在objective-c中创建CLLocation对象

Question

我可以通过提供下面的纬度和经度来初始化CLLocation对象：

CLLocation *location =  [[CLLocation alloc] initWithLatitude:-43.242534 longitude:-54.93662];

如何初始化CLLocation对象不仅具有纬度和经度，还具有精度值？

Answer 1

根据apple docs，您可以使用以下函数：

double desired_horizontal_accuracy = 200.0 // in meters
double desired_vertical_accuracy = 200.0 // in meters
[[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(-43.242534,-54.93662)
                              altitude:-1
                    horizontalAccuracy:desired_horizontal_accuracy
                      verticalAccuracy:desired_vertical_accuracy
                             timestamp:[NSDate date]]

在示例中，对于参数altitude和timestamp ，我将与苹果文档所说的相同的默认值用于-initWithLatitude:longitude: