先导入头文件
#import <CoreLocation/CoreLocation.h>
我之前写的 一直没有走定位的代理方法 然后最后找到 原因是在 Info.plist文件中加
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription 都设置为Boolean 值都为YES
@property (nonatomic,strong)CLLocationManager *locationManager;
@property (nonatomic,copy)NSString *cityName;
#pragma mark 定位
- (void)locate{
if (!self.locationManager)
{
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
self.locationManager.distanceFilter=1.0;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0)
{
[self.locationManager requestWhenInUseAuthorization];
}
[self.locationManager startUpdatingLocation];
} else {
[self.locationManager startUpdatingLocation];
}
}
#pragma mark - CoreLocation Delegate 实现定位协议回调方法
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
//此处locations存储了持续更新的位置坐标值,取最后一个值为最新位置,如果不想让其持续更新位置,则在此方法中获取到一个值之后让locationManager stopUpdatingLocation
CLLocation *currentLocation = [locations lastObject];
// 获取当前所在的城市名
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
//根据经纬度反向地理编译出地址信息
[geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *array, NSError *error)
{
if (array.count > 0)
{
CLPlacemark *placemark = [array objectAtIndex:0];
//获取城市
NSString *city = placemark.locality;
if (!city) {
//四大直辖市的城市信息无法通过locality获得,只能通过获取省份的方法来获得(如果city为空,则可知为直辖市)
city = placemark.administrativeArea;
}
self.cityName = city;
[manager stopUpdatingLocation];
}
else if (error == nil && [array count] == 0)
{
self.cityName=@"定位失败";
[self judgeLocationIsTure];
}
else if (error != nil)
{
self.cityName=@"定位失败";
}
}];
}
- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error {
if (error.code == kCLErrorDenied) {
self.cityName=@"定位失败";
// 提示用户出错原因,可按住Option键点击 KCLErrorDenied的查看更多出错信息,可打印error.code值查找原因所在
}
iOS定位功能实现
本文介绍如何在iOS应用中实现地理位置定位功能,包括设置CLLocationManager、请求权限、获取位置更新及反向地理编码来获取城市名称。
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