspace │ │ └── contents.xcworkspacedata ├── DemoApp │ ├── AppDelegate.swift │ ├── Base.lproj │ │ ├── LaunchScreen.xib │ │ └── Main.storyboard │ ├── Images.xcassets │ │ └── AppIcon.appiconset │ │ │ └── Contents.json │ ├── Info.plist │ └── RootViewController.swift └── DemoAppTests │ ├── DemoAppTests.swift │ └── Info.plist ├── LICENSE ├── README.md └── demo.gif /.gitignore: -------------------------------------------------------------------------------- 1 | # Xcode 2 | # 3 | build/ 4 | *.pbxuser 5 | !default.pbxuser 6 | *.mode1v3 7 | !default.mode1v3 8 | *.mode2v3 9 | !default.mode2v3 10 | *.perspectivev3 11 | !default.perspectivev3 12 | xcuserdata 13 | *.xccheckout 14 | *.moved-aside 15 | DerivedData 16 | *.hmap 17 | *.ipa 18 | *.xcuserstate 19 | 20 | # CocoaPods 21 | # 22 | # We recommend against adding the Pods directory to your .gitignore. 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406 | } 407 | -------------------------------------------------------------------------------- /ACScrollNavBar/ACScrollNavBar.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /ACScrollNavBar/ACScrollNavBar/ACScrollNavBar.h: -------------------------------------------------------------------------------- 1 | // 2 | // ACScrollNavBar.h 3 | // ACScrollNavBar 4 | // 5 | // Created by Alex Corre on 10/17/14. 6 | // Copyright (c) 2014 Alex Corre. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | //! Project version number for ACScrollNavBar. 12 | FOUNDATION_EXPORT double ACScrollNavBarVersionNumber; 13 | 14 | //! Project version string for ACScrollNavBar. 15 | FOUNDATION_EXPORT const unsigned char ACScrollNavBarVersionString[]; 16 | 17 | // In this header, you should import all the public headers of your framework using statements like #import 18 | 19 | 20 | -------------------------------------------------------------------------------- /ACScrollNavBar/ACScrollNavBar/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.alexcorre.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | FMWK 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | $(CURRENT_PROJECT_VERSION) 23 | NSPrincipalClass 24 | 25 | 26 | 27 | -------------------------------------------------------------------------------- /ACScrollNavBar/ACScrollNavBar/UINavigationBar+Scrollable.swift: -------------------------------------------------------------------------------- 1 | // 2 | // UINavigationBar+Scrollable.swift 3 | // ACScrollNavigationBarExample 4 | // 5 | // Created by Alex Corre on 10/17/14. 6 | // Copyright (c) 2014 Alex Corre. All rights reserved. 7 | // 8 | 9 | extension UINavigationBar { 10 | 11 | 12 | /// Resets this UINavigationBar to its natural position (not collapsed). 13 | /// 14 | /// :param: animated Whether or not to animate the change 15 | /// :param: scrollProvider A NavigationScrollProvider to be informed of the change 16 | public func scroll_nav_resetToDefaultPosition(animated: Bool, scrollProvider: NavigationScrollProvider) { 17 | var defaultFrame = frame 18 | defaultFrame.origin.y = scroll_nav_statusBarHeight() 19 | scroll_nav_setFrame(defaultFrame, alpha: 1.0, animated: animated, scrollProvider: scrollProvider) 20 | } 21 | 22 | 23 | /// Adjusts the frame of this UINavigation bar to the given frame, with a content alpha. 24 | /// 25 | /// :param: newFrame The frame to give this UINavigationBar 26 | /// :param: alpha The alpha of the content 27 | /// :param: animated Whether we should animate the frame / alpha change 28 | /// :param: scrollProvider The NavigationScrollProvider associated with this change being made. It will be adjusted accordingly. 