ios - CLLocationManager 的事件序列

Question

我正在阅读 application:didFinishLaunchingWithOptions:方法并从 NSHipster 中发现以下代码:

@import CoreLocation;

@interface AppDelegate () <CLLocationManagerDelegate>
@property (readwrite, nonatomic, strong) CLLocationManager *locationManager;
@end

- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // ...

    if (![CLLocationManager locationServicesEnabled]) {
    [[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Location Services Disabled", nil)
                                message:NSLocalizedString(@"You currently have all location services for this device disabled. If you proceed, you will be asked to confirm whether location services should be reenabled.", nil)
                               delegate:nil
                      cancelButtonTitle:NSLocalizedString(@"OK", nil)
                      otherButtonTitles:nil] show];
    } else {
        self.locationManager = [[CLLocationManager alloc] init];
        self.locationManager.delegate = self;
        [self.locationManager startMonitoringSignificantLocationChanges];
    }

    if (launchOptions[UIApplicationLaunchOptionsLocationKey]) {
        [self.locationManager startUpdatingLocation];
    }
}

我已经研究过 this question ，但我仍然对事件的顺序感到困惑。如果我错了请纠正我:

当应用程序首次启动时，CLLocationManager 得到设置(如果启用了位置服务)并开始监视位置的重大变化。当应用程序随后终止时，CLLocationManager 是否会继续监视更改？据我所知，事实并非如此。那么如果有新的定位事件如何启动呢？我知道接下来应用程序将通过传递给 application:didFinishLaunchingWithOptions: 的 UIApplicationLaunchOptionsLocationKey 重新启动。它是在后台完成的吗？现在 CLLocationManager 将首先(再次)进行设置，紧接着 locationManager 将开始根据事件更新位置。之后 CLLocationManager 将继续监视更改。

相关问题:当​​有新的位置事件并且应用程序正在运行(在后台或前台)时，会调用什么委托(delegate)？

Answer 1

当应用程序随后终止时，CLLocationManager 是否会继续监视更改？
-> 你猜对了。 它不是，但您的操作系统监控并知道此应用程序可能需要它，因为您调用了 startMonitoringSignificantLocationChanges:.

你的问题 -我知道接下来应用程序会重新启动，UIApplicationLaunchOptionsLocationKey 传递给 application:didFinishLaunchingWithOptions:。是后台完成的吗？

Ans-> 是,

If you start this service and your application is subsequently terminated, the system -automatically relaunches the application into the background if a new event arrives. In such a case, the options dictionary passed to the application:didFinishLaunchingWithOptions: method of your application delegate contains the key UIApplicationLaunchOptionsLocationKey to indicate that your application was launched because of a location event.

当出现新的位置事件并且应用正在运行(在后台或前台)时，会调用什么委托(delegate)？

您提供的链接说明了一切。当您的应用程序在前台或后台运行时，如果一个新的位置事件到达，并且您的应用程序变为事件状态，您的 CLLocationManagerDelegate 仍将被调用。