Question

我有一个动态数量的位置被绘制到mapkit上。我很好奇如何将当前的纬度和经度变成单个阵列，因为它们当前被打印为单独的对象，而不是像它应该的那样绘制地图。我知道问题，但不知道如何解决它。这是我当前生成坐标的代码 -

  do {
        let place = try myContext.executeFetchRequest(fetchRequest) as! [Places]

        for coords in place{
            let latarray = Double(coords.latitude!)
            let lonarray = Double(coords.longitude!)
            let arraytitles = coords.title!

            let destination:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latarray, lonarray)

        print(destination)

    } catch let error as NSError {
        // failure
        print("Fetch failed: \(error.localizedDescription)")
    }

这是控制台中的打印 - Output

我需要打印件才能正常工作 - Desired output

我希望你理解我的意思。我非常感谢任何帮助！谢谢你的阅读。

Answer 1

您可以创建CLLocationCoordinate2D s：

的数组

var coordinateArray: [CLLocationCoordinate2D] = []

if latarray.count == lonarray.count {
    for var i = 0; i < latarray.count; i++ {
        let destination = CLLocationCoordinate2DMake(latarray[i], lonarray[i])
        coordinateArray.append(destination)
    }
}

修改

在您的代码中，latarray和lonarray都不是数组。如果你想创建一个CLLocationCoordinate2D的数组，你应该添加一个变量来存储你的位置，你的for循环应该是这样的：

var locations: [CLLocationCoordinate2D] = [] for coords in place{ let lat = Double(coords.latitude!) let lon = Double(coords.longitude!) let title = coords.title! let destination = CLLocationCoordinate2DMake(lat, lon) print(destination) // This prints each location separately if !locations.contains(destination) { locations.append(destination) } } print(locations) // This prints all locations as an array // Now you can use your locations anywhere in the scope where you defined the array. func getLocationFromArray() { // Loop through the locations array: for location in locations { print(location) // Prints each location separately again } }

CLLocationCoordinate2D成一个数组

1 个答案: