在objective-c中創建CLLocation對象

Question

我可以通過提供下面的緯度和經度來初始化CLLocation對象：

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

如何初始化CLLocation對象不僅具有緯度和經度，還具有精度值？

Answer 1

根據apple docs，您可以使用以下函數：

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，對於參數altitude和timestamp ，我將與蘋果文檔所說的相同的默認值用於-initWithLatitude:longitude: