SwiftUI中使用CoreLocation实现反向地理编码获取地址的问题

1. 现有代码是否包含反向地理编码全部必要内容 #

你已经完成了核心逻辑的搭建，但存在几处需要调整的问题：

• getAddress方法声明了handler闭包参数，但全程没有调用该闭包返回地址结果
• 地址拼接逻辑存在笔误：let street = placemark.subThoroughfare应改为let street = placemark.thoroughfare，否则街道名称会和门牌号重复
• 缺少CLLocationManagerDelegate的locationManager(_:didUpdateLocations:)代理方法，无法实时捕获最新的位置坐标
• getAddress方法末尾的print(self.currentAddress)执行在反编码异步回调之前，永远会输出空值

2. 闭包返回值到SwiftUI视图 + getPlace方法调用方式 #

第一步：修正getAddress方法的闭包调用逻辑 #

将原getAddress方法内的异步回调部分补充闭包调用：

func getAddress(handler: @escaping (String) -> Void) {
    self.currentAddress = ""
    guard let location = self.locationManager.location else {
        handler("位置未获取")
        return
    }
    let geoCoder = CLGeocoder()
    geoCoder.reverseGeocodeLocation(location) { placemarks, error in
        guard error == nil, let placemark = placemarks?.first else {
            DispatchQueue.main.async {
                self.currentAddress = "地址未知"
                handler(self.currentAddress)
            }
            return
        }
        var addressStr = ""
        if let streetNumber = placemark.subThoroughfare,
           let street = placemark.thoroughfare,
           let city = placemark.locality,
           let state = placemark.administrativeArea {
            addressStr = "\(streetNumber) \(street) \(city) \(state)"
        } else if let city = placemark.locality, let state = placemark.administrativeArea {
            addressStr = "\(city) \(state)"
        } else {
            addressStr = "地址未知"
        }
        DispatchQueue.main.async {
            self.currentAddress = addressStr
            handler(addressStr)
        }
    }
}

第二步：SwiftUI视图中调用方法示例 #

以下是完整的ContentView实现，包含getPlace方法的调用逻辑：

import SwiftUI
import CoreLocation

struct ContentView: View {
    // 用@StateObject持有全局的LocationManager
    @StateObject private var lm = LocationManager()
    @State private var entryLat: Double = 0.0
    @State private var entryLong: Double = 0.0
    @State private var displayAddress: String = "正在获取地址..."
    
    var body: some View {
        VStack(spacing: 20) {
            Text("当前坐标：\(entryLat), \(entryLong)")
            Text("当前地址：\(displayAddress)")
            Button("刷新地址") {
                fetchLocationAndAddress()
            }
        }
        .onAppear {
            lm.startLocationServices()
            fetchLocationAndAddress()
        }
    }
    
    private func fetchLocationAndAddress() {
        // 获取坐标
        let coordinate = lm.getLocationCoordinates()
        entryLat = coordinate.0
        entryLong = coordinate.1
        
        // 方式1：调用getAddress方法直接获取地址字符串
        lm.getAddress { address in
            displayAddress = address
        }
        
        // 方式2：调用getPlace方法获取CLPlacemark对象
        let location = CLLocation(latitude: entryLat, longitude: entryLong)
        lm.getPlace(for: location) { placemark in
            guard let place = placemark else { return }
            // 可以按需取place的任意属性，比如邮编、国家等
            print("邮编：\(place.postalCode ?? "无")")
            print("国家：\(place.country ?? "无")")
        }
    }
}

内容的提问来源于stack exchange，提问作者Galen Smith