ios - 使用 segue 将 CLLocation 传递到下一个 View

Question

我在主视图中获取当前位置，并希望使用 segue 将此位置对象传递到下一个 View 。 segue 可能是正常的“显示”类型的新 View 页面，或“嵌入”类型的 subview 。这是我的脚本:

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    var clmanager: CLLocationManager!

    override func viewDidLoad() {
        super.viewDidLoad()
        clmanager = CLLocationManager()
        clmanager.delegate = self
        clmanager.requestWhenInUseAuthorization()
        clmanager.startUpdatingLocation()
    }

    var location : CLLocation?
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        location = locations[0]
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if (segue.identifier == "showSegue") { // This part is totally OK
            let dest = segue.destination as! ShowViewController
            dest.object = self.location
        }

        if (segue.identifier == "embedSegue") { // This part is not OK!!!
            let dest = segue.destination as! EmbedViewController
            dest.object = self.location
        }
    }
}

我认为“Show”和“Embed”类型的区别在于，“Show”类型是由用户手动激活，而“Embed”类型是立即 strong> 在加载主视图时激活。那时，该位置尚不可用。

如何让“嵌入”部分成功？ 我希望如果更新的位置可用，嵌入的 subview 应该自动更新。

Answer 1

在你的 detailViewController 中添加这个

var location : CLLocation?

//在第一个类中声明一个位置变量..

 var location : CLLocation?
    // Get location
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
       // Ammendment here
        location = locations[0]

    print(location)
}

// Pass to the next view
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if (segue.identifier == "thisSegue") {
        let dest = segue.destination as! DetailViewController
        dest.location = self.location
    }
}

您需要确保在 didUpdateLocations 方法中有可用位置时 show 执行 segue