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我正在尝试使用以下链接构建 Simple HERE SDK 应用程序。

https://developer.here.com/documentation/ios-premium/3.17/dev_guide/topics/app-simple-swift.html

我进入第 4 步（通过将 viewDidLoad() 函数替换为 viewWillAppear(animated) 和 addMapCircle() 来实现 NMAMapView 设置和生命周期代码:)

override func viewWillAppear(_ animated: Bool) {
  super.viewWillAppear(animated)
  mapView.useHighResolutionMap = true
  mapView.zoomLevel = 13.2
  mapView.set(geoCenter: NMAGeoCoordinates(latitude: 49.258867, longitude: -123.008046),
    animation: .linear)
  // Note, logo is not shown when its size is greater than 1/8 of NMAMapView's height or width.
  mapView.copyrightLogoPosition = NMALayoutPosition.bottomCenter
  addMapCircle()
}

func addMapCircle() {
  if mapCircle == nil {
    let coordinates: NMAGeoCoordinates =
      NMAGeoCoordinates(latitude: 49.258867, longitude: -123.008046)
    mapCircle = NMAMapCircle(coordinates: coordinates, radius: 50)
    mapView.add(mapCircle!)
  }
}

几个问题：

  1. mapView.useHighResolutionMap = true 然后Xcode说没有成员'useHighResolutionMap'

  2. if mapCircle == nil { 然后 Xcode 说在范围内找不到“mapCircle”

这是官方示例代码，所以我希望它可以工作？

如果我注释掉//mapView.useHighResolutionMap = true 并引用addMapCircle代码，那么项目就会构建。

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