添加谷歌地图sdk为ios后我看不到地图

Question

我想在UIViewController上面添加一个谷歌地图。但除了我定义的一些标记外，我看不到任何东西。问题看起来像这样： 以下是相关代码：

- (void)viewDidLoad {
previousContext = [EAGLContext currentContext];
[super viewDidLoad];


GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.868
                                                        longitude:151.2086
                                                             zoom:10];

mapView_ = [GMSMapView mapWithFrame:CGRectMake(0, 0, 1136, 640) camera:camera];
//mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
mapView_.settings.compassButton = YES;
mapView_.settings.myLocationButton = YES;
mapView_.delegate = self;
// Listen to the myLocation property of GMSMapView.
[mapView_ addObserver:self
           forKeyPath:@"myLocation"
              options:NSKeyValueObservingOptionNew
              context:NULL];

[EAGLContext setCurrentContext: previousContext];

//add makers
CLLocationCoordinate2D position = CLLocationCoordinate2DMake(39.900285, 116.274020);
GMSMarker *marker = [GMSMarker markerWithPosition:position];
marker.title = @"aaa";
marker.snippet = @"population : 5";
marker.infoWindowAnchor = CGPointMake(0.5, 0.5);
marker.map = mapView_;
marker.icon = [UIImage imageNamed:@"tempmarker.png"];

CLLocationCoordinate2D position2 = CLLocationCoordinate2DMake(39.860285, 116.274020);
GMSMarker *marker2 = [GMSMarker markerWithPosition:position2];
marker2.title = @"bbb";
marker2.snippet = @"population : 5";
marker2.infoWindowAnchor = CGPointMake(0.5, 0.5);
marker2.map = mapView_;
marker2.icon = [UIImage imageNamed:@"tempmarker2.png"];



//add buttons:directRoom, rank, achievement, mission, home
....

[self.view insertSubview: mapView_ atIndex: 0];

[EAGLContext setCurrentContext:nil];
// Ask for My Location data after the map has already been added to the UI.
dispatch_async(dispatch_get_main_queue(), ^{
    mapView_.myLocationEnabled = YES;
});
}

那么，如何处理这个问题，非常感谢！

Answer 1

供参考，请参阅Google的演示（下方复制）。它与您发布的内容类似，但您可以尝试以下几点：

1. 确保您的API密钥有效且API可以获取磁贴
2. 检查您要插入的地图视图的z-index顺序：[self.view insertSubview: mapView_ atIndex: 0];插入其他所有内容。试试[self.view addSubview:mapView_]

演示代码，来自Google（https://developers.google.com/maps/documentation/ios/）：

#import <GoogleMaps/GoogleMaps.h>
#import "DemoViewController.h"

@implementation DemoViewController

- (void)viewDidLoad {
  [super viewDidLoad];
  GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.868
                                                          longitude:151.2086
                                                               zoom:6];
  GMSMapView *mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];

  GMSMarker *marker = [[GMSMarker alloc] init];
  marker.position = camera.target;
  marker.snippet = @"Hello World";
  marker.animated = YES;

  self.view = mapView;
}

@end

Answer 2

检查您是否已在应用代理中的didFinishLaunchingWithOption中正确输入了Google API密钥

[GMSServices provideAPIKey:@"yourGoogleAssignedSDKKeyGoesHere"];  

您的xcode应为4.5或更高版本