扮演替身？

发布于 2024-10-21 08:57:14 字数 680 浏览 6 评论 0原文

我怎样才能将某些东西变成双倍？ CLLocationDegrees 实际上是一个双精度数，那么我如何将其转换为双精度数，以便我的 if 始终返回双精度数，并且我可以将 findAllLocalCountTotal 参数更改为双精度数而不是 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];

原文

How can I turn or maybe cast something to a double? CLLocationDegrees is really a double so how do I cast it as double so my if always returns doubles and I can change my findAllLocalCountTotal params to double instead of 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];

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自由范儿 2024-10-28 08:57:14

只需使用强制转换并将变量声明移到 if 之外 - if & else 分支是不同的作用域，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;
}

Just use a cast and also move the variable declaration outside of the if - the if & else branches are distinct scopes and introduced their own variables:

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;
}

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