Ios 获得;指示不可用“;使用URLWithString调用Google地图
我有一个非常成功地使用Apple Maps的应用程序:我有一个带有一些兴趣点的列表,如果我先点击其中一个,应用程序会在地图上显示它,然后,如果我点击它,它会打开Apple Maps应用程序进行导航 问题是,在第一次点击/启动应用程序时,它会打开Apple Maps,但如果它请求使用用户位置的权限,或者如果没有,Apple Maps都不会工作,并返回:“方向不可用。在这些位置之间找不到方向。”但通常情况下,我的应用程序的位置服务设置为打开 我认为我必须使用一种超时,因为我的应用程序解析导航数据(我从xml中检索数据)花费的时间太长,但在第二次点击时,一切正常,即使我在调试模式下从Mac上运行它(它甚至第二次解析xml) 我希望我解释得很好。有什么提示吗Ios 获得;指示不可用“;使用URLWithString调用Google地图,ios,google-maps,core-location,Ios,Google Maps,Core Location,我有一个非常成功地使用Apple Maps的应用程序:我有一个带有一些兴趣点的列表,如果我先点击其中一个,应用程序会在地图上显示它,然后,如果我点击它,它会打开Apple Maps应用程序进行导航 问题是,在第一次点击/启动应用程序时,它会打开Apple Maps,但如果它请求使用用户位置的权限,或者如果没有,Apple Maps都不会工作,并返回:“方向不可用。在这些位置之间找不到方向。”但通常情况下,我的应用程序的位置服务设置为打开 我认为我必须使用一种超时,因为我的应用程序解析导航数据(我
-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation
{
MKPinAnnotationView *pinView = nil;
if(annotation != mapView.userLocation)
{
static NSString *defaultPinID = @"com.invasivecode.pin";
pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil ) pinView = [[[MKPinAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];
pinView.pinColor = MKPinAnnotationColorRed;
UIButton *myAccessoryButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 24, 24)];
[myAccessoryButton setBackgroundColor:[UIColor clearColor]];
[myAccessoryButton setImage:[UIImage imageNamed:@"flag.png"] forState:UIControlStateNormal];
pinView.rightCalloutAccessoryView = myAccessoryButton;
pinView.canShowCallout = YES;
pinView.animatesDrop = YES;
[myAccessoryButton release];
}
else {
[mapView.userLocation setTitle:@"You're here"];
}
return pinView;
}
-(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.distanceFilter = kCLDistanceFilterNone;
[locationManager startUpdatingLocation];
CLLocation *location = [locationManager location];
// Configure the new event with information from the location
CLLocationCoordinate2D coordinate = [location coordinate];
NSString *latitude = [NSString stringWithFormat:@"%f", coordinate.latitude];
NSString *longitude = [NSString stringWithFormat:@"%f", coordinate.longitude];
CLLocationCoordinate2D start = { [latitude floatValue], [longitude floatValue] };
CLLocationCoordinate2D end = {[posto.latitude floatValue], [posto.longitude floatValue]};
NSString *googleMapsURLString = [NSString stringWithFormat:@"http://maps.google.com/?saddr=%1.6f,%1.6f&daddr=%1.6f,%1.6f", start.latitude, start.longitude, end.latitude, end.longitude];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:googleMapsURLString]];
}
-(MKAnnotationView*)地图视图:(MKMapView*)mV视图用于注释:(id)注释
{
MKPinAnnotationView*pinView=nil;
if(注释!=mapView.userLocation)
{
静态NSString*defaultPinID=@“com.invasivecode.pin”;
pinView=(MKPinAnnotationView*)[mapView出列重用AnnotationViewWithIdentifier:defaultPinID];
如果(pinView==nil)pinView=[[[MKPinAnnotationView alloc]
initWithAnnotation:annotation重用标识符:defaultPinID]autorelease];
pinView.pinColor=MKPinAnnotationColorRed;
UIButton*myAccessoryButton=[[UIButton alloc]initWithFrame:CGRectMake(0,0,24,24)];
[myAccessoryButton setBackgroundColor:[UIColor clearColor]];
[myAccessoryButton setImage:[UIImage ImageName:@“flag.png”]用于状态:UIControlStateNormal];
pinView.rightCalloutAccessoryView=myAccessoryButton;
pinView.canShowCallout=是;
pinView.animatesDrop=是;
[myAccessoryButton释放];
}
否则{
[mapView.userLocation setTitle:@“您在这里”];
}
返回pinView;
}
-(无效)地图视图:(MKMapView*)地图视图注释视图:(MKAnnotationView*)视图调用访问控制点击:(UIControl*)控制{
locationManager=[[CLLocationManager alloc]init];
locationManager.delegate=self;
locationManager.desiredAccuracy=KCallocationAccuracyBest;
locationManager.distanceFilter=KCLDistanceFilterOne;
[locationManager startUpdatingLocation];
CLLocation*location=[locationManager位置];
//使用来自位置的信息配置新事件
CLLocationCoordinate2D坐标=[位置坐标];
NSString*纬度=[NSString stringWithFormat:@“%f”,坐标.纬度];
NSString*经度=[NSString stringWithFormat:@“%f”,坐标.经度];
CLLocationCoordinate2D start={[纬度浮点值],[经度浮点值]};
CLLocationCoordinate2D end={[posto.latitude浮点值],[posto.latitude浮点值]};
NSString*googleMapsURLString=[NSString stringWithFormat:@”http://maps.google.com/?saddr=%1.6f,%1.6f&daddr=%1.6f,%1.6f“,开始.纬度,开始.经度,结束.纬度,结束.经度];
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:googleMapsURLString]];
}
在调用startUpdatingLocation
后,您立即使用[locationManager location]
开始查找当前位置后,位置通常不可用(如果是,则可能不可靠或过时)
当location
可用时,位置管理器将调用其didUpdateToLocation
委托方法,您应该在该方法中移动startUpdatingLocation
之后的所有代码
(即使在该委托方法中,最好在使用前检查newLocation
是否为nil
。地图视图在等待用户授予位置服务权限时有时会发生这种情况(请参阅))
您可能还想实施didFailWithError
来处理获取位置的任何问题,或者至少要知道它。我已经完成了您告诉我的更正,但现在该应用程序正确地请求使用用户位置的权限,进入一种循环:它从地图移动到应用程序,始终以DidUpdateLocation方法输入:我是否忘记管理某些内容?是的,我忘记提到:在调用openURL之前,执行[locationManager StopUpdateLocation]代码>否则,当它返回到您的应用程序时,它会再次更新位置并继续返回到“地图”应用程序。
-(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.distanceFilter = kCLDistanceFilterNone;
[locationManager startUpdatingLocation];
}
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
if (newLocation == nil)
{
NSLog(@"didUpdateToLocation: newLocation is nil");
return;
}
//May want to check newLocation.horizontalAccuracy and
//newLocation.timestamp to see if the location is accurate
//enough for you. If not, return and wait for a more
//accurate location (which may never come).
//all the code currently after "startUpdatingLocation" goes here...
CLLocation *location = [locationManager location];
...
}
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(@"locationManager:didFailWithError: %@", error);
}