29 | public func scroll_nav_setFrame(newFrame: CGRect, alpha: CGFloat, animated: Bool, scrollProvider: NavigationScrollProvider) { 30 | 31 | func moveFrame() { 32 | var offsetY = CGRectGetMinY(newFrame) - CGRectGetMinY(self.frame) 33 | 34 | // set all subviews alphas to desired alpha...except background view which is (always?) first subview 35 | for subview in self.subviews as [UIView] { 36 | var isBackgroundView = (subview === self.subviews[0]) 37 | var isViewHidden = subview.hidden || subview.alpha == 0.0 38 | 39 | if !(isBackgroundView || isViewHidden) { 40 | subview.alpha = alpha 41 | } 42 | } 43 | 44 | // move the navbar 45 | self.frame = newFrame 46 | 47 | // adjust scrollview contentInset 48 | scrollProvider.adjustScrollingViewInsets() 49 | } 50 | 51 | // Animate the moveFrame() changes if desired, otherwise just execute them 52 | if animated { 53 | UIView.animateWithDuration(0.2, animations: moveFrame) 54 | } else { 55 | moveFrame() 56 | } 57 | } 58 | 59 | 60 | /// Convenience getter for the height of the status bar frame. On iOS 7 takes into account the 61 | /// user interface orientation. On iOS 8 this is not necessary. 62 | public func scroll_nav_statusBarHeight() -> CGFloat { 63 | let application = UIApplication.sharedApplication() 64 | let orientation = application.statusBarOrientation 65 | let statusBarFrame = application.statusBarFrame 66 | 67 | let versions = UIDevice.currentDevice().systemVersion.componentsSeparatedByString(".") 68 | if versions[0] == "7" { 69 | // ios 7 code 70 | switch orientation { 71 | case UIInterfaceOrientation.Portrait, UIInterfaceOrientation.PortraitUpsideDown: 72 | return statusBarFrame.height 73 | case UIInterfaceOrientation.LandscapeLeft, UIInterfaceOrientation.LandscapeRight: 74 | return statusBarFrame.width 75 | default: 76 | return statusBarFrame.height 77 | } 78 | } else if versions[0] == "8" { 79 | // ios 8 code 80 | return statusBarFrame.height 81 | } else { 82 | return 20.0 83 | } 84 | } 85 | 86 | } 87 | -------------------------------------------------------------------------------- /ACScrollNavBar/ACScrollNavBar/UIViewController+ScrollingNavbar.swift: -------------------------------------------------------------------------------- 1 | // 2 | // UIViewController+ScrollingNavbar.swift 3 | // ACScrollNavigationBarExample 4 | // 5 | // Created by Alex Corre on 9/16/14. 6 | // Copyright (c) 2014 Alex Corre. All rights reserved. 7 | // 8 | 9 | let NearZero: CGFloat = 0.000001 10 | 11 | public enum NavigationScrollProviderScrollState: String { 12 | case None = "NONE" 13 | case ScrollingUp = "SCROLLING_UP" 14 | case ScrollingDown = "SCROLLING_DOWN" 15 | } 16 | 17 | @objc public protocol NavigationScrollProvider { 18 | var panGesture: UIPanGestureRecognizer { get set } 19 | var scrollState: String { get set } 20 | var gestureIsActive: Bool { get set } 21 | var lastContentOffsetY: CGFloat { get set } 22 | 23 | func navigationScrollingView() -> UIScrollView 24 | func adjustScrollingViewInsets() 25 | } 26 | 27 | extension UIViewController: UIGestureRecognizerDelegate { 28 | 29 | 30 | /// If this UIViewController instance implements the NavigationScrollProvider protocol, binds 31 | /// scrolling of the provided navigation scrolling view to the hiding / showing of the navigation 32 | /// bar. 33 | /// 34 | /// If this instance does not implement the NavigationScrollProvider protocol, or is not 35 | /// contained in a UINavigationController, this method is a noop. 36 | public func bindNavigationScrolling() { 37 | if let scrollProvider = self as? NavigationScrollProvider { 38 | if navigationController == nil { 39 | return 40 | } 41 | 42 | // here we know this UIViewController instance implements NavigationScrollProvider 43 | // and is contained in a UINavigationController 44 | var panGesture = UIPanGestureRecognizer(target: self, action: "handlePan:") 45 | panGesture.delegate = self 46 | selfAsScrollProvider().panGesture = panGesture 47 | 48 | // bind to notifications 49 | bindNotifications() 50 | 51 | // clean the panGesture and add it to the newly set scrollView 52 | selfAsScrollProvider().navigationScrollingView().addGestureRecognizer(panGesture) 53 | } else { 54 | return 55 | } 56 | } 57 | 58 | 59 | /// If this UIViewController instance implements the NavigationScrollProvider protocol and is 60 | /// contained within a UINavigationController, will reset the UINavigationBar position. 