iOS Google maps sdk - 使用子视图而不是主视图时未指向标记

Question

尝试在“位置”位置显示带有标记的简单 Google 地图。

如果 mapview_ 显示在 self.view（控制器的默认视图）而不是 GMSMapView 类的 gmapsView（self.view 的子视图）中，则一切正常。

我浏览了 SO 上的一些帖子，但无法解决问题。 在 Interface builder gmapsview 类中设置为 GMSMapView。

相机位置设置

 CLLocationCoordinate2D position = CLLocationCoordinate2DMake(
                                                             37.778376,
                                                             -122.409853);
CLLocation *currentLocation = [[CLLocation alloc] initWithLatitude:position.latitude longitude:position.longitude];
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:position.coordinate.latitude
                                                        longitude:position.coordinate.longitude
                                                             zoom:13];  

地图设置

mapView_ = [GMSMapView mapWithFrame:self.gmapsView.frame camera:camera];
mapView_.delegate = self;
self.gmapsView.camera = camera; //gmapsView is a view of class GMSMapView

CGRect rect = self.locationBlockView.frame;

self.gmapsView.delegate = self; //Added to check whether it works
self.gmapsView = mapView_;  

设置标记

GMSMarker *marker = [GMSMarker markerWithPosition:position]; //Adding Marker
marker.map = mapView_;
[mapView_ animateToLocation:position.coordinate];

Answer 1

重新初始化地图是导致问题的原因。一旦它被删除，它就解决了这个问题。但是重新初始化 GMSMapView 会导致问题吗？这是一个荒谬的事情，但它解决了这个问题。

CLLocationCoordinate2D position = CLLocationCoordinate2DMake(
                                                             12.778376,
                                                             -122.409853);
currentLocation = [[CLLocation alloc] initWithLatitude:position.latitude longitude:position.longitude];
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:eventLocation.coordinate.latitude
                                                        longitude:eventLocation.coordinate.longitude
                                                             zoom:13];
//[self.gmapsView removeFromSuperview];//removing the subview
//self.gmapsView = [GMSMapView mapWithFrame:self.gmapsView.frame camera:camera];
//self.gmapsView.delegate = self;

//self.gmapsView = self.gmapsView; //set map

// [self.view addSubview:self.gmapsView];//Adding back did the magic
self.gmapsView.delegate = self; //set delegate
self.gmapsView.camera = camera; //set camera

GMSMarker *marker = [GMSMarker markerWithPosition:position]; //Adding Marker
marker.map = self.gmapsView;
[self.gmapsView animateToLocation:currentLocation.coordinate];

Answer 2

将 Google 地图添加到子视图

解决步骤

1) 将故事中 UIView 的类更改为 GMSMapVIew。

2) 接下来我为绿色的 UIView 容器创建了一个 IBOutlet 并连接了它。

#import <UIKit/UIKit.h>
#import <GoogleMaps/GoogleMaps.h>

@interface CarLocationViewController : UIViewController  
//An outlet of type GMSMapView
@property (strong, nonatomic) IBOutlet GMSMapView *mapContainerView;
@end

3) 然后在我看来确实加载了我做了以下操作

- (void)viewDidLoad {
    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.86
                                                            longitude:151.20
                                                                 zoom:14];

    GMSMarker *marker = [[GMSMarker alloc] init];
    marker.position = CLLocationCoordinate2DMake(-33.86, 151.20);
    marker.title = @"Sydney";
    marker.snippet = @"Australia";
    marker.map = self.mapContainerView;

    //set the camera for the map
    self.mapContainerView.camera = camera;

    self.mapContainerView.myLocationEnabled = YES;

}

我正在关注此链接http://www.ryanwright.me/cookbook/ios/obj-c/maps/gmap/subview