在ios6中调用苹果地图用于导航 (地图开发)

ios6以下我们一般用google地图来导航，但ios6中调用会有点问题，会打开web浏览器再询问之类的，不直观友好。所以在ios6中建议直接用apple map。本来调用apple map应该和调用google map类似，但使用： http://maps.apple.com/maps?saddr=%f,%f&daddr=%f,%f 会提示无法定位，不知道为什么？使用maps://saddr=%f,%f&daddr=%f,%f 会找不到当前位置，也不清楚原因？不过还是找到了解决方法，如下（包括两种地图调用方式）：

if (SYSTEM_VERSION_LESS_THAN(@"6.0")) { // ios6以下，调用google map

NSString *urlString = [[NSString alloc]

initWithFormat:@"http://maps.google.com/maps?saddr=%f,%f&daddr=%f,%f&dirfl=d",

cutLat,cutLon,stationLat,stationLon];

NSURL *aURL = [NSURL URLWithString:urlString];

[urlString release];

[[UIApplication sharedApplication] openURL:aURL];

} else { // 直接调用ios自己带的apple map

CLLocationCoordinate2D to;

to.latitude = stationLat;

to.longitude = stationLon;

MKMapItem *currentLocation = [MKMapItem mapItemForCurrentLocation];

MKMapItem *toLocation = [[MKMapItem alloc] initWithPlacemark:[[[MKPlacemark alloc] initWithCoordinate:to addressDictionary:nil] autorelease]];

toLocation.name = @"Destination";

[MKMapItem openMapsWithItems:[NSArray arrayWithObjects:currentLocation, toLocation, nil]

launchOptions:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:MKLaunchOptionsDirectionsModeDriving, [NSNumber numberWithBool:YES], nil]

forKeys:[NSArray arrayWithObjects:MKLaunchOptionsDirectionsModeKey, MKLaunchOptionsShowsTrafficKey, nil]]];

[toLocation release];

}

记得加上：

#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)