OGeek|极客世界-中国程序员成长平台

标题: ios - CLLocation Manager startUpdatingLocation 未启动 [打印本页]

作者: 菜鸟教程小白    时间: 2022-12-12 23:46
标题: ios - CLLocation Manager startUpdatingLocation 未启动

我一直在关注本教程 http://www.devfright.com/ios-6-core-location-tutorial/将位置服务添加到我的 ios 应用程序。我已经在我的 TestFileViewController.h 文件中导入了 Corelocation,如下所示:

 #import <UIKit/UIKit.h>
 #import <FacebookSDK/FacebookSDK.h>
 #import <CoreLocation/CoreLocation.h>

 @interface TestFileViewController : UIViewController <UITableViewDelegate,UITableViewDataSource, NSStreamDelegate>

 @property (nonatomic, strong) CLLocationManager *locationManager;

 @end

然后在我添加的testFileViewController.m ViewDidLoad中(记得实现CLLocationManagerDelegate):

//start checking for location from CoreLocation Framework (currently not working)
if ([CLLocationManager locationServicesEnabled])
{
    NSLog(@"location services enabled");
    _locationManager = [[CLLocationManager alloc] init];
    _locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    _locationManager.delegate = self;
    [_locationManager startUpdatingLocation];
};

}

(条件 CLLocationManager 执行 true 和 NSLogs)然后在 ViewDidLoad 正下方:

    //fail to find location, handle error
    - (void)locationManagerCLLocationManager *)manager didFailWithErrorNSError         *)error
     {
      NSLog(@"didFailWithError: %@", error);
      UIAlertView *errorAlert = [[UIAlertView alloc]
                           initWithTitle"Error" message"Failed to Get Your Location"    delegate:nil cancelButtonTitle"OK" otherButtonTitles:nil];
       [errorAlert show];
      }

      //show found location, return NSLOG for proof
      - (void)locationManagerCLLocationManager *)manager didUpdateToLocation:            (CLLocation *)newLocation fromLocationCLLocation *)oldLocation
      {
      NSLog(@"Made it to location Manager");
      CLLocation *location = [locationManager location];

      CLLocationCoordinate2D coordinate = [location coordinate];

      NSLog(@"%f",coordinate.latitude);
      }

我添加了 NSLogs 作为标记来从控制台确定函数是否被调用,但是 didFailWithError 和 didUpdateToLocation 都没有被调用。

是的,我知道 didUpdateToLocation 已弃用/过时,我将其替换为 didUpdateLocations,但它仍然无法正常工作,因此我将其改回。

如何让我的 locationManager 开始更新当前位置并以字符串形式返回坐标值,以便稍后在我的应用程序中使用?谢谢。



Best Answer-推荐答案


让您的类(class)成为 CLLocationManagerDelegate 的代表。

@interface TestFileViewController : UIViewController <UITableViewDelegate,UITableViewDataSource, NSStreamDelegate, **CLLocationManagerDelegate**>

然后将delegate设置为self。

我还建议创建一个单独的类来处理位置。更简洁的设计。

还要确保您在主线程上调用 startUpdatingLocation。

dispatch_sync(dispatch_get_main_queue(), ^{ 

});

关于ios - CLLocation Manager startUpdatingLocation 未启动,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24685446/






欢迎光临 OGeek|极客世界-中国程序员成长平台 (http://sqlite.in/) Powered by Discuz! X3.4