iOS開發——裝置篇Swift篇&判斷裝置類型

標籤：

判斷裝置類型
 1，分割視圖控制器（UISplitViewController）在iPhone應用中，使用導航控制器由上一層介面進入下一層介面。但iPad螢幕較大，通常使用SplitViewController來實現導航（這個是iPad專用的視圖控制器）。在橫屏下，左側顯示一個導航列表，點擊後右邊顯示對應的詳情。豎屏情況下顯示方式會有所不同，預設只顯示詳細面板，原來左側的導航列表會通過浮動視窗隱藏，需要從邊緣向內拖動來顯示。 2，開發相容的iOS應用有時候需要開發相容iPhone、iPod、iPad的應用，這時候需要判斷裝置類型，如果是iPhone、iPod就不應該使用SplitViewController。另外處理方式也會有變化，如點擊清單項目時，在iPad直接在右側展示詳情，而iPhone卻需要導航到詳細頁。iOS提供了UIDevice類來判斷裝置的類型，其userInterfaceIdiom屬性返回裝置類型枚舉 3，範例  iPhone：       iPad：   
 4，範例代碼
--- AppDelegate.swift 應用入口 ---

 1 import UIKit 2   3 @UIApplicationMain 4 class AppDelegate: UIResponder, UIApplicationDelegate { 5                               6     var window: UIWindow? 7   8     func application(application: UIApplication, 9         didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {10         self.window = UIWindow(frame: UIScreen.mainScreen().bounds)11         // Override point for customization after application launch.12         self.window!.backgroundColor = UIColor.whiteColor()13         self.window!.makeKeyAndVisible()14          15         //初始化列表面板16         let master = MasterViewController()17         //初始化詳情面板18         let detail = DetailViewController()19         //設定列表面板引用詳情面板，以便使用者點擊清單項目時調用詳情面板的相應方法20         master.detailViewController = detail21         //用導航封裝master列表，顯示導航條，如果是分割面板也不影響功能22         let nav = UINavigationController(rootViewController: master)23         // 如果是iPhone或iPod則只顯示列表頁，如果是iPad則顯示分割面板24         if (UIDevice.currentDevice().userInterfaceIdiom == .Phone) {25             self.window!.rootViewController = nav26         }27         else {28             //初始化分割面板29             let split = UISplitViewController()30             //設定分割面板的2個視圖控制器31             split.viewControllers = [nav, detail]32          33             //分割面板作為window的主視圖載入34             self.window!.rootViewController = split35         }36          37         return true38     }39  40     func applicationWillResignActive(application: UIApplication) {41     }42  43     func applicationDidEnterBackground(application: UIApplication) {44     }45  46     func applicationWillEnterForeground(application: UIApplication) {47     }48  49     func applicationDidBecomeActive(application: UIApplication) {50     }51  52     func applicationWillTerminate(application: UIApplication) {53     }54 }

 

--- MasterViewController.swift 列表頁 ---

 1 import UIKit 2   3 class MasterViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { 4       5     // 表格載入 6     var tableView:UITableView? 7     // 控制項類型 8     var ctrls = ["UILabel", "UIButton", "UIImageView", "UISlider"] 9     //10     var detailViewController:DetailViewController?11      12     override func viewDidLoad() {13         super.viewDidLoad()14         // Do any additional setup after loading the view, typically from a nib.15          16         self.title = "Swift控制項示範"17         self.tableView = UITableView(frame:self.view.frame, style:UITableViewStyle.Plain)18         self.tableView!.delegate = self19         self.tableView!.dataSource = self20         self.tableView!.registerClass(UITableViewCell.self, forCellReuseIdentifier: "SwiftCell")21         self.view.addSubview(self.tableView!)22     }23      24     override func didReceiveMemoryWarning() {25         super.didReceiveMemoryWarning()26         // Dispose of any resources that can be recreated.27     }28      29     // UITableViewDataSource協議方法30     func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int31     {32         return self.ctrls.count33     }34      35     // UITableViewDataSource協議方法36     func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath)37         -> UITableViewCell38     {39         let cell = tableView.dequeueReusableCellWithIdentifier("SwiftCell",40             forIndexPath: indexPath) as UITableViewCell41         cell.accessoryType = UITableViewCellAccessoryType.DisclosureIndicator42         cell.textLabel?.text = self.ctrls[indexPath.row]43          44         return cell45     }46      47     // UITableViewDelegate協議方法，點擊時調用48     func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!)49     {50         //調用DetailViewController的方法更新詳細頁51         detailViewController!.loadControl(self.ctrls[indexPath.row])52          53         //如果是iPhone、iPod則導航到詳情頁54         if (UIDevice.currentDevice().userInterfaceIdiom == .Phone) {55             // 跳轉到detailViewController，取消選中狀態56             //self.tableView!.deselectRowAtIndexPath(indexPath, animated: true)57          58             // navigationController跳轉到detailViewController59             self.navigationController!.pushViewController(detailViewController!, animated:true)60         }61     }62 }

 

--- DetailViewController.swift 詳情頁 ---

 1 import UIKit 2   3 class DetailViewController: UIViewController { 4       5     override func viewDidLoad() { 6         super.viewDidLoad() 7         // Do any additional setup after loading the view, typically from a nib. 8           9         self.view.backgroundColor = UIColor.whiteColor()10         let ctrl = self.title != nil ? self.title! : ""11         loadControl(ctrl)12     }13      14     override func didReceiveMemoryWarning() {15         super.didReceiveMemoryWarning()16         // Dispose of any resources that can be recreated.17     }18      19     func loadControl(ctrl:String) {20         clearViews()21         switch (ctrl) {22         case "UILabel":23             var label = UILabel(frame: self.view.bounds)24             label.backgroundColor = UIColor.clearColor()25             label.textAlignment = NSTextAlignment.Center26             label.font = UIFont.systemFontOfSize(36)27             label.text = "Hello, Hangge.com"28             self.view.addSubview(label)29         case "UIButton":30             var button = UIButton(frame: CGRectMake(110,120,100,60))31             button.backgroundColor = UIColor.blueColor()32             button.setTitleColor(UIColor.redColor(), forState: UIControlState.Normal)33             button.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Highlighted)34             button.setTitle("點擊我", forState: .Normal)35             self.view.addSubview(button)36         default:37             println("clicked: \(ctrl)")38         }39     }40      41     func clearViews() {42         for v in self.view.subviews {43             v.removeFromSuperview()44         }45     }    46 }

 

（注意：項目直接建立一個Master-Detail Application，就已經具有同上述一樣的相容iPhone、iPad的二級導航功能）

iOS開發——裝置篇Swift篇&判斷裝置類型