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。
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/
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