iOS谷歌地图SDK：设置maxZoom级别问题

我注意到，当我将“示例”的“最大缩放级别”设置为19时，缩放将上升到20。我不知道为什么。 它总是比我设置的缩放级别多1个缩放级别

GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:23.589571946369546
                                                        longitude:58.14204730042655
                                                             zoom:16];

self.mapView_.camera=camera;
self.mapView_.myLocationEnabled = YES;


self.mapView_.mapType = kGMSTypeHybrid;
self.mapView_.settings.compassButton = YES;
[self.mapView_ setMinZoom:5 maxZoom:19];



// Creates a marker in the center of the map.
GMSMarker *marker = [[GMSMarker alloc] init];
marker.position = CLLocationCoordinate2DMake(23.168520, 58.008163);

marker.map = self.mapView_;
// ------ add layer
// Implement GMSTileURLConstructor
// Returns a Tile based on the x,y,zoom coordinates, and the requested floor
GMSTileURLConstructor urls = ^(NSUInteger x, NSUInteger y, NSUInteger zoom) {
    NSString *url = [NSString stringWithFormat:@"http://www.example.com/%tu/%tu/%tu.png", zoom, x, y];
    NSLog(@"url=%@",url);
    return [NSURL URLWithString:url];
};

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你怎么知道maxZoom是20？您使用哪个版本的iOS地图SDK

我使用iOS Maps SDK 1.9.1版尝试了Google Maps的Github页面中的示例，并将下面的代码放入videDidLoad（）方法中。它将打印正确的最大缩放比例，即19

GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:23.589571946369546
                                                            longitude:58.14204730042655
                                                                 zoom:16];

    mapView_.camera=camera;
    mapView_.myLocationEnabled = YES;

    mapView_.mapType = kGMSTypeHybrid;
    mapView_.settings.compassButton = YES;

    // Create the GMSMapView with the camera position.
    mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];

    [mapView_ setMinZoom:5 maxZoom:19];

    NSLog(@"max zoom: %f", mapView_.maxZoom);

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谢谢@ztan。。。让我再检查一下。也许我搞错了。我又在think link上发布了同样的问题。。请检查。。。