将CLLocationCoordinate2D类型转换为数字或字符串 [英] converting a CLLocationCoordinate2D type to number or string

问题描述

我想知道如何将CLLocationCoordinate2D的纬度和经度值转换为数字或字符串值。
Iver尝试了几种不同的方式，但是他们不工作：

  CLLocationCoordinate2D centerCoord; 
 centerCoord.latitude = self.locModel.userLocation.coordinate.latitude; 
 centerCoord.longitude = self.locModel.userLocation.coordinate.longitude; 
 NSString * tmpLat = [[NSString alloc] initWithFormat：@％g，centerCoord.latitude]; 
 NSString * tmpLong = [[NSString alloc] initWithFormat：@％g，centerCoord.longitude]; 
 
 NSLog（用户的纬度为：％@，tmpLat）; 
 NSLog（用户的经度是：％@，tmpLong）; 
  

这会返回编译器发出的警告。

警告是

 警告：从不兼容的指针类型传递NSLog的参数1 
  
 
 
 
如何做到这一点？
 
 
 
任何帮助将不胜感激。 p> 
 
 
感谢
解决方案
你没有提到警告，很可能是因为您忘记了NSLog字符串前面的 @ ：
  NSLog（@用户的纬度是：％f，self.locModel.userLocation.coordinate.latitude）; 
 NSLog（@用户的经度是：％f，self.locModel.userLocation.coordinate.longitude）; 
  
您更新的代码应为：
  NSLog（@用户的纬度是：％@，tmpLat）; 
 NSLog（@用户的经度是：％@，tmpLong）; 
  
 NSLog需要一个NSString参数，需要@符号。没有@符号，字符串是一个纯C字符串而不是NSString对象。
 
I was wondering how to convert latitude and longitude values of CLLocationCoordinate2D to numbers or string values.
Iver tried a few different ways but they arene't working:
CLLocationCoordinate2D centerCoord;
centerCoord.latitude = self.locModel.userLocation.coordinate.latitude ;
centerCoord.longitude = self.locModel.userLocation.coordinate.longitude; 
NSString *tmpLat = [[NSString alloc] initWithFormat:@"%g", centerCoord.latitude];
NSString *tmpLong = [[NSString alloc] initWithFormat:@"%g", centerCoord.longitude];

NSLog("User's latitude is: %@", tmpLat);
NSLog("User's longitude is: %@", tmpLong);
This returns a warning by the compiler.

The warning is
warning: passing argument 1 of 'NSLog' from incompatible pointer type
How do I do this?

Any help would be appreciated.

thanks
解决方案
You haven't mentioned what the warning is but it's most likely because you forgot the @ in front of the NSLog strings:
NSLog(@"User's latitude is: %f", self.locModel.userLocation.coordinate.latitude );
NSLog(@"User's longitude is: %f", self.locModel.userLocation.coordinate.longitude );
Your updated code should be:
NSLog(@"User's latitude is: %@", tmpLat);
NSLog(@"User's longitude is: %@", tmpLong);
NSLog expects an NSString parameter which needs an @ sign in front.  Without the @ sign, the string is a plain C string not an NSString object.

                        
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