Question

Hello Stacked-Experts！

我的问题：如何从CLLocationDegrees值生成字符串？

尝试失败：

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，它清楚地表明这是双重的：

typedef double CLLocationDegrees;

我在这里缺少什么？这让我发疯了...请帮忙拯救我的心灵！

提前致谢并致以最诚挚的问候。 // Abeansits

Answer 1

这些都是正确的：

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

Answer 2

Swift版本：

纬度到字符串：

var latitudeText = "\(currentLocation.coordinate.latitude)"

或

let latitudeText = String(format: "%f", currentLocation.coordinate.latitude)

Answer 3

Obj-C格式

[[NSString alloc] initWithFormat:@"%f", coordinate.latitude];

快速格式

String(format: "%f", coordinate.latitude)

从CLLocationDegrees生成字符串，例如在NSLog或StringWithFormat中

3 个答案: