iphone - 从 CLLocationDegrees 生成一个字符串，例如在 NSLog 或 StringWithFormat 中

Question

您好 Stacked 专家!

我的问题:如何从 CLLocationDegrees 值生成字符串？

失败的尝试:

1. NSLog(@"Value: %f", currentLocation.coordinate.latitude); //Tried with all NSLog specifiers.
2. NSNumber *tmp = [[NSNumber alloc] initWithDouble:currentLocation.coordinate.latitude];
3. NSString *tmp = [[NSString alloc] initWithFormat:@"%@", currentLocation.coordinate.latitude];

当我查看 CLLocationDegrees 的定义时，它清楚地表明这是一个 double 值:

typedef double CLLocationDegrees;

我在这里错过了什么？这让我发疯了......请帮我挽救一下!

提前致谢并致以最诚挚的问候。//放弃

Answer 1

这些是正确的:

NSLog(@"Value: %f", currentLocation.coordinate.latitude); //Tried with all NSLog specifiers.
NSNumber *tmp = [[NSNumber alloc] initWithDouble:currentLocation.coordinate.latitude];

这是错误的，因为 coordinate.latitude 不是 nsstring 可能期望的对象。

NSString *tmp = [[NSString alloc] initWithFormat:@"%@", currentLocation.coordinate.latitude];

如果你想要一个 NSString:

myString = [[NSNumber numberWithDouble:currentLocation.coordinate.latitude] stringValue];

或

NSString *tmp = [[NSString alloc] initWithFormat:@"%f", currentLocation.coordinate.latitude];

马可