Question

我有一个任务就是使用map-kit开发应用程序我从服务器和一个引脚获得多个引脚我必须从用户当前位置删除。该用户当前定位引脚应为绿色＆amp;来自服务器的其他引脚应该是另一种颜色。我怎么能这样做？

另一个问题是我在彼此之间有一些别针，因为有纬度＆amp;经度有一些细微的差别。因此，在那个引脚将要彼此掉落的特定点上，我想给出一个按钮（在引脚弹出窗口上），它可以处理lat和amp;的微小差异。长引脚意味着按钮告诉下一个引脚＆amp;一旦按下按钮，弹出窗口应该转到另一个尚未选择的按钮上。打开它的弹出窗口，它也会告诉下一个引脚。我怎么能这样做？

我正在使用这样的代码来创建pin

获取用户loacation pin

        Place* current = [[[Place alloc] init] autorelease];
    current.name = @"You are here.";
    current.latitude = coordinate.latitude;
    current.longitude = coordinate.longitude;
    PlaceMark *from = [[[PlaceMark alloc] initWithPlace:current] autorelease];              
    [mapView addAnnotation:from];

获取服务器位置引脚。

    int s=1;
    for (j=0 ; j < i - 1   ; j++) 
    {
        //points = [[NSString alloc] initWithFormat:@"point%d",s];
        reports = [NSArray arrayWithArray:lat];
        NSString *titles = [[NSString alloc] initWithFormat:@"%@",[tit objectAtIndex:j]];
        NSString *description = [[NSString alloc] initWithFormat:@"%@",[des objectAtIndex:j]];
        float latitude=[[lat objectAtIndex:j] floatValue];
        float longitude=[[lon objectAtIndex:j] floatValue];
        Place* home = [[[Place alloc] init] autorelease];
        home.name = [NSString stringWithFormat:@"%@",titles];
        home.description = [NSString stringWithFormat:@"%@",description];
        home.latitude = latitude;
        home.longitude = longitude;
        PlaceMark *from = [[[PlaceMark alloc] initWithPlace:home] autorelease];             [mapView addAnnotation:from];
        s++;
        [self centerMap];
    }

此代码用于创建弹出窗口。

- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation{
if (annotation == mapView.userLocation)
return nil;
MKPinAnnotationView *pin = (MKPinAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier: @"asdf"];
    if (pin == nil)
    pin = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier: @"asdf"] autorelease];
else
pin.annotation = annotation;
pin.userInteractionEnabled = YES;
UIButton *disclosureButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
[disclosureButton setFrame:CGRectMake(0, 0, 30, 30)];
pin.rightCalloutAccessoryView = disclosureButton;
pin.pinColor = MKPinAnnotationColorRed;
pin.animatesDrop = YES;
[pin setEnabled:YES];
[pin setCanShowCallout:YES];
return pin;}

此代码处理事件意味着pin正在调用按钮操作。

 - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{ nslog (do something)
}

我的所有代码都正常运行。我想回答上面给出的问题..请帮助我

Answer 1

回答第一个问题：

首先找到您的当前位置，请参阅THIS ANSWER所有评论但请使用以下代码执行此操作。

#pragma mark -
#pragma mark Location Manager functions

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{   NSLog(@"Inside Location Delegate"); 
/*NSString *val=[[NSString alloc] initWithFormat:@"Previous Location is:\n Lattitude : %f\n Longitude : %f \n\n Current location is :\n Lattitude : %f\n Longitude : %f",oldLocation.coordinate.latitude, oldLocation.coordinate.longitude,newLocation.coordinate.latitude, newLocation.coordinate.longitude];
NSLog(@"%@",val);*/
[self setMapCenter:newLocation.coordinate];

PlaceMark *addAnnotation = [[[PlaceMark alloc] initWithCoordinate:newLocation.coordinate] retain];
[addAnnotation setTitle:@"Your Location"];
[addAnnotation setSubTitle:@""];        
[self._mapView addAnnotation:addAnnotation];
userAnnoFlag = TRUE;

[self._mapView selectAnnotation:[[self._mapView annotations] lastObject] animated:YES];

[self.locationManager stopUpdatingLocation];
}

然后使用以下方法设置引脚：

#pragma mark -
#pragma mark Annotations Functions

- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation{
@try {
    MKPinAnnotationView *annView=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"MyPin"];  
    annView.animatesDrop=FALSE;
    annView.canShowCallout = YES;
    [annView setSelected:YES];
    if (userAnnoFlag == TRUE){
        annView.pinColor = MKPinAnnotationColorRed;
        userAnnoFlag = FALSE;
    }
    if ([mapView userLocation]) {
        annView.pinColor = MKPinAnnotationColorRed;
    }
    else{
        annView.pinColor = MKPinAnnotationColorGreen;
    }   
    annView.calloutOffset = CGPointMake(-5, 5); 
    return annView;
}
@catch (NSException * e) {      
}
@finally {      
}
return 0;
}

如果是您的第二个问题，您最好手动检查纬度和经度之间的差异，如果它有足够的差异（根据您的要求），则传递它。

如何处理多个引脚将在一个经度和下降处下降在iphone sdk中的纬度？

1 个答案: