UIApplication的一些知识
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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
[[UIApplication sharedApplication] delegate]获得UIWindow对象
[[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{//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];}
[[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
[UIApplication sharedApplication].applicationSupportsShakeToEdit = YES; //晃动是否有撤销或者重做动作打开URL资源
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];//打开设置界面配置通知设置
UIUserNotificationType types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;UIUserNotificationSettings *mySettings = [UIUserNotificationSettings settingsForTypes:types categories:nil];[[UIApplication sharedApplication] registerUserNotificationSettings:mySettings]; //注册远程推送通知
[[UIApplication sharedApplication] registerForRemoteNotifications];//注册[[UIApplication sharedApplication] unregisterForRemoteNotifications];//注销
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
[[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 [[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]; [[UIApplication sharedApplication] endReceivingRemoteControlEvents];系统的Idle Timer
[UIApplication sharedApplication].idleTimerDisabled = YES; //不让手机休眠APP样式
//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
[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeLeft animated:YES];数据类型
UIBackgroundTaskIdentifier : Int
typedef enum : NSUInteger { UIRemoteNotificationTypeNone = 0, UIRemoteNotificationTypeBadge = 1 << 0, UIRemoteNotificationTypeSound = 1 << 1, UIRemoteNotificationTypeAlert = 1 << 2, UIRemoteNotificationTypeNewsstandContentAvailability = 1 << 3} UIRemoteNotificationType;
typedef enum : NSInteger { UIStatusBarStyleDefault, UIStatusBarStyleLightContent, UIStatusBarStyleBlackTranslucent, UIStatusBarStyleBlackOpaque} UIStatusBarStyle;
typedef enum : NSInteger { UIStatusBarAnimationNone, UIStatusBarAnimationFade, UIStatusBarAnimationSlide,} UIStatusBarAnimation;
typedef enum : NSInteger { UIApplicationStateActive , UIApplicationStateInactive , UIApplicationStateBackground } UIApplicationState;
const UIBackgroundTaskIdentifier UIBackgroundTaskInvalid ;const NSTimeInterval UIMinimumKeepAliveTimeout;
typedef enum : NSUInteger { UIBackgroundFetchResultNewData , UIBackgroundFetchResultNoData , UIBackgroundFetchResultFailed } UIBackgroundFetchResult;
const NSTimeInterval UIApplicationBackgroundFetchIntervalMinimum ;const NSTimeInterval UIApplicationBackgroundFetchIntervalNever;
typedef enum : NSUInteger { UIBackgroundRefreshStatusRestricted , UIBackgroundRefreshStatusDenied , UIBackgroundRefreshStatusAvailable } UIBackgroundRefreshStatus;
typedef enum : NSInteger { UIInterfaceOrientationUnknown = UIDeviceOrientationUnknown , UIInterfaceOrientationPortrait = UIDeviceOrientationPortrait , UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown , UIInterfaceOrientationLandscapeLeft = UIDeviceOrientationLandscapeRight , UIInterfaceOrientationLandscapeRight = UIDeviceOrientationLandscapeLeft } UIInterfaceOrientation;
typedef enum : NSInteger { UIUserInterfaceLayoutDirectionLeftToRight , UIUserInterfaceLayoutDirectionRightToLeft ,} UIUserInterfaceLayoutDirection;
NSString *const UIApplicationOpenSettingsURLString;
NSString *const UIApplicationStatusBarOrientationUserInfoKey ;NSString *const UIApplicationStatusBarFrameUserInfoKey;
NSString *const UIContentSizeCategoryExtraSmall ;NSString *const UIContentSizeCategorySmall ;NSString *const UIContentSizeCategoryMedium ;NSString *const UIContentSizeCategoryLarge ;NSString *const UIContentSizeCategoryExtraLarge ;NSString *const UIContentSizeCategoryExtraExtraLarge ;NSString *const UIContentSizeCategoryExtraExtraExtraLarge;
NSString *const UIContentSizeCategoryAccessibilityMedium ;NSString *const UIContentSizeCategoryAccessibilityLarge ;NSString *const UIContentSizeCategoryAccessibilityExtraLarge ;NSString *const UIContentSizeCategoryAccessibilityExtraExtraLarge ;NSString *const UIContentSizeCategoryAccessibilityExtraExtraExtraLarge;
NSString *const UIApplicationInvalidInterfaceOrientationException;通知
UIApplicationBackgroundRefreshStatusDidChangeNotificationUIApplicationDidBecomeActiveNotificationUIApplicationDidChangeStatusBarFrameNotificationUIApplicationDidChangeStatusBarOrientationNotificationUIApplicationDidEnterBackgroundNotificationUIApplicationDidFinishLaunchingNotificationUIApplicationDidReceiveMemoryWarningNotificationUIApplicationProtectedDataDidBecomeAvailableUIApplicationProtectedDataWillBecomeUnavailableUIApplicationSignificantTimeChangeNotificationUIApplicationUserDidTakeScreenshotNotificationUIApplicationWillChangeStatusBarOrientationNotificationUIApplicationWillChangeStatusBarFrameNotificationUIApplicationWillEnterForegroundNotificationUIApplicationWillResignActiveNotificationUIApplicationWillTerminateNotificationUIContentSizeCategoryDidChangeNotification
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