Question

我对使用CoreLocation和Parse的理解相当新，所以请耐心等待！我用swift和很多SO帖子进行编码，我一直在搜索Obc-C，我对此非常不熟悉。

............................................ ..................... UPDATE ............................ ........................................... 尝试将当前用户位置存储到Parse数据库中但不起作用。我收到错误：

[错误]：会话令牌无效（代码：209，版本：1.9.1）可选（错误域= kCLErrorDomain代码= 0＆＃34;（null）＆＃34;）＆＃34;

有任何建议/帮助指出我正确的方向吗？

import UIKit
import Parse
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

var manager: CLLocationManager!
var activityIndicator:UIActivityIndicatorView = UIActivityIndicatorView()

@IBOutlet weak var username: UITextField!
@IBOutlet weak var password: UITextField!

@IBAction func signUp(sender: AnyObject) {

    activityIndicator = UIActivityIndicatorView(frame: CGRectMake(0, 0, 50, 50))
    activityIndicator.center = self.view.center
    activityIndicator.hidesWhenStopped = true
    activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
    view.addSubview(activityIndicator)
    activityIndicator.startAnimating()
    UIApplication.sharedApplication().beginIgnoringInteractionEvents()

    let user = PFUser()
    user.username = username.text
    user.password = password.text

    user.signUpInBackgroundWithBlock { (success, error) -> Void in
        self.activityIndicator.stopAnimating()
        UIApplication.sharedApplication().endIgnoringInteractionEvents()

        if error == nil {

            PFGeoPoint.geoPointForCurrentLocationInBackground { (geoPoint: PFGeoPoint?, error: NSError?) -> Void in
                if error == nil {
                    print("got location successfully")
                    PFUser.currentUser()!.setValue(geoPoint, forKey:"location")
                    PFUser.currentUser()!.saveInBackground()

                } else {
                    print(error)
                }
            }

            self.performSegueWithIdentifier("login", sender: self)

        } else {
            print(error)
        }
    }
}

@IBAction func login(sender: AnyObject) {

    activityIndicator = UIActivityIndicatorView(frame: CGRectMake(0, 0, 50, 50))
    activityIndicator.center = self.view.center
    activityIndicator.hidesWhenStopped = true
    activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
    view.addSubview(activityIndicator)
    activityIndicator.startAnimating()
    UIApplication.sharedApplication().beginIgnoringInteractionEvents()

    PFUser.logInWithUsernameInBackground(username.text!, password: password.text!) { (success, error) -> Void in
        if error == nil {
            self.activityIndicator.stopAnimating()
            UIApplication.sharedApplication().endIgnoringInteractionEvents()
            self.performSegueWithIdentifier("login", sender: self)
        } else {
            print(error)
        }
    }

}

override func viewDidLoad() {
    super.viewDidLoad()

    manager = CLLocationManager()
    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.requestWhenInUseAuthorization()
    manager.startUpdatingLocation()

}

Answer 1

我建议将geopoint存储在Cobol+Hibernate课程中。此外，您应该向创建它的User添加指针，而不是向每个Post添加地理点。这消除了两次存储位置的冗余，并确保您不必混淆保持两个变量同步。此外，这也比直接存储objectId更好。

更新您的User课程，以获得名为Post的{{1}}指针列。然后而不是

User

使用

user

值得指出的是，Parse包括helper methods to get the current user's locations。它就像下面的

一样简单

postEvent["userId"] = PFUser.currentUser()!.objectId!

如果您决定自己处理postEvent["user"] = PFUser.currentUser()!，请确保在更新用户位置后致电PFGeoPoint.geoPointForCurrentLocationInBackground { (geoPoint: PFGeoPoint?, error: NSError?) -> Void in if error == nil { // do something with the new geoPoint } }以节省电池续航时间，假设您不需要连续的位置更新。< / p>

从那里，您可以使用query constraints和compound query来获取所有附近的CLLocationManager个对象。特别是，您需要使用stopUpdatingLocation()作为复合查询，该查询仅计为1个API请求。

Post

Parse和Swift - 使用CLLocationManager的PFGeoPoint？

1 个答案: