UIApplication详解

每个app有且只有一个UIApplication对象，当程序启动的时候通过调用UIApplicationMain方法得到的。可以通过sharedApplication方法得到。

UIApplication对象的主要任务是处理用户事件的处理路径，例如分发一个UIEvent到另外一个对象去处理。UIApplication对象持有众多的UIWindow对象，因此可以组织app的展示。UIApplication对象还能处理一些资源，例如通过openURL:打开邮箱客户端或者设置界面等。

获得UIApplication对象

 

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1.[UIApplication sharedApplication]

获得UIApplicationDelegate对象

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1.[[UIApplication sharedApplication] delegate]

获得UIWindow对象

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1.[[UIApplication sharedApplication] windows];   //UIWindow数组

2.[[UIApplication sharedApplication] keyWindow]; //UIWindow数组中最后调用makeKeyAndVisible方法的UIWindow对象

控制和处理UIEvent

 

 

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1.- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

2.{//分发一个event到另外一个对象去处理

3.[[UIApplication sharedApplication] sendAction:@selector(action: forEvent:) to:[CustomHandler sharedCustomHandler] from:self forEvent:event];

4.}

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1.[[UIApplication sharedApplication] beginIgnoringInteractionEvents]; //开始忽略Event

2.//...中间调用动画等操作

3.[[UIApplication sharedApplication] endIgnoringInteractionEvents];   //结束忽略Event

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1.[UIApplication sharedApplication].applicationSupportsShakeToEdit = YES;  //晃动是否有撤销或者重做动作

打开URL资源

 

 

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1.[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];//打开设置界面

配置通知设置

 

 

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1.UIUserNotificationType  types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;

2.UIUserNotificationSettings  *mySettings  = [UIUserNotificationSettings settingsForTypes:types categories:nil];

3.[[UIApplication sharedApplication] registerUserNotificationSettings:mySettings]; //注册远程推送通知

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1.[[UIApplication sharedApplication] registerForRemoteNotifications];//注册

2.[[UIApplication sharedApplication] unregisterForRemoteNotifications];//注销

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01.NSDate *date = [NSDate dateWithTimeIntervalSinceNow:10];

02.UILocalNotification *localNotif = [[UILocalNotification alloc] init];

03.localNotif.fireDate = date;  //时间

04.localNotif.timeZone = [NSTimeZone localTimeZone]; //时区

05.localNotif.repeatInterval = NSCalendarUnitMinute; //间隔

06.localNotif.soundName = UILocalNotificationDefaultSoundName; //声音

07.localNotif.alertBody = @"Local Test";   //通知内容

08.localNotif.applicationIconBadgeNumber = 1;  //数字标示

09.localNotif.userInfo = @{@"key":@"test"};    //info

10.[[UIApplication sharedApplication] scheduleLocalNotification:localNotif]; //注册通知

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1.[[UIApplication sharedApplication] presentLocalNotificationNow:localNotif]; //立即通知

2.[[UIApplication sharedApplication] cancelAllLocalNotifications]; //取消所有通知

3.[[UIApplication sharedApplication] cancelLocalNotification:localNotif]; //取消特定的通知

4. 

5.NSArray *arr = [[UIApplication sharedApplication] scheduledLocalNotifications];  //所有的通知

后台运行相关

 

 

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01.[[UIApplication sharedApplication] applicationState]; //app状态  

02.[[UIApplication sharedApplication] setMinimumBackgroundFetchInterval:3600]; //设置后台运行时间

03.NSTimeInterval remainTime = [[UIApplication sharedApplication] backgroundTimeRemaining]; //app后台运行的时间

04.NSLog(@"remainTIme = %f",remainTime);

05.int state = [[UIApplication sharedApplication] backgroundRefreshStatus]; //后台刷新的状态

06.NSLog(@"state = %d",state);

07.[[UIApplication sharedApplication] beginBackgroundTaskWithName:@"taskOne" expirationHandler:^{

08.}];

09.[[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{ 

10.}];

11.[[UIApplication sharedApplication] endBackgroundTask:1];

远程的控制相关

 

 

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1.[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

2.[[UIApplication sharedApplication] endReceivingRemoteControlEvents];

系统的Idle Timer

 

 

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1.[UIApplication sharedApplication].idleTimerDisabled = YES; //不让手机休眠

APP样式

 

 

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01.//隐藏状态条

02.[[UIApplication sharedApplication] setStatusBarHidden:YES];

03.[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationSlide];

04.//设置状态条的样式

05.[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];

06.[[UIApplication sharedApplication] statusBarStyle];

07.//状态条的Frame

08.[[UIApplication sharedApplication] statusBarFrame];

09.//网络是否可见

10.[[UIApplication sharedApplication] isNetworkActivityIndicatorVisible];

11.//badge数字

12.[UIApplication sharedApplication].applicationIconBadgeNumber = 2;

13.//屏幕的方向

14.[[UIApplication sharedApplication] userInterfaceLayoutDirection];

设置状态条的方向

 

 

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1.[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeLeft animated:YES];

数据类型

 

 

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1.UIBackgroundTaskIdentifier : Int

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1.typedef enum : NSUInteger {

2.UIRemoteNotificationTypeNone    = 0,

3.UIRemoteNotificationTypeBadge   = 1 << 0,

4.UIRemoteNotificationTypeSound   = 1 << 1,

5.UIRemoteNotificationTypeAlert   = 1 << 2,

6.UIRemoteNotificationTypeNewsstandContentAvailability = 1 << 3

7.} UIRemoteNotificationType;

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1.typedef enum : NSInteger {

2.UIStatusBarStyleDefault,

3.UIStatusBarStyleLightContent,

4. 

5.UIStatusBarStyleBlackTranslucent,

6.UIStatusBarStyleBlackOpaque

7.} UIStatusBarStyle;

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1.typedef enum : NSInteger {

2.UIStatusBarAnimationNone,

3.UIStatusBarAnimationFade,

4.UIStatusBarAnimationSlide,

5.} UIStatusBarAnimation;

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1.typedef enum : NSInteger  {

2.UIApplicationStateActive ,

3.UIApplicationStateInactive ,

4.UIApplicationStateBackground 

5.} UIApplicationState;

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1.const UIBackgroundTaskIdentifier  UIBackgroundTaskInvalid ;

2.const NSTimeInterval  UIMinimumKeepAliveTimeout;

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1.typedef enum : NSUInteger  {

2.UIBackgroundFetchResultNewData ,

3.UIBackgroundFetchResultNoData ,

4.UIBackgroundFetchResultFailed 

5.} UIBackgroundFetchResult;

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1.const NSTimeInterval  UIApplicationBackgroundFetchIntervalMinimum ;

2.const NSTimeInterval  UIApplicationBackgroundFetchIntervalNever;

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1.typedef enum : NSUInteger  {

2.UIBackgroundRefreshStatusRestricted ,

3.UIBackgroundRefreshStatusDenied ,

4.UIBackgroundRefreshStatusAvailable 

5.} UIBackgroundRefreshStatus;

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1.typedef enum : NSInteger  {

2.UIInterfaceOrientationUnknown             = UIDeviceOrientationUnknown ,

3.UIInterfaceOrientationPortrait            = UIDeviceOrientationPortrait ,

4.UIInterfaceOrientationPortraitUpsideDown  = UIDeviceOrientationPortraitUpsideDown ,

5.UIInterfaceOrientationLandscapeLeft       = UIDeviceOrientationLandscapeRight ,

6.UIInterfaceOrientationLandscapeRight      = UIDeviceOrientationLandscapeLeft 

7.} UIInterfaceOrientation;

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1.typedef enum : NSInteger  {

2.UIUserInterfaceLayoutDirectionLeftToRight ,

3.UIUserInterfaceLayoutDirectionRightToLeft ,

4.} UIUserInterfaceLayoutDirection;

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1.NSString *const  UIApplicationOpenSettingsURLString;

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1.NSString *const  UIApplicationStatusBarOrientationUserInfoKey ;

2.NSString *const  UIApplicationStatusBarFrameUserInfoKey;

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1.NSString *const  UIContentSizeCategoryExtraSmall ;

2.NSString *const  UIContentSizeCategorySmall ;

3.NSString *const  UIContentSizeCategoryMedium ;

4.NSString *const  UIContentSizeCategoryLarge ;

5.NSString *const  UIContentSizeCategoryExtraLarge ;

6.NSString *const  UIContentSizeCategoryExtraExtraLarge ;

7.NSString *const  UIContentSizeCategoryExtraExtraExtraLarge;

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1.NSString *const  UIContentSizeCategoryAccessibilityMedium ;

2.NSString *const  UIContentSizeCategoryAccessibilityLarge ;

3.NSString *const  UIContentSizeCategoryAccessibilityExtraLarge ;

4.NSString *const  UIContentSizeCategoryAccessibilityExtraExtraLarge ;

5.NSString *const  UIContentSizeCategoryAccessibilityExtraExtraExtraLarge;

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1.NSString *const  UIApplicationInvalidInterfaceOrientationException;

通知

 

 

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01.UIApplicationBackgroundRefreshStatusDidChangeNotification

02.UIApplicationDidBecomeActiveNotification

03.UIApplicationDidChangeStatusBarFrameNotification

04.UIApplicationDidChangeStatusBarOrientationNotification

05.UIApplicationDidEnterBackgroundNotification

06.UIApplicationDidFinishLaunchingNotification

07.UIApplicationDidReceiveMemoryWarningNotification

08.UIApplicationProtectedDataDidBecomeAvailable

09.UIApplicationProtectedDataWillBecomeUnavailable

10.UIApplicationSignificantTimeChangeNotification

11.UIApplicationUserDidTakeScreenshotNotification

12.UIApplicationWillChangeStatusBarOrientationNotification

13.UIApplicationWillChangeStatusBarFrameNotification

14.UIApplicationWillEnterForegroundNotification

15.UIApplicationWillResignActiveNotification

16.UIApplicationWillTerminateNotification

17.UIContentSizeCategoryDidChangeNotification