我一直在关注本教程http://www.devfright.com/ios-6-core-location-tutorial/,以便为我的ios应用添加位置服务。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testFileViewController.m中我添加了ViewDidLoad(记得要实现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下面:
//fail to find location, handle error
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)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)locationManager:(CLLocationManager *)manager didUpdateToLocation: (CLLocation *)newLocation fromLocation:(CLLocation *)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,以便从控制台确定是否正在调用这些函数,但是并未调用didFailWithError和didUpdateToLocation。
是的我知道didUpdateToLocation已弃用/过时,我将其替换为didUpdateLocations但它仍然无效,因此我将其更改回来。
如何让我的locationManager开始更新当前位置并以字符串的形式返回坐标值,以便稍后在我的应用中使用?感谢。
答案 0 :(得分:1)
使您的类成为CLLocationManagerDelegate的委托。
@interface TestFileViewController : UIViewController <UITableViewDelegate,UITableViewDataSource, NSStreamDelegate, **CLLocationManagerDelegate**>
然后将委托设置为自己。
我还建议创建一个单独的类来处理位置。清洁设计。
还要确保在主线程上调用startUpdatingLocation。
dispatch_sync(dispatch_get_main_queue(), ^{
});
答案 1 :(得分:0)
如果你正在使用IOS 8,你应该做一些事情,以使CLlocationManager正常工作。 你有一个NSLocationAlwaysUsageDescriptionadded添加到您的应用程序info.plist文件?你有两个在模拟器中设置位置? (调试 - &GT;位置)。第三,你必须要求额外的授权才能在ios8中使用核心位置。
if ([locationManager respondsToSelector:@selector(requestAlwaysAuthorization)])
[locationManager requestAlwaysAuthorization];