61 | public func resetNavBarPosition() { 62 | if navigationController == nil { 63 | return 64 | } 65 | 66 | if let scrollProvider = self as? NavigationScrollProvider { 67 | navigationController!.navigationBar.scroll_nav_resetToDefaultPosition(true, scrollProvider: scrollProvider) 68 | } 69 | 70 | } 71 | 72 | // MARK: - Pan Gesture Handling 73 | 74 | public func handlePan(gesture: UIPanGestureRecognizer) { 75 | let scrollProvider = selfAsScrollProvider() 76 | let myScrollView = scrollProvider.navigationScrollingView() 77 | 78 | // return if the gesture is not attached to our scroll view 79 | if gesture.view !== myScrollView { 80 | return 81 | } 82 | 83 | if myScrollView.frame.size.height + (navigationController!.navigationBar.bounds.size.height * 2) >= myScrollView.contentSize.height { 84 | return 85 | } 86 | 87 | let contentOffsetY = myScrollView.contentOffset.y 88 | 89 | // Do nothing if we are scrolling the contentInset (padding) 90 | if contentOffsetY < -myScrollView.contentInset.top { 91 | return 92 | } 93 | 94 | // if the gesture just started...reset the state and store the last offset 95 | if gesture.state == .Began { 96 | scrollProvider.scrollState = NavigationScrollProviderScrollState.None.rawValue 97 | scrollProvider.lastContentOffsetY = contentOffsetY 98 | scrollProvider.gestureIsActive = true 99 | return 100 | } 101 | 102 | var deltaY = contentOffsetY - scrollProvider.lastContentOffsetY 103 | if deltaY < 0.0 { 104 | scrollProvider.scrollState = NavigationScrollProviderScrollState.ScrollingDown.rawValue 105 | } else if deltaY > 0.0 { 106 | scrollProvider.scrollState = NavigationScrollProviderScrollState.ScrollingUp.rawValue 107 | } 108 | 109 | var newFrame = navigationController!.navigationBar.frame 110 | var alpha: CGFloat = 1.0 111 | var statusBarHeight = navigationController!.navigationBar.scroll_nav_statusBarHeight() 112 | var maxY = statusBarHeight 113 | var minY = maxY - CGRectGetHeight(newFrame) + 1.0 114 | 115 | let isScrolling = scrollProvider.scrollState == NavigationScrollProviderScrollState.ScrollingUp.rawValue || scrollProvider.scrollState == NavigationScrollProviderScrollState.ScrollingDown.rawValue 116 | scrollProvider.gestureIsActive = gesture.state != .Ended && gesture.state != .Cancelled 117 | 118 | if isScrolling && !scrollProvider.gestureIsActive { 119 | var contentOffsetYDelta: CGFloat = 0.0 120 | if scrollProvider.scrollState == NavigationScrollProviderScrollState.ScrollingDown.rawValue { 121 | contentOffsetYDelta = maxY - newFrame.origin.y 122 | newFrame.origin.y = maxY 123 | alpha = 1.0 124 | } 125 | else if scrollProvider.scrollState == NavigationScrollProviderScrollState.ScrollingUp.rawValue { 126 | contentOffsetYDelta = minY - newFrame.origin.y 127 | newFrame.origin.y = minY 128 | alpha = NearZero 129 | } 130 | 131 | navigationController!.navigationBar.scroll_nav_setFrame(newFrame, alpha: alpha, animated: true, scrollProvider: scrollProvider) 132 | 133 | if !myScrollView.decelerating { 134 | var newContentOffset = CGPointMake(myScrollView.contentOffset.x, contentOffsetY - contentOffsetYDelta) 135 | myScrollView.setContentOffset(newContentOffset, animated: true) 136 | } 137 | 138 | } else { 139 | newFrame.origin.y -= deltaY; 140 | newFrame.origin.y = min(maxY, max(newFrame.origin.y, minY)) 141 | 142 | alpha = (newFrame.origin.y - (minY + statusBarHeight)) / (maxY - (minY + statusBarHeight)) 143 | alpha = max(NearZero, alpha); 144 | 145 | navigationController!.navigationBar.scroll_nav_setFrame(newFrame, alpha: alpha, animated: false, scrollProvider: scrollProvider) 146 | } 147 | 148 | scrollProvider.lastContentOffsetY = contentOffsetY 149 | } 150 | 151 | // MARK: - NavigationScrollProvider 152 | 153 | public func adjustScrollingViewInsets() { 154 | let scrollProvider = selfAsScrollProvider() 155 | var scrollView = scrollProvider.navigationScrollingView() 156 | 157 | if scrollView.contentInset.top == 0 && scrollView.contentOffset.y == 0 { 158 | return 159 | } 160 | 161 | var insets = scrollView.contentInset 162 | insets.top = navigationController!.navigationBar.frame.origin.y + navigationController!.navigationBar.frame.size.height 163 | scrollView.contentInset = insets 164 | 165 | let isAtTop = !scrollProvider.gestureIsActive && scrollView.contentOffset.y <= 0 166 | if isAtTop && scrollView.contentOffset.y != scrollView.contentInset.top { 167 | let newContentOffset = CGPointMake(scrollView.contentOffset.x, -scrollView.contentInset.top) 168 | scrollView.setContentOffset(newContentOffset, animated: false) 169 | } 170 | } 171 | 172 | // MARK: - UIGestureRecognizerDelegate 173 | 174 | public func gestureRecognizer(gestureRecognizer: UIGestureRecognizer!, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer!) -> Bool { 175 | return true 176 | } 177 | 178 | // MARK: - Notifications 179 | 180 | private func bindNotifications() { 181 | NSNotificationCenter.defaultCenter().addObserver(self, selector: "statusBarOrientationDidChange", name: UIApplicationDidChangeStatusBarOrientationNotification, object: nil) 182 | NSNotificationCenter.defaultCenter().addObserver(self, selector: "applicationDidBecomeActive", name: UIApplicationDidBecomeActiveNotification, object: nil) 183 | } 184 | 185 | private func unbindNotifications() { 186 | NSNotificationCenter.defaultCenter().removeObserver(self, name: UIApplicationDidChangeStatusBarOrientationNotification, object: nil) 187 | NSNotificationCenter.defaultCenter().removeObserver(self, name: UIApplicationDidBecomeActiveNotification, object: nil) 188 | } 189 | 190 | public func statusBarOrientationDidChange() { 191 | selfAsScrollProvider().scrollState = NavigationScrollProviderScrollState.None.rawValue 192 | navigationController!.navigationBar.scroll_nav_resetToDefaultPosition(false, scrollProvider: selfAsScrollProvider()) 193 | } 194 | 195 | public func applicationDidBecomeActive() { 196 | selfAsScrollProvider().scrollState = NavigationScrollProviderScrollState.None.rawValue 197 | navigationController!.navigationBar.scroll_nav_resetToDefaultPosition(false, scrollProvider: selfAsScrollProvider()) 198 | } 199 | 200 | // MARK: - Helpers 201 | 202 | /** 203 | Helper for getting self as a NavigationScrollProvider. This will crash if its called 204 | by a non-conformer. Should only be called from bindNavigationScrolling() which ensures 205 | this cast will succeed. 206 | */ 207 | private func selfAsScrollProvider() -> NavigationScrollProvider { 208 | return self as NavigationScrollProvider 209 | } 210 | 211 | } -------------------------------------------------------------------------------- /ACScrollNavBar/ACScrollNavBarTests/ACScrollNavBarTests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ACScrollNavBarTests.swift 3 | // ACScrollNavBarTests 4 | // 5 | // Created by Alex Corre on 10/17/14. 6 | // Copyright (c) 2014 Alex Corre. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | import XCTest 11 | 12 | class ACScrollNavBarTests: XCTestCase { 13 | 14 | override func setUp() { 15 | super.setUp() 16 | // Put setup code here. This method is called before the invocation of each test method in the class. 17 | } 18 | 19 | override func tearDown() { 20 | // Put teardown code here. This method is called after the invocation of each test method in the class. 