方向app模糊的成员

Question

我有一个方向ap，但我对'directionsusinggoogle'错误的成员不明确。它使用google places api来计算方向等。这是我的代码。这是错误的图像。

   <?php
$con=mysqli_connect("localhost","huj","huj","emails");

// Check connection
if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

// escape variables for security
$firstname = mysqli_real_escape_string($con, $_POST['name']);


$sql="INSERT INTO emails (email)
VALUES ('$firstname')";

if (!mysqli_query($con,$sql)) {
  die('Error: ' . mysqli_error($con));
}
echo "1 record added";

mysqli_close($con);
?>

Answer 1

假设您使用https://github.com/varshylmobile/MapManager/blob/master/MapManager.swift并将其转换为 Swift 3 ，则API具有以下签名：

func directionsUsingGoogle(from:NSString, to:NSString,
    directionCompletionHandler:DirectionsCompletionHandler)

func directionsUsingGoogle(from:CLLocationCoordinate2D, to:CLLocationCoordinate2D,
    directionCompletionHandler:DirectionsCompletionHandler)

func directionsUsingGoogle(from:CLLocationCoordinate2D, to:NSString,
    directionCompletionHandler:DirectionsCompletionHandler)

注意NSString，因此：

mapManager.directionsUsingGoogle(
    from: txtFrom.text! as NSString,
    to: txtTo.text! as NSString,
    directionCompletionHandler: {(
        _ route:MKPolyline?,
        _ directionInformation:NSDictionary?,
        _ boundingRegion:MKMapRect?,
        _ error:String?) in
        ...
    }
)