UIApplication详解

http://www.open-open.com/lib/view/open1420634129218.html

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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[UIApplication sharedApplication]

获得UIApplicationDelegate对象

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[[UIApplication sharedApplication] delegate]

获得UIWindow对象

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[[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

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

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

配置通知设置

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UIUserNotificationType  types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;

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

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

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[[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

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

[[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

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[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

[[UIApplication sharedApplication] endReceivingRemoteControlEvents];

系统的Idle Timer

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

APP样式

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//隐藏状态条

[[UIApplication sharedApplication] setStatusBarHidden:YES];

[[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

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

数据类型

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UIBackgroundTaskIdentifier : Int

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typedefenum : NSUInteger {

   UIRemoteNotificationTypeNone    = 0,

   UIRemoteNotificationTypeBadge   = 1 << 0,

   UIRemoteNotificationTypeSound   = 1 << 1,

   UIRemoteNotificationTypeAlert   = 1 << 2,

   UIRemoteNotificationTypeNewsstandContentAvailability = 1 << 3

} UIRemoteNotificationType;

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typedefenum : NSInteger {

   UIStatusBarStyleDefault,

   UIStatusBarStyleLightContent,

    

   UIStatusBarStyleBlackTranslucent,

   UIStatusBarStyleBlackOpaque

} UIStatusBarStyle;

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typedefenum : NSInteger {

   UIStatusBarAnimationNone,

   UIStatusBarAnimationFade,

   UIStatusBarAnimationSlide,

} UIStatusBarAnimation;

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typedefenum : NSInteger  {

   UIApplicationStateActive ,

   UIApplicationStateInactive ,

   UIApplicationStateBackground

} UIApplicationState;

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constUIBackgroundTaskIdentifier  UIBackgroundTaskInvalid ;

constNSTimeInterval  UIMinimumKeepAliveTimeout;

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typedefenum : NSUInteger  {

   UIBackgroundFetchResultNewData ,

   UIBackgroundFetchResultNoData ,

   UIBackgroundFetchResultFailed

} UIBackgroundFetchResult;

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constNSTimeInterval  UIApplicationBackgroundFetchIntervalMinimum ;

constNSTimeInterval  UIApplicationBackgroundFetchIntervalNever;

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typedefenum : NSUInteger  {

   UIBackgroundRefreshStatusRestricted ,

   UIBackgroundRefreshStatusDenied ,

   UIBackgroundRefreshStatusAvailable

} UIBackgroundRefreshStatus;

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typedefenum : NSInteger  {

   UIInterfaceOrientationUnknown             = UIDeviceOrientationUnknown ,

   UIInterfaceOrientationPortrait            = UIDeviceOrientationPortrait ,

   UIInterfaceOrientationPortraitUpsideDown  = UIDeviceOrientationPortraitUpsideDown ,

   UIInterfaceOrientationLandscapeLeft       = UIDeviceOrientationLandscapeRight ,

   UIInterfaceOrientationLandscapeRight      = UIDeviceOrientationLandscapeLeft

} UIInterfaceOrientation;

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typedefenum : NSInteger  {

   UIUserInterfaceLayoutDirectionLeftToRight ,

   UIUserInterfaceLayoutDirectionRightToLeft ,

} UIUserInterfaceLayoutDirection;

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NSString *const UIApplicationOpenSettingsURLString;

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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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NSString *const UIApplicationInvalidInterfaceOrientationException;

通知

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UIApplicationBackgroundRefreshStatusDidChangeNotification

UIApplicationDidBecomeActiveNotification

UIApplicationDidChangeStatusBarFrameNotification

UIApplicationDidChangeStatusBarOrientationNotification

UIApplicationDidEnterBackgroundNotification

UIApplicationDidFinishLaunchingNotification

UIApplicationDidReceiveMemoryWarningNotification

UIApplicationProtectedDataDidBecomeAvailable

UIApplicationProtectedDataWillBecomeUnavailable

UIApplicationSignificantTimeChangeNotification

UIApplicationUserDidTakeScreenshotNotification

UIApplicationWillChangeStatusBarOrientationNotification

UIApplicationWillChangeStatusBarFrameNotification

UIApplicationWillEnterForegroundNotification

UIApplicationWillResignActiveNotification

UIApplicationWillTerminateNotification

UIContentSizeCategoryDidChangeNotification