演员加倍？

Question

我怎样才能转动或者将某些东西变成双人？ CLLocationDegrees实际上是双倍的，所以如何将其转换为double，以便我总是返回双精度，我可以将findAllLocalCountTotal参数更改为double而不是CLLocationDegrees？

if(self.lastKnownLocation == nil ){
    double lat = [CLController sharedInstance].latitude;
    double lng = [CLController sharedInstance].longitude;

}else{
    CLLocationDegrees lat = self.lastKnownLocation.coordinate.latitude;
    CLLocationDegrees lng = self.lastKnownLocation.coordinate.longitude;
}

NSNumber *tempInt = self.lastPostsGrabbedCounter;



//Make call to get data with lat lng
self.webServiceAllCount = [Post findAllLocalCountTotal:(CLLocationDegrees)lat withLong:(CLLocationDegrees)lng];

Answer 1

只需使用强制转换，并将变量声明移到if之外 - if＆amp; else分支是不同的范围，并引入了自己的变量：

double lat, lng;
if(self.lastKnownLocation == nil)
{
   lat = [CLController sharedInstance].latitude;
   lng = [CLController sharedInstance].longitude;
}
else
{
   lat = (double)self.lastKnownLocation.coordinate.latitude;
   lng = (double)self.lastKnownLocation.coordinate.longitude;
}

Answer 2

这个主题可以帮到你吗？ cllocationdegrees