21 | super.tearDown() 22 | } 23 | 24 | func testExample() { 25 | // This is an example of a functional test case. 26 | XCTAssert(true, "Pass") 27 | } 28 | 29 | func testPerformanceExample() { 30 | // This is an example of a performance test case. 31 | self.measureBlock() { 32 | // Put the code you want to measure the time of here. 33 | } 34 | } 35 | 36 | } 37 | -------------------------------------------------------------------------------- /ACScrollNavBar/ACScrollNavBarTests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.alexcorre.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | BNDL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | 24 | 25 | -------------------------------------------------------------------------------- /DemoApp/DemoApp.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 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520 | defaultConfigurationIsVisible = 0; 521 | defaultConfigurationName = Release; 522 | }; 523 | /* End XCConfigurationList section */ 524 | }; 525 | rootObject = BD9A5B0D19F1D65400C1F777 /* Project object */; 526 | } 527 | -------------------------------------------------------------------------------- /DemoApp/DemoApp.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /DemoApp/DemoApp/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.swift 3 | // DemoApp 4 | // 5 | // Created by Alex Corre on 10/17/14. 6 | // Copyright (c) 2014 Alex Corre. 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: [NSObject: AnyObject]?) -> 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 throttle down OpenGL ES frame rates. 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 inactive 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 | -------------------------------------------------------------------------------- /DemoApp/DemoApp/Base.lproj/LaunchScreen.xib: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 20 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | -------------------------------------------------------------------------------- /DemoApp/DemoApp/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 | -------------------------------------------------------------------------------- /DemoApp/DemoApp/Images.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "size" : "29x29", 6 | "scale" : "2x" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "size" : "29x29", 11 | "scale" : "3x" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "size" : "40x40", 16 | "scale" : "2x" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "size" : "40x40", 21 | "scale" : "3x" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "size" : "60x60", 26 | "scale" : "2x" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "size" : "60x60", 31 | "scale" : "3x" 32 | } 33 | ], 34 | "info" : { 35 | "version" : 1, 36 | "author" : "xcode" 37 | } 38 | } -------------------------------------------------------------------------------- /DemoApp/DemoApp/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.alexcorre.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | LSRequiresIPhoneOS 24 | 25 | UILaunchStoryboardName 26 | LaunchScreen 27 | UIMainStoryboardFile 28 | Main 29 | UIRequiredDeviceCapabilities 30 | 31 | armv7 32 | 33 | UISupportedInterfaceOrientations 34 | 35 | UIInterfaceOrientationPortrait 36 | UIInterfaceOrientationLandscapeLeft 37 | UIInterfaceOrientationLandscapeRight 38 | 39 | 40 | 41 | -------------------------------------------------------------------------------- /DemoApp/DemoApp/RootViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.swift 3 | // DemoApp 4 | // 5 | // Created by Alex Corre on 10/17/14. 6 | // Copyright (c) 2014 Alex Corre. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | import ACScrollNavBar 11 | 12 | class RootViewController: UITableViewController { 13 | 14 | // MARK: - NavigationScrollProvider Stored Properties 15 | 16 | private var _panGesture: UIPanGestureRecognizer! 17 | private var _scrollState: String! 18 | private var _gestureIsActive = false 19 | private var _lastContentOffsetY: CGFloat = 0.0 20 | 21 | // MARK: - View LifeCycle 22 | 23 | override func viewDidLoad() { 24 | super.viewDidLoad() 25 | registerCells() 26 | 27 | // ACTIVATE Nav bar scrolling 28 | bindNavigationScrolling() 29 | } 30 | 31 | 32 | // MARK: - Setup 33 | 34 | func registerCells() { 35 | tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell") 36 | } 37 | 38 | } 39 | 40 | // MARK: - UITableViewDataSource 41 | 42 | extension RootViewController { 43 | 44 | override func numberOfSectionsInTableView(tableView: UITableView?) -> Int { 45 | return 1 46 | } 47 | 48 | override func tableView(tableView: UITableView?, numberOfRowsInSection section: Int) -> Int { 49 | return 100 50 | } 51 | 52 | override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 53 | let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell 54 | var row = indexPath.row 55 | cell.textLabel?.text = String(row) 56 | 57 | return cell 58 | } 59 | 60 | } 61 | 62 | // MARK: - UIScrollViewDelegate Override 63 | 64 | extension RootViewController { 65 | 66 | override func scrollViewDidScrollToTop(scrollView: UIScrollView) { 67 | // Ensure that nav bar is reset when we scroll to the top programatically. 68 | resetNavBarPosition() 69 | } 70 | 71 | } 72 | 73 | // MARK: - NavigationScrollProvider 74 | 75 | extension RootViewController: NavigationScrollProvider { 76 | 77 | var panGesture: UIPanGestureRecognizer { 78 | get { return _panGesture } 79 | set { _panGesture = newValue } 80 | } 81 | 82 | var scrollState: String { 83 | get { return _scrollState } 84 | set { _scrollState = newValue } 85 | } 86 | 87 | var gestureIsActive: Bool { 88 | get { return _gestureIsActive } 89 | set { _gestureIsActive = newValue } 90 | } 91 | 92 | var lastContentOffsetY: CGFloat { 93 | get { return _lastContentOffsetY } 94 | set { _lastContentOffsetY = newValue } 95 | } 96 | 97 | func navigationScrollingView() -> UIScrollView { 98 | return tableView 99 | } 100 | 101 | } 102 | 103 | -------------------------------------------------------------------------------- /DemoApp/DemoAppTests/DemoAppTests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // DemoAppTests.swift 3 | // DemoAppTests 4 | // 5 | // Created by Alex Corre on 10/17/14. 6 | // Copyright (c) 2014 Alex Corre. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | import XCTest 11 | 12 | class DemoAppTests: XCTestCase { 13 | 14 | override func setUp() { 15 | super.setUp() 16 | // Put setup code here. This method is called before the invocation of each test method in the class. 17 | } 18 | 19 | override func tearDown() { 20 | // Put teardown code here. This method is called after the invocation of each test method in the class. 21 | super.tearDown() 22 | } 23 | 24 | func testExample() { 25 | // This is an example of a functional test case. 26 | XCTAssert(true, "Pass") 27 | } 28 | 29 | func testPerformanceExample() { 30 | // This is an example of a performance test case. 31 | self.measureBlock() { 32 | // Put the code you want to measure the time of here. 33 | } 34 | } 35 | 36 | } 37 | -------------------------------------------------------------------------------- /DemoApp/DemoAppTests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.alexcorre.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | BNDL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | 24 | 25 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2014 Alex Corre 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 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | #ACScrollNavigationBar (swift) 2 | 3 | > A scrollable UINavigationBar that follows a UIScrollView. 