如何将纬度和经度转换为swift中的浮点值

Question

I have tried the below code : but it shows error cannot convert value of type float to expected argument type CLLocation degrees(aka Double)

    let lat = self.mallData.valueForKey("lat") as! Float
    let lon = self.mallData.valueForKey("lon")



    let mapLocation : CLLocationCoordinate2D = CLLocationCoordinate2DMake(lat, lon)

Answer 1

The CLLocationCoordinate2DMake supports Double values. But you are converting lat and lon to Float .

Try converting Lat and Lon to Double .

Answer 2

Please check this answer

    let lat = self.mallData.valueForKey("lat")
    let lon = self.mallData.valueForKey("lon")

    let latDoubleValue = lat?.doubleValue
    let longDoubleValue = lon?.doubleValue
    let locationCoord : CLLocationCoordinate2D = CLLocationCoordinate2DMake(latDoubleValue!, longDoubleValue!)