Question

可能重复：
How to trigger a video when a user reaches a certain location?

Hey Guys我试图在用户进入特定位置时触发音频文件，并使地图放大到他所在的位置..即使我有代码

 [worldView setRegion:region animated:YES];

地图似乎没有移动..

当用户位于具有特定时间和经度的位置时，如何触发音频文件.. ??

这是我的CoreLocationController.h目标c类

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

extern const CLLocationAccuracy kCLLocationAccuracyBest;
@protocol CoreLocationControllerDelegate 
@required
- (BOOL)startRegionMonitoring;
- (void)locationUpdate:(CLLocation *)location; // Our location updates are sent here
- (void)locationError:(NSError *)error; // Any errors are sent here
@end

@interface CoreLocationController : NSObject <CLLocationManagerDelegate, MKMapViewDelegate>      {
CLLocationManager *locMgr;
CLLocationCoordinate2D coordinate;
IBOutlet MKMapView *worldView;
IBOutlet UIActivityIndicatorView *activityIndicator;
id delegate;
} 

@property (nonatomic, retain) CLLocationManager *locMgr;
@property (nonatomic, assign) id delegate;
@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

@end

这是CorelocationController.m

#import "CoreLocationController.h"


@implementation CoreLocationController
@synthesize locMgr, delegate, coordinate;

- (id)init {
    self = [super init];

    if(self != nil) {
        self.locMgr = [[[CLLocationManager alloc] init] autorelease]; // Create new instance of locMgr
        self.locMgr.delegate = self; // Set the delegate as self.

        [locMgr setDistanceFilter:kCLDistanceFilterNone];
        [locMgr setDesiredAccuracy:kCLLocationAccuracyBest];

        [worldView setShowsUserLocation:YES];
    }

    return self;
}

- (BOOL)startRegionMonitoring {

    if (![CLLocationManager regionMonitoringAvailable] || ![CLLocationManager regionMonitoringEnabled] )
        return NO;
    CLLocationCoordinate2D home;
    home.latitude = +51.49410630;
    home.longitude = -0.10251360;

    CLRegion * region = [[CLRegion alloc] initCircularRegionWithCenter:home radius:10.0 identifier:@"home"];
    if (locMgr == nil)
        locMgr = ([[CLLocationManager alloc] init]);
    [locMgr startMonitoringForRegion:region desiredAccuracy:kCLLocationAccuracyBest];

    [region release];
    return YES;
}

- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region{
    NSLog(@"Enteed location");
//  [self leavingHomeNotify];
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Location entered" message:@"Region entered" delegate:NULL cancelButtonTitle:@"OK" otherButtonTitles:NULL];
    [alert show];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    if([self.delegate conformsToProtocol:@protocol(CoreLocationControllerDelegate)]) {  // Check if the class assigning itself as the delegate conforms to our protocol.  If not, the message will go nowhere.  Not good.
        [self.delegate locationUpdate:newLocation];

    }
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    if([self.delegate conformsToProtocol:@protocol(CoreLocationControllerDelegate)]) {     // Check if the class assigning itself as the delegate conforms to our protocol.  If not, the message will go nowhere.  Not good.
        [self.delegate locationError:error];
    }
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Location failed" message:@"Location failed" delegate:NULL cancelButtonTitle:@"OK" otherButtonTitles:NULL];
    [alert show];
}
     - (void)dealloc {
    [self.locMgr release];
    [super dealloc];
}


@end

这是CoreLocationDemoViewer.h

#import <UIKit/UIKit.h>
#import "CoreLocationController.h"
#import <MapKit/MapKit.h>

@interface CoreLocationDemoViewController : UIViewController <CoreLocationControllerDelegate, MKMapViewDelegate> {
    CoreLocationController *CLController;
    IBOutlet UILabel *locLabel;
    MKMapView *worldView;

}

@property (nonatomic, retain) CoreLocationController *CLController;
@property (nonatomic, retain) IBOutlet UILabel *locLabel;
@property (nonatomic, retain) MKMapView *worldView;

@end

这是CoreLocationDemoViewer.m

#import "CoreLocationDemoViewController.h"


@implementation CoreLocationDemoViewController
@synthesize CLController;
@synthesize locLabel;
@synthesize worldView;


- (void)viewDidLoad {
    [super viewDidLoad];
    self.worldView.mapType = MKMapTypeStandard;   // also MKMapTypeSatellite or MKMapTypeHybrid
    CLController = [[CoreLocationController alloc] init];
    CLController.delegate = self;
    [CLController.locMgr startUpdatingLocation];


    worldView.zoomEnabled = YES;
    worldView.scrollEnabled = YES;


}
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)u
{
    CLLocationCoordinate2D loc = [u coordinate];
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(loc, 250, 250);
    [worldView setRegion:region animated:YES];
}



- (void)locationUpdate:(CLLocation *)location {
    locLabel.text = [location description];
//  [mapView setCenterCoordinate:location.coordinate];
//  [mapView setShowsUserLocation:YES];

    CLLocationCoordinate2D coord = [location coordinate];

    // Add it to the map view
//    [worldView addAnnotation:mp];

    // MKMapView retains its annotations, we can release
//  [mp release];

    // Zoom the region to this location
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(coord, 50, 50);
    [worldView setRegion:region animated:YES];

//   [locationManager stopUpdatingLocation];    
}

- (void)locationError:(NSError *)error {
    locLabel.text = [error description];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

// The designated initializer.  Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
/*
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization.
    }
    return self;
}
*/

/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];
}
*/

/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations.
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/



- (void)viewDidUnload {
    [super viewDidUnload];
     self.worldView = nil;

    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [CLController release];
    [worldView release];
    [super dealloc];
}

@end

好吧这就是我想要的..现在它显示了一个带有用户位置的地图位置管理器显示标签中的当前位置，但我不认为它与mapview进行通信..我可以这样做吗？这就是放大不起作用的原因吗？

非常感谢你的帮助..

子视图的层次结构

0 个答案: