我正在尝试实施一个单独的类来管理我的位置。每当我点击一个按钮时,我想获取我的位置。
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,因为我希望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。我认为一些变量是自动释放的,但我不确定,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
我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。
答案 0 :(得分:2)
您的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
}
进一步将desiredAccuracy
设置为CLLocationAccuracyBest
。
答案 1 :(得分:2)
委托方法必须命名为locationManager:didUpdateToLocation:fromLocation:
和locationManager:didFailWithError:
。
您无法使用gpsManager:didUpdateToLocation:fromLocation:
等自定义方法名称。
另请注意,自iOS 6起,locationManager:didUpdateToLocation:fromLocation:
已弃用,您应使用locationManager:didUpdateLocations:
。