Ở đây bạn có thể hiển thị vị trí hiện tại với các chi tiết chú thích
trong ViewController.h
#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
//My
#import <MapKit/MapKit.h>
#import <MessageUI/MFMailComposeViewController.h>
@interface ViewController : UIViewController<CLLocationManagerDelegate,MKMapViewDelegate,MFMailComposeViewControllerDelegate>
{
IBOutlet UILabel *lblLatitiude;
IBOutlet UILabel *lblLongitude;
IBOutlet UILabel *lblAdress;
}
//My
@property (nonatomic, strong) IBOutlet MKMapView *mapView;
-(IBAction)getMyLocation:(id)sender;
@end
trong ViewController.m
#import "ViewController.h"
@interface ViewController()
@end
@implementation ViewController{
CLLocationManager *locationManager;
CLGeocoder *geocoder;
CLPlacemark *placemark;
}
@synthesize mapView;
- (void)viewDidLoad
{
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
geocoder = [[CLGeocoder alloc] init];
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
NSMutableDictionary *defaultsDictionary = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"[email protected]", @"fromEmail",
@"[email protected]", @"toEmail",
@"smtp.gmail.com", @"relayHost",
@"[email protected]", @"login",
@"[email protected]", @"pass",
[NSNumber numberWithBool:YES], @"requiresAuth",
[NSNumber numberWithBool:YES], @"wantsSecure", nil];
[userDefaults registerDefaults:defaultsDictionary];
self.mapView.delegate=self;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Custom Methods
-(IBAction)getMyLocation:(id)sender{
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(@"didFailWithError: %@", error);
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[errorAlert show];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(@"didUpdateToLocation: %@", newLocation);
CLLocation *currentLocation = newLocation;
if (currentLocation != nil) {
lblLongitude.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
lblLatitiude.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
}
// Stop Location Manager
[locationManager stopUpdatingLocation];
// Reverse Geocoding
NSLog(@"Resolving the Address");
[geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *placemarks, NSError *error) {
NSLog(@"Found placemarks: %@, error: %@", placemarks, error);
if (error == nil && [placemarks count] > 0) {
placemark = [placemarks lastObject];
lblAdress.text = [NSString stringWithFormat:@"%@ %@\n%@ %@\n%@\n%@",
placemark.subThoroughfare, placemark.thoroughfare,
placemark.postalCode, placemark.locality,
placemark.administrativeArea,
placemark.country];
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(currentLocation.coordinate, 800, 800);
[self.mapView setRegion:[self.mapView regionThatFits:region] animated:YES];
// Add an annotation
MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
point.coordinate = currentLocation.coordinate;
point.title = @"Where am I?";
point.subtitle = [NSString stringWithFormat:@"%@ %@\n%@ %@\n%@\n%@",
placemark.subThoroughfare, placemark.thoroughfare,
placemark.postalCode, placemark.locality,
placemark.administrativeArea,
placemark.country];
[self.mapView addAnnotation:point];
} else {
NSLog(@"%@", error.debugDescription);
}
} ];
}
//My
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKAnnotationView *annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"loc"];
annotationView.canShowCallout = YES;
annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
return annotationView;
}
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
[self getSignScreenShot];
MFMailComposeViewController* controller = [[MFMailComposeViewController alloc] init];
controller.mailComposeDelegate = self;
[controller setSubject:@"My Subject"];
[controller setMessageBody:@"Hello there." isHTML:NO];
if (controller) [self presentModalViewController:controller animated:YES];
}
- (void)mailComposeController:(MFMailComposeViewController*)controller
didFinishWithResult:(MFMailComposeResult)result
error:(NSError*)error;
{
if (result == MFMailComposeResultSent) {
NSLog(@"It's away!");
}
[self dismissModalViewControllerAnimated:YES];
}
//-----------------------------------------------------------------------------------
//This methos is to take screenshot of map
//-----------------------------------------------------------------------------------
-(UIImage *)getSignScreenShot
{
CGRect rect = CGRectMake(self.mapView.frame.origin.x,self.mapView.frame.origin.y-50,self.mapView.frame.size.width+60,self.mapView.frame.size.height+15);
UIGraphicsBeginImageContextWithOptions(self.mapView.frame.size, NO, 1.0);
[self.mapView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
CGImageRef imageRef = CGImageCreateWithImageInRect([screenshot CGImage], rect);
UIImage *newImage = [UIImage imageWithCGImage:imageRef];
return newImage;
}
Nhưng phương pháp này không còn trả lại vị trí hiện tại nữa. Im sử dụng Xcode 6. Nhưng nó đã làm việc tốt khi sử dụng Xcode 5. – SARATH