Swift - 判断设备类型开发兼容的iOS应用(iPad使用分隔视图控制器)
1,分割视图控制器(UISplitViewController)

4,样例代码
--- AppDelegate.swift 应用入口 ---
--- MasterViewController.swift 列表页 ---
--- DetailViewController.swift 详情页 ---
在iPhone应用中,使用导航控制器由上一层界面进入下一层界面。
但iPad屏幕较大,通常使用SplitViewController来实现导航(这个是iPad专用的视图控制器)。在横屏下,左侧显示一个导航列表,点击后右边显示对应的详情。竖屏情况下显示方式会有所不同,默认只显示详细面板,原来左侧的导航列表会通过浮动窗口隐藏,需要从边缘向内拖动来显示。
2,开发兼容的iOS应用
有时候需要开发兼容iPhone、iPod、iPad的应用,这时候需要判断设备类型,如果是iPhone、iPod就不应该使用SplitViewController。另外处理方式也会有变化,如点击列表项时,在iPad直接在右侧展示详情,而iPhone却需要导航到详细页。
iOS提供了UIDevice类来判断设备的类型,其userInterfaceIdiom属性返回设备类型枚举
3,样例效果图
iPhone:


iPad:(注:iPad要旋转成横屏,竖屏下一片空白)

--- AppDelegate.swift 应用入口 ---
import UIKit @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate { var window: UIWindow? func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { self.window = UIWindow(frame: UIScreen.mainScreen().bounds) // Override point for customization after application launch. self.window!.backgroundColor = UIColor.whiteColor() self.window!.makeKeyAndVisible() //初始化列表面板 let master = MasterViewController() //初始化详情面板 let detail = DetailViewController() //设置列表面板引用详情面板,以便用户点击列表项时调用详情面板的相应方法 master.detailViewController = detail //用导航包装master列表,显示导航条,如果是分割面板也不影响功能 let nav = UINavigationController(rootViewController: master) // 如果是iPhone或iPod则只显示列表页,如果是iPad则显示分割面板 if (UIDevice.currentDevice().userInterfaceIdiom == .Phone) { self.window!.rootViewController = nav } else { //初始化分割面板 let split = UISplitViewController() //设置分割面板的2个视图控制器 split.viewControllers = [nav, detail] //分割面板作为window的主视图加载 self.window!.rootViewController = split } return true } func applicationWillResignActive(application: UIApplication) { } func applicationDidEnterBackground(application: UIApplication) { } func applicationWillEnterForeground(application: UIApplication) { } func applicationDidBecomeActive(application: UIApplication) { } func applicationWillTerminate(application: UIApplication) { } }
--- MasterViewController.swift 列表页 ---
import UIKit class MasterViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { // 表格加载 var tableView:UITableView? // 控件类型 var ctrls = ["UILabel", "UIButton", "UIImageView", "UISlider"] // var detailViewController:DetailViewController? override func viewDidLoad() { super.viewDidLoad() self.title = "Swift控件演示" self.tableView = UITableView(frame:self.view.frame, style:UITableViewStyle.Plain) self.tableView!.delegate = self self.tableView!.dataSource = self self.tableView!.registerClass(UITableViewCell.self, forCellReuseIdentifier: "SwiftCell") self.view.addSubview(self.tableView!) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } // UITableViewDataSource协议方法 func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return self.ctrls.count } // UITableViewDataSource协议方法 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCellWithIdentifier("SwiftCell", forIndexPath: indexPath) cell.accessoryType = UITableViewCellAccessoryType.DisclosureIndicator cell.textLabel?.text = self.ctrls[indexPath.row] return cell } // UITableViewDelegate协议方法,点击时调用 func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { //调用DetailViewController的方法更新详细页 detailViewController!.loadControl(self.ctrls[indexPath.row]) //如果是iPhone、iPod则导航到详情页 if (UIDevice.currentDevice().userInterfaceIdiom == .Phone) { // 跳转到detailViewController,取消选中状态 //self.tableView!.deselectRowAtIndexPath(indexPath, animated: true) // navigationController跳转到detailViewController self.navigationController!.pushViewController(detailViewController!, animated:true) } } }
--- DetailViewController.swift 详情页 ---
import UIKit class DetailViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() self.view.backgroundColor = UIColor.whiteColor() let ctrl = self.title != nil ? self.title! : "" loadControl(ctrl) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() } func loadControl(ctrl:String) { clearViews() switch (ctrl) { case "UILabel": let label = UILabel(frame: self.view.bounds) label.backgroundColor = UIColor.clearColor() label.textAlignment = NSTextAlignment.Center label.font = UIFont.systemFontOfSize(36) label.text = "Hello, Hangge.com" self.view.addSubview(label) case "UIButton": let button = UIButton(frame: CGRectMake(110,120,100,60)) button.backgroundColor = UIColor.blueColor() button.setTitleColor(UIColor.redColor(), forState: UIControlState.Normal) button.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Highlighted) button.setTitle("点击我", forState: .Normal) self.view.addSubview(button) default: print("clicked: \(ctrl)") } } func clearViews() { for v in self.view.subviews { v.removeFromSuperview() } } }(注意:项目直接新建一个Master-Detail Application,就已经具有同上述一样的兼容iPhone、iPad的二级导航功能)
能发下源码吗
ipad不显示分隔视图