為什么我彈出/ self時不調用deinit.dismiss我的WKInterfacecontroller

Question

我正在獲取用戶位置，我創建了單例類以在需要時獲取用戶位置。 但它正在創造保留周期。 如果我使用LocationManager類，則不會調用deint。 如果我不使用此類，則可以按預期正確地調用此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
    }
}
}

從WKInterfaceController，我正在調用此方法

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)
    })
}

每當調用WKInterface的willActivate時，我都會調用此getUserCurrentLocation方法。 還有其他更好的方法嗎？ 這樣就不會產生保留周期。

Answer 1

在LocationManager類本身中，似乎沒有什么錯，但是您持有對從WKINterfaceController類調用的getUserCurrentLocation函數中傳遞的onSuccessBlock和onFailedBlock的強引用。 如果您將self保留在這些塊中，則LocationManager將強烈引用WKInterfaceController類，因此不會調用deinit 。 您可以WKInterfaceController的代碼嗎？ 然后我們可以說更多。

編輯：是的，您在onSuccessBlock捕獲self為weak ，但在onFailedBlock捕獲self為weak 。 如果在onFailedBlock的開始處將[weak self] in語句中，則它應該可以工作。