我需要实现基于用户输入的地址搜索功能。对于地址建议，我使用MKLocalSearchCompleter。在检索到建议后，我需要根据地址的标题获取地标。为了获取地标，我使用CLGeocoder函数geocodeAddressString。由于这是一个cnrc函数，我需要执行多个请求，用每个地址一个接一个地单独调用它太慢了，因此我需要合并并同时执行它们。withTaskGroup似乎是一个完美的方法，但问题是，由于某种原因，任务组只是停止，没有任何错误或异常。2只有第一个任务通过，任务永远挂起。
我尝试用多种不同的方式重写同一个东西，但没有任何帮助。为了使这尽可能简单，我创建了一个单独的Playgrounds项目，只是为了尽可能隔离它。令我惊讶的是，这个问题仍然存在！下面是Playgrounds的代码：

import CoreLocation
import MapKit

class MapManager: NSObject, MKLocalSearchCompleterDelegate {
    
    let geocoder = CLGeocoder()
    
    private lazy var localSearchCompleter: MKLocalSearchCompleter = {
        let completer = MKLocalSearchCompleter()
        completer.delegate = self
        return completer
    }()
    
    func searchAddress(_ query: String) {
        localSearchCompleter.queryFragment = query
    }
    
    func completerDidUpdateResults(_ completer: MKLocalSearchCompleter) {
        Task {
            let placemarks = try! await withThrowingTaskGroup(of: [CLPlacemark].self) { group in
                
                var placemarks: [CLPlacemark] = []
                
                print(completer.results.count) // 15
                
                for result in completer.results {
                    print("Task was added to the group")
                    group.addTask { try! await self.geocoder.geocodeAddressString(result.title) }
                }
                
                
                for try await placemark in group {
                    print("Task appended to a list")
                    placemarks.append(contentsOf: placemark)
                }
                
                // This is never called
                return placemarks
            }
            
            print(placemarks)
        }
    }
}

let manager = MapManager()
manager.searchAddress("wall street")

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当基于查询“华尔街”搜索地址时，completer返回15个完成。我需要将15个任务添加到任务组，每个地址一个。然后对每个地址进行地理编码以获取其地标。问题是所有任务都添加到组中，但只有第一个任务被追加到列表中。下面是控制台输出：

15
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task was added to the group
Task appended to a list

型
我想知道这是CLGeocoder，MKLocalSearchCompleter，TaskGroup的问题还是我做错了什么。这看起来是一件非常简单的事情，它可以完美地与其他模拟类型和值一起工作，但由于某种原因，位置服务和任务组的组合完全破坏了项目。
多谢帮忙！