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放大我得到了同樣的問題在下面這樣描述的問題：谷歌地圖 - 讓專線跟隨街道地圖時，在
（路由行不繼街頭，當我放大）
MapKit - Make route line follow streets when map zoomed in
和
Route drawing on Google Maps for iOS not following the street lines
，但似乎沒有哪個SOLV任何回答編輯提到的問題。
我通過下面的函數加入指向我的GMSMapView中圖：
-(void) addPointToMap:(CLLocationCoordinate2D) coordinate
{
CLLocationCoordinate2D position = CLLocationCoordinate2DMake(
coordinate.latitude,
coordinate.longitude);
GMSMarker *marker = [GMSMarker markerWithPosition:position];
marker.map = mapView_;
[waypoints_ addObject:marker];
NSString *positionString = [[NSString alloc] initWithFormat:@"%f,%f",
coordinate.latitude,coordinate.longitude];
[waypointStrings_ addObject:positionString];
if([waypoints_ count]>1){
NSString *sensor = @"false";
NSArray *parameters = [NSArray arrayWithObjects:sensor, waypointStrings_,
nil];
NSArray *keys = [NSArray arrayWithObjects:@"sensor", @"waypoints", nil];
NSDictionary *query = [NSDictionary dictionaryWithObjects:parameters
forKeys:keys];
MDDirectionService *mds=[[MDDirectionService alloc] init];
SEL selector = @selector(addDirections:);
[mds setDirectionsQuery:query
withSelector:selector
withDelegate:self];
}
}
，這裏是setDirectionsQuery功能：
static NSString *kMDDirectionsURL = @"http://maps.googleapis.com/maps/api/directions/json?";
- (void)setDirectionsQuery:(NSDictionary *)query withSelector:(SEL)selector
withDelegate:(id)delegate{
NSArray *waypoints = [query objectForKey:@"waypoints"];
NSString *origin = [waypoints objectAtIndex:0];
int waypointCount = [waypoints count];
int destinationPos = waypointCount -1;
NSString *destination = [waypoints objectAtIndex:destinationPos];
NSString *sensor = [query objectForKey:@"sensor"];
NSMutableString *url =
[NSMutableString stringWithFormat:@"%@&origin=%@&destination=%@&sensor=%@",
kMDDirectionsURL,origin,destination, sensor];
if(waypointCount>2) {
[url appendString:@"&waypoints=optimize:true"];
int wpCount = waypointCount-2;
for(int i=1;i<wpCount;i++){
[url appendString: @"|"];
[url appendString:[waypoints objectAtIndex:i]];
}
}
url = [url
stringByAddingPercentEscapesUsingEncoding: NSASCIIStringEncoding];
_directionsURL = [NSURL URLWithString:url];
[self retrieveDirections:selector withDelegate:delegate];
}
注：我已經遵循了這一谷歌教程，並修改了它一點點：
https://www.youtube.com/watch?v=AdV7bCWuDYg
預先感謝，任何幫助將不勝感激！