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iap2-location-checker's Introduction

iAP2-location-checker

Check where iOS Location data comes from real world or from an iAP2-protocol device

可以检测iOS设备的坐标数据来源于系统数据源,或是来源于iAP2协议的外设数据源

usage 用法

#import "LocationDataSource.h"
LocationDataSource datasource =  [location dataSource];

typedef enum : NSUInteger {
    // 真实世界数据源
    LocationDataSourceRealWorld,
    // 外设数据源
    LocationDataSourceMFIDevice,
    // 拔掉外设,在坐标尚未恢复情况下有一定概率坐标精度会恢复正常,但此时horizontalAccuracy 数值会变得很大。
    // 这种情况下也可以认定当前坐标不能反映真实世界坐标
    LocationDataSourceLowAccuracy,
} LocationDataSource;

theory 原理

通过苹果iAP2协议产生的坐标系统,海拔精度会被苹果限制在0.1m,经纬度精度限制到小数点后8-9位。

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