我的目标是从 ios 应用程序打开带有方向的地图应用程序，我可以打开地图应用程序，但它没有显示方向，我编写的代码如下
NSString *mystr=[[NSString alloc] initWithFormat:@"http://maps.apple.com/maps?saddr=Current+Location&daddr=Newyork"];
NSURL *myurl=[[NSURL alloc] initWithString:mystr];
[[UIApplication sharedApplication] openURL:myurl];
任何人都可以帮我弄清楚如何将参数传递到此网址和任何其他网址吗？
CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(self.location.latitude,self.location.longitude);
//create MKMapItem out of coordinates
MKPlacemark* placeMark = [[MKPlacemark alloc] initWithCoordinate:coordinate addressDictionary:nil];
MKMapItem* destination = [[MKMapItem alloc] initWithPlacemark:placeMark];
if([destination respondsToSelector:@selector(openInMapsWithLaunchOptions:)])
{
//using iOS6 native maps app
if(_mode == 1)
{
[destination openInMapsWithLaunchOptions:@{MKLaunchOptionsDirectionsModeKey:MKLaunchOptionsDirectionsModeWalking}];
}
if(_mode == 2)
{
[destination openInMapsWithLaunchOptions:@{MKLaunchOptionsDirectionsModeKey:MKLaunchOptionsDirectionsModeDriving}];
}
if(_mode == 3)
{
[destination openInMapsWithLaunchOptions:@{MKLaunchOptionsDirectionsModeKey:MKLaunchOptionsDirectionsModeTransit}];
}
} else{
//using iOS 5 which has the Google Maps application
NSString* url = [NSString stringWithFormat: @"http://maps.google.com/maps?saddr=Current+Location&daddr=%f,%f", self.location.latitude, self.location.longitude];
[[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]];
}
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