ios Location 获取坐标

http://api.map.baidu.com/lbsapi/getpoint/   获取 经纬度 

 If the NSLocationAlwaysUsageDescription key is not specified in your

 *      Info.plist, this method will do nothing, as your app will be assumed not

 *      to support Always authorization

.

NSLocationAlwaysUsageDescription

- (void)requestAlwaysAuthorization __OSX_AVAILABLE_STARTING(__MAC_NA, __IPHONE_8_0);