AirPlay 與雙螢幕援 Johnny Sung 2013.10.17 @ CocoaHeads Taipei Friday, October 18, 13
AirPlay 與雙螢幕⽀支援Johnny Sung
2013.10.17 @ CocoaHeads Taipei
Friday, October 18, 13
Friday, October 18, 13
Friday, October 18, 13
Apple TV• Lightning Digital AV Adapter• Lightning to VGA Adapter• Apple 30-pin Digital AV Adapter• Apple 30-pin to VGA Adapter
Friday, October 18, 13
Friday, October 18, 13
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}
這是我們常常在AppDelegate看到的句⼦子
Friday, October 18, 13
剛剛在didFinishLaunchingWithOptions做了...
• ⽤用UIScreen的⼤大⼩小,來建⽴立 UIWindow
• 宣告⼀一個ViewController
• 指定rootViewController
• 讓此Window提到最前,並且可被看⾒見
Friday, October 18, 13
UIScreen
UIWindow
UIViewController
Friday, October 18, 13
螢幕數量變動的時機
⼿手機螢幕
⼿手機螢幕
第⼆二螢幕
第⼆二螢幕
didFinishLaunchingWithOptions
UIScreenDidConnectNotification
• APP執⾏行中,連接螢幕
• APP剛開啓時
Friday, October 18, 13
我們要做的
• APP啓動時
• 檢查⺫⽬目前螢幕的數量註冊螢幕 連接/斷開 的notification
• 將對應的UIWindow設定好
• 收到螢幕連接的notification時
• 建⽴立對應的UIWindow並且設定
Friday, October 18, 13
NSArray* screens = [UIScreen screens];for (UIScreen *screen in screens){ if (screen == [UIScreen mainScreen]) { self.window = [[UIWindow alloc] initWithFrame:[screen bounds]]; [self.window setScreen:screen]; ViewControllerA* vcA=[ViewControllerA alloc] initWithNibName:@"xibA" bundle:nil]; self.window.rootViewController = vcA; [self.window makeKeyAndVisible]; } else { self.window2 = [[UIWindow alloc] initWithFrame:[screen bounds]]; [self.window2 setScreen:screen]; ViewControllerB* vcB=[ViewControllerB alloc] initWithNibName:@"xibB" bundle:nil]; self.window2.rootViewController = vcB; self.window2.hidden=NO; }}
根據UIScreen設定對應的UIWindow
Friday, October 18, 13
註冊螢幕 連接/斷開 的notification (1/2)
在 application:didFinishLaunchingWithOptions: 裡
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(screenDidConnect:) name:UIScreenDidConnectNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(screenDidDisconnect:) name:UIScreenDidDisconnectNotification object:nil];APP關閉時,記得解除註冊
在 applicationWillTerminate: 裡
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIScreenDidConnectNotification object:nil]; [[NSNotificationCenter defaultCenter] removeObserver:self name:UIScreenDidDisconnectNotification object:nil];
Friday, October 18, 13
註冊螢幕 連接/斷開 的notification (2/2)
- (void) screenDidConnect:(NSNotification *) notification{ UIScreen* screen = [notification object]; // 建⽴立UIWindow ...
}
Friday, October 18, 13
使⽤用雙螢幕之後
• 偵測第⼆二螢幕的解析度,並調整UI樣式
• 第⼆二螢幕的控制與溝通
Friday, October 18, 13
取得ViewController⺫⽬目前的解析度
在 viewDidLoad 裡
CGRect screenRect = [[[[self view] window] screen] bounds];CGFloat screenWidth = screenRect.size.width;CGFloat screenHeight = screenRect.size.height;NSLog(@"Screen: %.0f x %.0f", screenWidth, screenHeight);
Friday, October 18, 13
Example:
https://github.com/j796160836/AirplayDemoTest
Ref.
• AirplayDemo
https://github.com/quellish/AirplayDemo
• ExternalDisplay
https://developer.apple.com/library/ios/samplecode/ExternalDisplay/Introduction/Intro.html
Friday, October 18, 13
Reference
• Using Windows to Present Content on Multiple Displayshttps://developer.apple.com/library/ios/documentation/WindowsViews/Conceptual/WindowAndScreenGuide/Introduction/Introduction.html
• Understanding Windows and Screenshttps://developer.apple.com/library/ios/documentation/WindowsViews/Conceptual/WindowAndScreenGuide/WindowScreenRolesinApp/WindowScreenRolesinApp.html
• Presenting Content on an External Displayhttps://developer.apple.com/library/ios/documentation/WindowsViews/Conceptual/WindowAndScreenGuide/UsingExternalDisplay/UsingExternalDisplay.html#//apple_ref/doc/uid/TP40012555-CH3-SW1
• UIScreen Class Referencehttps://developer.apple.com/library/ios/documentation/uikit/reference/UIScreen_Class/Reference/UIScreen.html
• UIWindow Class Referencehttps://developer.apple.com/library/ios/documentation/uikit/reference/UIWindow_Class/UIWindowClassReference/UIWindowClassReference.html
Friday, October 18, 13
Q & A
Friday, October 18, 13
螢幕鏡射與否?
• 啓動雙螢幕(與⼿手機螢幕獨⽴立)[self.window2 setScreen:screen];
self.window2.hidden=NO;
• 使⽤用鏡射(與⼿手機螢幕相同)[self.window2 setScreen:nil];
self.window2.hidden=YES;
Friday, October 18, 13
將self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
換成UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle: nil];
self.viewController = [mainStoryboard instantiateViewControllerWithIdentifier:@"ViewController"];
使⽤用 StoryBoard ?
Friday, October 18, 13
腦筋急轉彎
試問
• [UIScreen mainScreen].bounds
• [UIApplcation sharedApplication].keyWindow.bounds
的差異?
http://stackoverflow.com/questions/17465547/uiscreen-mainscreen-bounds-vs-uiapplcation-sharedapplication-keywindow-bound
Friday, October 18, 13