4 | 5 | ![](https://raw.githubusercontent.com/alexcorre/ACScrollNavigationBar/master/demo.gif) 6 | 7 | ## Overview 8 | 9 | This project is very much in beta and experimental. It was originally based on [GTScrollNavigationBar](https://github.com/luugiathuy/GTScrollNavigationBar) and shared the same API. 10 | 11 | Now, the API and implementation have changed drastically to make it easier to use in swift. Instead of having a subclass of UINavigationBar, we now are able to bring in scrollable nav functionality through two class extensions. 12 | - `UINavigationBar+Scrollable.swift` 13 | - `UIViewController+ScrollingNavBar.swift` 14 | 15 | ## Installation 16 | 17 | ### Manually 18 | For now, until CocoaPods gets swift support, add the `ACScrollNavBar` project as a subproject of your app. The ACScrollNavBar project creates a Framework. Add this framework to your apps build phases under "Target Dependencies". Also add the ACScrollNavBar framework to your project as in the "Embedded Binaries" section in General settings for the app project. After this you should be able to do an import ACScrollNavBar successfully in your app project. 19 | 20 | Check out `ACScrollNavBar.xcworkspace` for an example. 21 | 22 | ## Usage 23 | 24 | Setup the your UIViewController to implement the `NavigationScrollProvider` protocol. See example project for details. 25 | 26 | ```swift 27 | extension SampleTableViewController: NavigationScrollProvider { 28 | 29 | var panGesture: UIPanGestureRecognizer { 30 | get { return _panGesture } 31 | set { _panGesture = newValue } 32 | } 33 | 34 | var scrollState: String { 35 | get { return _scrollState } 36 | set { _scrollState = newValue } 37 | } 38 | 39 | var gestureIsActive: Bool { 40 | get { return _gestureIsActive } 41 | set { _gestureIsActive = newValue } 42 | } 43 | 44 | var lastContentOffsetY: CGFloat { 45 | get { return _lastContentOffsetY } 46 | set { _lastContentOffsetY = newValue } 47 | } 48 | 49 | func navigationScrollingView() -> UIScrollView { 50 | return tableView 51 | } 52 | 53 | } 54 | 55 | ``` 56 | 57 | Note that you'll need to add some private instance properties to your view controller. This is required since the library is based on class extensions and thus cannot add stored properties to a class. 58 | 59 | ```swift 60 | class MyTableViewController: UITableViewController { 61 | 62 | // MARK: - NavigationScrollProvider Stored Properties 63 | 64 | private var _panGesture: UIPanGestureRecognizer! 65 | private var _scrollState: String! 66 | private var _gestureIsActive = false 67 | private var _lastContentOffsetY: CGFloat = 0.0 68 | 69 | } 70 | ``` 71 | 72 | Once your UIViewController is implementing the NavigationScrollProvider protocol, you can simple call `bindNavigationScrolling()` on `viewDidLoad()`. If you are not inside a `UINavigationController` or dont implement the `NavigationScrollProvider` protocol, this call will do nothing. 73 | 74 | ```swift 75 | 76 | class MyTableViewController: UITableViewController { 77 | 78 | func viewDidLoad() { 79 | super.viewDidLoad() 80 | bindNavigationScrolling() 81 | } 82 | 83 | } 84 | 85 | ``` 86 | 87 | If desired, implement `scrollViewDidScrollToTop(scrollView: UIScrollView!)` in your `UIScrollView's` delegate to reset the navigation bar. 88 | 89 | ```swift 90 | func scrollViewDidScrollToTop(scrollView: UIScrollView) { 91 | resetNavBarPosition() 92 | } 93 | 94 | ``` 95 | 96 | Thats it... 97 | 98 | ## Contact 99 | - for questions please open an issue 100 | - twitter: [@alexcorre](http://twitter.com/alexcorre) 101 | -------------------------------------------------------------------------------- /demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/alexcorre/ACScrollNavigationBar/498a63aa68682f0c46a0dfddd66726ce92af3502/demo.gif --------------------------------------------------------------------------------