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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 委托方法。

4

2 回答 2

2

委托方法必须命名为locationManager:didUpdateToLocation:fromLocation:and locationManager:didFailWithError:。

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


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

于 2013-02-13T16:47:28.067 回答
2

你的 didUpdateToLocation 的签名是错误的：这是我的代码：

/** Delegate method from the CLLocationManagerDelegate protocol. */
- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation 
           fromLocation:(CLLocation *)oldLocation    
{
  // here do 
}

进一步设置desiredAccuracy为CLLocationAccuracyBest。

于 2013-02-13T16:37:56.923 回答