ios - CoreLocation 管理器不更新位置

Question

我试图实现一个单独的类来管理我的位置。每当我单击按钮时，我都想获得我的位置。
gpsFilter.h

#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>

@interface gpsFilter : NSObject <CLLocationManagerDelegate>

@property (nonatomic, retain) CLLocationManager *gpsManager;
@property (nonatomic, retain) NSString * latitude;
@property (nonatomic, retain) NSString * longitude;
@end

gpsFilter.m .

#import "gpsFilter.h"

@implementation gpsFilter

- (id) init{
self = [super init];
if(self != nil){
    self.gpsManager = [[CLLocationManager alloc] init];
    self.gpsManager.delegate = self;
    [self.gpsManager startUpdatingLocation];
    BOOL enable = [CLLocationManager locationServicesEnabled];
    NSLog(@"%@", enable? @"Enabled" : @"Not Enabled");
}
return self;
}

- (void)gpsManager:(CLLocationManager *) manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
NSLog(@"didUpdateToLocation: %@", newLocation);
CLLocation *currentLocation = newLocation;
if(currentLocation != nil){
    self.latitude = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
    self.longitude = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
}
}

- (void)gpsManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(@"didFailWithError: %@", error);
}
@end

我正在使用一个单独的类，因为我想在将来添加平滑过滤器。我没有得到任何更新。 NSLog 永远不会被触发。我认为某些变量正在自动释放，但我不确定是哪一个。

viewController 代码如下。

#import "gpstestViewController.h"

@interface gpstestViewController (){

}

@end

@implementation gpstestViewController


- (void)viewDidLoad
 {
[super viewDidLoad];
self.location = [[gpsFilter alloc] init];
// Do any additional setup after loading the view, typically from a nib.
}


- (IBAction)getloca:(id)sender {
self.latitudeLabel.text = [self.location latitude];
self.longitudeLabel.text = [self.location longitude];

}

- (IBAction)getLocation:(id)sender {
self.latitudeLabel.text = [self.location latitude];
self.longitudeLabel.text = [self.location longitude];

}
@end

很抱歉，我倾倒了很多代码，但我是 ios 编程的新手，我无法找到问题所在。

编辑:根本没有调用 updateLocation 委托(delegate)方法。

Answer 1

委托(delegate)方法必须命名为 locationManager:didUpdateToLocation:fromLocation:和 locationManager:didFailWithError: .

您不能使用自定义方法名称，如 gpsManager:didUpdateToLocation:fromLocation: .

另请注意 locationManager:didUpdateToLocation:fromLocation:自 iOS 6 起已弃用，您应使用 locationManager:didUpdateLocations: .