CLLocationCoordinate2D纬度和经度NSString

Question

我正在尝试将我的MapKit View纬度和经度设置为来自NSStrings的值。虽然当我尝试设置它们时，我得到错误：

Assigning to 'CLLocationDegrees' (aka 'double') from incompatible type 'NSString *_ strong'

以下是我的代码

CLLocationCoordinate2D zoomLocation;

zoomLocation.latitude = latitudevariable;
zoomLocation.longitude = longitudevariable;

两个变量都是NSStrings

Answer 1

所以我将变量改为

zoomLocation.latitude = [latitudevariable doubleValue];
zoomLocation.longitude = [longitudevariable doubleValue];