如何从MKCoordinateRegion的"我的"坐标开始？

Question

我想知道如何使这个代码工作:当我点击一个单元格时,我调用DetailViewController,这是一个坐标为旧金山的地图.但我的地图只显示"世界"地图,不要去我设置的地区,你知道我怎么能用"我的"坐标开始吗？

这是我的代码:

#import "DetailViewController.h"

@implementation DetailViewController

@synthesize mapView;

- (void) gotoLocation {
    NSLog(@"allo");

    //start off in San Francisco
    MKCoordinateRegion region;
    region.center.latitude = 37.786996;
    region.center.longitude = -122.440100;
    region.span.latitudeDelta = 0.112872;
    region.span.longitudeDelta = 0.109863;

    [self.mapView setRegion:region animated:YES];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    [self gotoLocation];
}

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

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

@end

谢谢

保罗

Answer 1

- (void)viewDidLoad{
[super viewDidLoad];

// define span for map: how much area will be shown
MKCoordinateSpan span;
span.latitudeDelta = 0.002;
span.longitudeDelta = 0.002;

// define starting point for map
CLLocationCoordinate2D start;
start.latitude = 37.786996;
start.longitude = 0.109863;

// create region, consisting of span and location
MKCoordinateRegion region;
region.span = span;
region.center = start;

// move the map to our location
[self.mapView setRegion:region animated:YES];

}