NSLocationWhenInUseUsageDescription 警告，但我已经添加了

解决iOS应用程序中的NSLocationWhenInUseUsageDescription警告

swift
import CoreLocation
// 在需要定位的视图控制器中添加以下代码
let locationManager = CLLocationManager()
// 请求定位权限
locationManager.requestWhenInUseAuthorization()

swift
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate {
    let locationManager = CLLocationManager()
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 请求定位权限
        locationManager.requestWhenInUseAuthorization()
        
        // 设置定位更新代理
        locationManager.delegate = self
        
        // 开始定位更新
        locationManager.startUpdatingLocation()
    }
    
    // 定位更新回调
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        // 处理定位更新
    }
    
    // 定位失败回调
    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        // 处理定位失败
    }
}