OC--UIApplication基础知识整理

UIApplication

UIApplication属性和方法

    //获得UIApplication
    UIApplication *application=[UIApplication sharedApplication];
    
    //获得UIApplication Delegate对象
    [application delegate];
    
    //UIWindow数组
    [application windows];
    //UIWindow数组中最后调用makeKeyAndVisible方法的UIWindow对象
    [application keyWindow];

    [application beginIgnoringInteractionEvents];//开始忽略Event
    //...中间调用动画等操作
    [application endIgnoringInteractionEvents];//结束忽略Event
    
    application.applicationSupportsShakeToEdit = YES;  //晃动是否有撤销或者重做动作
    
    NSURL *URL=nil;
    //不设置options,启动Safari方式打开这个Link的代表的网站
    [application openURL:URL options:@{} completionHandler:nil];
    
    //设置options @{UIApplicationOpenURLOptionUniversalLinksOnly : @YES}
    //打开Universal Link所对应的App
    [application openURL:URL options:@{UIApplicationOpenURLOptionUniversalLinksOnly : @YES} completionHandler:nil];
    
    //不让手机休眠
    application.idleTimerDisabled = YES;
    
    //隐藏状态条
    [application setStatusBarHidden:YES];
    [application setStatusBarHidden:YES withAnimation:UIStatusBarAnimationSlide];
    
    //设置状态条的样式
    [application setStatusBarStyle:UIStatusBarStyleDefault];
    [application statusBarStyle];
    
    //设置状态条的方向
    [application setStatusBarOrientation:UIInterfaceOrientationLandscapeLeft animated:YES];
    
    //状态条的Frame
    [application statusBarFrame];
    
    //网络是否可见--小菊花
    [application isNetworkActivityIndicatorVisible];
    
    //badge数字--icon小红点
    application.applicationIconBadgeNumber = 2;
    
    //屏幕的方向
    [application userInterfaceLayoutDirection];
    
    //远程通知
    UIUserNotificationType  types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
    UIUserNotificationSettings  *mySettings  = [UIUserNotificationSettings settingsForTypes:types categories:nil];
    [application registerUserNotificationSettings:mySettings]; //注册远程推送通知
    
    [application registerForRemoteNotifications];//注册
    [application unregisterForRemoteNotifications];//注销
    
    
    //本地通知  IOS10已经修改，由于项目没用本地推送，没有整理
    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
    [application scheduleLocalNotification:localNotif]; //注册通知
    
    [application presentLocalNotificationNow:localNotif]; //立即通知
    [application cancelAllLocalNotifications]; //取消所有通知
    [application cancelLocalNotification:localNotif]; //取消特定的通知
    
    NSArray *arr = [application scheduledLocalNotifications];
    
    //后台运行相关
    [application applicationState]; //app状态
    [application setMinimumBackgroundFetchInterval:3600]; //设置后台运行时间
    NSTimeInterval remainTime = [application backgroundTimeRemaining]; //app后台运行的时间
    NSLog(@"remainTIme = %f",remainTime);
    int state = [application backgroundRefreshStatus]; //后台刷新的状态
    NSLog(@"state = %d",state);
    [application beginBackgroundTaskWithName:@"taskOne" expirationHandler:^{}];
    [application beginBackgroundTaskWithExpirationHandler:^{}];
    [application endBackgroundTask:1];
    
    //远程的控制相关
    [application beginReceivingRemoteControlEvents];
    [application endReceivingRemoteControlEvents];

UIApplicationDelegate方法

// 程序启动将要完成的时候调用
- (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(nullable NSDictionary *)launchOptions{

    //被其他应用调用--UIApplicationLaunchOptionsURLKey
    NSURL *url = [launchOptions objectForKey:UIApplicationLaunchOptionsURLKey];
    if(url) {//做出相应的判断
        if ([[url scheme] isEqualToString:@"myapp"]) {
            //处理链接
        }
    }

    //若用户直接启动，lauchOptions内无数据;

    //若由其他应用程序通过openURL:启动，则UIApplicationLaunchOptionsURLKey对应的对象为启动URL（NSURL）,UIApplicationLaunchOptionsSourceApplicationKey对应启动的源应用程序的bundle ID (NSString)；

    //若由本地通知启动，则UIApplicationLaunchOptionsLocalNotificationKey对应的是为启动应用程序的的本地通知对象(UILocalNotification)；

    //若由远程通知启动，则UIApplicationLaunchOptionsRemoteNotificationKey对应的是启动应用程序的的远程通知信息userInfo（NSDictionary）；

    return YES;
}

// 程序启动完成的时候调用
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(nullable NSDictionary *)launchOptions{return YES;}

// 当应用程序获取焦点的时候调用--恢复数据
- (void)applicationDidBecomeActive:(UIApplication *)application{}

// 当应用程序失去焦点的时候调用--保存数据
- (void)applicationWillResignActive:(UIApplication *)application{}

// 当应用程序进入后台的时候调用，
- (void)applicationDidEnterBackground:(UIApplication *)application{}

// 当应用程序进入进台的时候调用
- (void)applicationWillEnterForeground:(UIApplication *)application{}

// 程序内存警告，可以一些内存的释放来抢救程序，如SD的缓存清除
- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application{}

// 当应用程序关闭的时候调用
- (void)applicationWillTerminate:(UIApplication *)application{}

/**
    以上是UIApplication基本的周期方法，会有很多种情况：
    1、程序启动：
    willFinishLaunchingWithOptions -> didFinishLaunchingWithOptions -> applicationDidBecomeActive

    2、程序从前台退出到后台
    applicationWillResignActive -> applicationDidEnterBackground

    3、程序从后台进入到前台
    applicationWillEnterForeground -> applicationDidBecomeActive

    4、双击home键切换程序：
    applicationWillResignActive -> applicationDidEnterBackground

    5、在前台双击home键杀死程序
    applicationWillResignActive -> applicationDidEnterBackground -> applicationWillTerminate

    6、从其他程序前台双击home键杀死后台程序
    applicationWillTerminate

    7、下拉通知栏或者上拉工具栏
    applicationWillResignActive
 
 */


// 当系统时间发生改变时执行
- (void)applicationSignificantTimeChange:(UIApplication *)application{}
//StatusBar相关
// 当StatusBar的方向要将变化时执行
- (void)application:(UIApplication *)application willChangeStatusBarOrientation:(UIInterfaceOrientation)newStatusBarOrientation duration:(NSTimeInterval)duration {}
// 当StatusBar的方向要将变化时执行
- (void)application:(UIApplication *)application didChangeStatusBarOrientation:(UIInterfaceOrientation)oldStatusBarOrientation {}
// 当StatusBar的frame要将变化时执行
- (void)application:(UIApplication *)application willChangeStatusBarFrame:(CGRect)newStatusBarFrame{}
// 当StatusBar的frame已经变化时执行
- (void)application:(UIApplication *)application didChangeStatusBarFrame:(CGRect)oldStatusBarFrame {}
//处理SchemeURL [application openURL:url];  IOS8
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {return YES;}
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(nullable NSString *)sourceApplication annotation:(id)annotation { return YES;}
//处理SchemeURL  IOS9
- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options{
    
}

推送这块苹果一直改，IOS7改到IOS10了，苹果爹爹厉害，年年在修改推送，项目已经一堆判断，理解并总结iOS7-10推送通知流程
最后还是用第三方（极光、个推），感谢他们😁