如何找到MKMapView的当前缩放级别？ [英] how to find current zoom level of MKMapView?

问题描述

我想知道iphone编程中 MKMapView 的当前缩放级别，我该怎么做？
实际上我有一个应用程序，只需要几个参数（从中心到角落的 MKMapView ）正在返回商店详细信息，当我在 MKMapView ，半径非常高，当Radius较小时它会改变，所以我想知道缩放级别并根据它设置我的webservice，我怎样才能获得缩放级别当前 MKMapView 可见区域？

I want to know the current zoom level of MKMapView in iphone programming, how can I do that? Actually I have one app, that is taking few arguments(Radius from center to corner of MKMapView) are returning the store details in that are, when I am on MKMapView, the radius is very high and it changes when Radius is smaller, so I want to know the zoom level and setup my webservice according to that, How can I get zoom level of current MKMapView visible area?

推荐答案

您可以使用 span 在 MKMapView 的区域属性中。它的定义如下：

You can use span inside the region property of the MKMapView. It is defined like this:

typedef struct {
    CLLocationDegrees latitudeDelta;
    CLLocationDegrees longitudeDelta;
} MKCoordinateSpan;

看看documentation 。这里有很好的解释。

Take a look at the documentation. It is well explained there.

这篇关于如何找到MKMapView的当前缩放级别？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！