ios UIApplication简单使用

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

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

控制和处理UIEvent

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

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{//分发一个event到另外一个对象去处理     [[UIApplication sharedApplication] sendAction:@selector(action: forEvent:) to:[CustomHandler sharedCustomHandler] from:self forEvent:event]; }

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[[UIApplication sharedApplication] beginIgnoringInteractionEvents]; //开始忽略Event //...中间调用动画等操作 [[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 

 UIUserNotificationType types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;

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1 2	UIUserNotificationSettings  *mySettings  = [UIUserNotificationSettings settingsForTypes:types categories:nil]; [[UIApplication sharedApplication] registerUserNotificationSettings:mySettings]; //注册远程推送通知

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1 2	[[UIApplication sharedApplication] registerForRemoteNotifications];//注册 [[UIApplication sharedApplication] unregisterForRemoteNotifications];//注销

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NSDate *date = [NSDate dateWithTimeIntervalSinceNow:10]; UILocalNotification *localNotif = [[UILocalNotification alloc] init]; localNotif.fireDate = date;  //时间 localNotif.timeZone = [NSTimeZone localTimeZone]; //时区 localNotif.repeatInterval = NSCalendarUnitMinute; //间隔 localNotif.soundName = UILocalNotificationDefaultSoundName; //声音 localNotif.alertBody = @"Local Test";   //通知内容 localNotif.applicationIconBadgeNumber = 1;  //数字标示 localNotif.userInfo = @{@"key":@"test"};    //info [[UIApplication sharedApplication] scheduleLocalNotification:localNotif]; //注册通知

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[[UIApplication sharedApplication] presentLocalNotificationNow:localNotif]; //立即通知 [[UIApplication sharedApplication] cancelAllLocalNotifications]; //取消所有通知 [[UIApplication sharedApplication] cancelLocalNotification:localNotif]; //取消特定的通知   NSArray *arr = [[UIApplication sharedApplication] scheduledLocalNotifications];  //所有的通知

后台运行相关 

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

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[[UIApplication sharedApplication] setMinimumBackgroundFetchInterval:3600]; //设置后台运行时间 NSTimeInterval remainTime = [[UIApplication sharedApplication] backgroundTimeRemaining]; //app后台运行的时间 NSLog(@"remainTIme = %f",remainTime); int state = [[UIApplication sharedApplication] backgroundRefreshStatus]; //后台刷新的状态 NSLog(@"state = %d",state); [[UIApplication sharedApplication] beginBackgroundTaskWithName:@"taskOne" expirationHandler:^{ }]; [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{ }]; [[UIApplication sharedApplication] endBackgroundTask:1];

远程的控制相关 

     [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

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1	[[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 

    //隐藏状态条

    [[UIApplication sharedApplication] setStatusBarHidden:YES];

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[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationSlide]; //设置状态条的样式 [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault]; [[UIApplication sharedApplication] statusBarStyle]; //状态条的Frame [[UIApplication sharedApplication] statusBarFrame]; //网络是否可见 [[UIApplication sharedApplication] isNetworkActivityIndicatorVisible]; //badge数字 [UIApplication sharedApplication].applicationIconBadgeNumber = 2; //屏幕的方向 [[UIApplication sharedApplication] userInterfaceLayoutDirection];

设置状态条的方向 

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

数据类型 

 UIBackgroundTaskIdentifier : Int

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typedef enum : NSUInteger {    UIRemoteNotificationTypeNone    = 0,    UIRemoteNotificationTypeBadge   = 1 << 0,    UIRemoteNotificationTypeSound   = 1 << 1,    UIRemoteNotificationTypeAlert   = 1 << 2,    UIRemoteNotificationTypeNewsstandContentAvailability = 1 << 3 } UIRemoteNotificationType;

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typedef enum : NSInteger {    UIStatusBarStyleDefault,    UIStatusBarStyleLightContent,         UIStatusBarStyleBlackTranslucent,    UIStatusBarStyleBlackOpaque } UIStatusBarStyle;

