ios - 无法将 CGPoint 分配给 CLLocationCoordinate2D

Question

var touchPoint = gestuRerecognizer.locationInView(self.map)
var newCoordinate = map.convertPoint(touchPoint, fromCoordinateSpace: self.map)
var annotation = MKPointAnnotation()
annotation.coordinate = newCoordinate

这段代码给了我（不能将 'CGPoint' 类型的值分配给 'CLLocationCoordinate2D' 类型的值）错误。

Answer 1

它应该是：

let newCoordinate = map.convertPoint(touchPoint, toCoordinateFromView:self.map)
annotation.coordinate = newCoordinate

代替：

var newCoordinate = map.convertPoint(touchPoint, fromCoordinateSpace:self.map)

因为它返回的是 a CGPoint，而不是 a CLLocationCoordinate2D，这会在您分配newCoordinate给时导致错误annotation.coordinate。