为什么当我弹出/自我.dismemy WKInterfacecontroller时不调用deinit

Question

我正在获取用户位置，我已经创建了单例类来在需要时获取用户位置。 但它正在创建保留周期。 如果我使用位置管理器类，则不调用 deint。 如果我不使用这个类，这个 de按预期正确调用了 init。

class LocationManager: NSObject, CLLocationManagerDelegate  {
private var clLocationManager: CLLocationManager?
private var SuccessBlock:((_ latitude: String, _ longitude: String)->Void)?
private var OnFailedBlock:(()->Void)?
private var lat: String?
private var long: String?
static let shared: LocationManager = {
    let instance = LocationManager()
    return instance
}()
private override init() {
    super.init()
}

private  func invokeLocationManager() {
    if self.clLocationManager == nil {
        self.clLocationManager =  CLLocationManager()
        self.clLocationManager?.delegate = self
    }
    self.clLocationManager?.requestWhenInUseAuthorization()
    self.clLocationManager?.startUpdatingLocation()
}

func getUserCurrentLocation(onSucessBlok onSucessBlock:@escaping (_ lat: String, _ long: String)->Void, onFailedBlok onFailedBlock:@escaping ()->Void) ->Void {
    self.SuccessBlock = onSucessBlock
    self.OnFailedBlock = onFailedBlock
    self.invokeLocationManager()
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    self.clLocationManager?.stopUpdatingLocation()
    if locations.count > 0 {
        let userLocation = locations[0]
         self.long = String(userLocation.coordinate.longitude);
         self.lat = String(userLocation.coordinate.latitude);
        if self.SuccessBlock != nil {
            self.SuccessBlock!(self.lat!, self.long!)
            self.SuccessBlock = nil
        }
    } else {
        if self.OnFailedBlock != nil {
            self.OnFailedBlock!()
            self.OnFailedBlock = nil
        }
    }
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    if self.OnFailedBlock != nil {
        self.OnFailedBlock!()
        self.OnFailedBlock = nil
    }
}
}

从WKInterfaceController，我调用此方法

override func willActivate() {
    super.willActivate()
   self.getUserLocation()
}
private func getUserLocation() {
    LocationManager.shared.getUserCurrentLocation(onSucessBlok: { [weak self] (lat, long) in
        if CommonHelper.isStringValid(string: lat) && CommonHelper.isStringValid(string: long) {
            self?.fillInfoToDictionary(value:lat, key: KLatitude, type: InfoType.Acceleration)
            self?.fillInfoToDictionary(value:long, key: KLongitude, type: InfoType.Acceleration)
        }
    }, onFailedBlok: {

        self.fillInfoToDictionary(value:"0", key: KLatitude, type: InfoType.Acceleration)
        self.fillInfoToDictionary(value:"0", key: KLongitude, type: InfoType.Acceleration)
    })
}

每次调用 WKInterface 的 willActivate 时，我都会调用此 getUserCurrentLocation 方法。还有其他更好的方法吗？这样保留周期就不会产生。

Answer 1

LocationManager类本身似乎没有任何问题，但你持有对onSuccessBlock和onFailedBlock的强引用，该引用是在你从WKINterfaceController类调用的getUserCurrentLocation函数中传递的。如果您在这些块中保留self，则LocationManager将具有对WKInterfaceController类的强引用，因此不会调用deinit。你能把你的WKInterfaceController的代码吗？然后我们可以说更多。

编辑：是的，您正在捕获self weak在onSuccessBlock中，但在onFailedBlock中强烈。如果您将[weak self] in语句放在onFailedBlock的开头，它应该可以工作。