Objective c 如何设置pin'；s在用户上的位置'；现在在哪里？ /.h文件 #进口 #进口 #进口 @接口MapMain:UIViewController { MKMapView*mapView； CLLocationManager*locationManager； } @属性（非原子，保留）IBMMapView*mapView； -（iAction）GetLocation:（id）发送方； -（iAction）设置PIN:（id）发送方； @结束 //代码在.m之内 -（无效）viewDidLoad { self.mapView.showsUserLocation=是； self.mapView.delegate=self； [self.mapView setUserTrackingMode:MKUserTrackingModeFollow-animated:YES]； //加载视图后执行任何其他设置。 locationManager=[[CLLocationManager alloc]init]； locationManager.distanceFilter=KCLDistanceFilterOne；//无论何时移动 locationManager.desiredAccuracy=KCallocationAccuracyHundredMeters；//100米 [locationManager startUpdatingLocation]； } -（NSString*）设备位置{ 返回[NSString stringWithFormat:@“纬度：%f经度：%f”，locationManager.location.coordinate.latitude，locationManager.location.coordinate.longitude]； } -（iAction）设置PIN:（id）发送方 { NSLog（@“%@，[自设备定位]）； Pin*newPin=[[Pin alloc]init]； newPin.coordinate= newPin.title=@“title Tester”； newPin.subtitle=@“子测试仪”； [self.mapView addAnnotation:newPin]； }

在“Set Pin”中，我想将newPin的坐标设置为用户的当前位置。我找到了函数“deviceLocation”，但不知道如何在我的SetPin函数中调用和使用它

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请帮忙

在MKMapView.h的

MKMapViewDelegate

部分中查看以下方法

//.h file
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
@interface MapMain : UIViewController <MKMapViewDelegate>
{
MKMapView *mapView;
CLLocationManager *locationManager;
}

@property (nonatomic, retain) IBOutlet MKMapView *mapView;

-(IBAction)GetLocation:(id)sender;
-(IBAction)SetPin:(id)sender;

@end

//code within .m

- (void)viewDidLoad
{
self.mapView.showsUserLocation = YES;
self.mapView.delegate = self;
[self.mapView setUserTrackingMode:MKUserTrackingModeFollow animated:YES];
// Do any additional setup after loading the view.
locationManager = [[CLLocationManager alloc] init];
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters; // 100 m
[locationManager startUpdatingLocation];

}


-(NSString *)deviceLocation {
return [NSString stringWithFormat:@"latitude: %f longitude: %f",    locationManager.location.coordinate.latitude, locationManager.location.coordinate.longitude];
}


-(IBAction)SetPin:(id)sender
{
NSLog(@"%@", [self deviceLocation]);

Pin *newPin = [[Pin alloc]init];
newPin.coordinate = 
newPin.title = @"Title Tester";
newPin.subtitle = @"Sub Tester";
[self.mapView addAnnotation:newPin];

}

特别是

mapView:didUpdateUserLocation:

从那里，您可以获得用户位置并为内容设置注释

- (void)mapViewWillStartLocatingUser:(MKMapView *)mapView NS_AVAILABLE(10_9, 4_0);
- (void)mapViewDidStopLocatingUser:(MKMapView *)mapView NS_AVAILABLE(10_9, 4_0);
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation NS_AVAILABLE(10_9, 4_0);
- (void)mapView:(MKMapView *)mapView didFailToLocateUserWithError:(NSError *)error NS_AVAILABLE(10_9, 4_0);