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typedef enum : NSInteger {    UIStatusBarAnimationNone,    UIStatusBarAnimationFade,    UIStatusBarAnimationSlide, } UIStatusBarAnimation;

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typedef enum : NSInteger  {    UIApplicationStateActive ,    UIApplicationStateInactive ,    UIApplicationStateBackground } UIApplicationState;

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1 2	const UIBackgroundTaskIdentifier  UIBackgroundTaskInvalid ; const NSTimeInterval  UIMinimumKeepAliveTimeout;

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typedef enum : NSUInteger  {    UIBackgroundFetchResultNewData ,    UIBackgroundFetchResultNoData ,    UIBackgroundFetchResultFailed } UIBackgroundFetchResult;

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1 2	const NSTimeInterval  UIApplicationBackgroundFetchIntervalMinimum ; const NSTimeInterval  UIApplicationBackgroundFetchIntervalNever;

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typedef enum : NSUInteger  {    UIBackgroundRefreshStatusRestricted ,    UIBackgroundRefreshStatusDenied ,    UIBackgroundRefreshStatusAvailable } UIBackgroundRefreshStatus;

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typedef enum : NSInteger  {    UIInterfaceOrientationUnknown             = UIDeviceOrientationUnknown ,    UIInterfaceOrientationPortrait            = UIDeviceOrientationPortrait ,    UIInterfaceOrientationPortraitUpsideDown  = UIDeviceOrientationPortraitUpsideDown ,    UIInterfaceOrientationLandscapeLeft       = UIDeviceOrientationLandscapeRight ,    UIInterfaceOrientationLandscapeRight      = UIDeviceOrientationLandscapeLeft } UIInterfaceOrientation;

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typedef enum : NSInteger  {    UIUserInterfaceLayoutDirectionLeftToRight ,    UIUserInterfaceLayoutDirectionRightToLeft , } UIUserInterfaceLayoutDirection;

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1	NSString *const  UIApplicationOpenSettingsURLString;

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1 2	NSString *const  UIApplicationStatusBarOrientationUserInfoKey ; NSString *const  UIApplicationStatusBarFrameUserInfoKey;

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NSString *const  UIContentSizeCategoryExtraSmall ; NSString *const  UIContentSizeCategorySmall ; NSString *const  UIContentSizeCategoryMedium ; NSString *const  UIContentSizeCategoryLarge ; NSString *const  UIContentSizeCategoryExtraLarge ; NSString *const  UIContentSizeCategoryExtraExtraLarge ; NSString *const  UIContentSizeCategoryExtraExtraExtraLarge;

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NSString *const  UIContentSizeCategoryAccessibilityMedium ; NSString *const  UIContentSizeCategoryAccessibilityLarge ; NSString *const  UIContentSizeCategoryAccessibilityExtraLarge ; NSString *const  UIContentSizeCategoryAccessibilityExtraExtraLarge ; NSString *const  UIContentSizeCategoryAccessibilityExtraExtraExtraLarge;

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1	NSString *const  UIApplicationInvalidInterfaceOrientationException;

通知 

UIApplicationBackgroundRefreshStatusDidChangeNotification

UIApplicationDidBecomeActiveNotification

UIApplicationDidChangeStatusBarFrameNotification

UIApplicationDidChangeStatusBarOrientationNotification

UIApplicationDidEnterBackgroundNotification

UIApplicationDidFinishLaunchingNotification

UIApplicationDidReceiveMemoryWarningNotification

UIApplicationProtectedDataDidBecomeAvailable

UIApplicationProtectedDataWillBecomeUnavailable

UIApplicationSignificantTimeChangeNotification

UIApplicationUserDidTakeScreenshotNotification

UIApplicationWillChangeStatusBarOrientationNotification

UIApplicationWillChangeStatusBarFrameNotification

UIApplicationWillEnterForegroundNotification

UIApplicationWillResignActiveNotification

UIApplicationWillTerminateNotification

UIContentSizeCategoryDidChangeNotification