iphone - 将 nsnumber 或 nsstring 放入 initWithLatitude :

Question

我也被困住了，我也很愚蠢，我正在尝试将 NSString 或 NSNumber 放入 的 initWithLatitude >CLLocation。如果有人能提供帮助，那就太好了。

代码如下

CLLocation *location1 = [[CLLocation alloc] initWithLatitude:53.778702 longitude:-0.271887];
CLLocation *location2 = [[CLLocation alloc] initWithLatitude:53.683267 longitude:-0.011330];
label.text = [NSString stringWithFormat:@"Distance in miles: %4.1f", [location1 distanceFromLocation:location2]/1609.344]; 
[location1 release];

我正在尝试将 [[CLLocation alloc] initWithLatitude:53.778702 longitude:-0.271887] 替换为 [[CLLocation alloc] initWithLatitude:lat longitude:lon]

Answer 1

CLLocationDegrees 是一个double，所以你可以

[[CLLocation alloc] initWithLatitude:[someNSNumber doubleValue] longitude:[someNSString doubleValue]];