添加 google map sdk for ios 后我看不到地图答案

【问题标题】：I can't see map after adding google map sdk for ios添加 google map sdk for ios 后我看不到地图
【发布时间】：2014-06-13 23:51:00
【问题描述】：

我想在 UIViewController 上方添加一个谷歌地图。但除了我定义的一些标记外，我什么都看不到。问题看起来像这样：这是相关代码：

- (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！

【问题讨论】：

标签： ios objective-c google-maps google-maps-sdk-ios

【解决方案1】：

有关参考，请参阅 Google 的演示（复制如下）。它与您发布的内容相似，但您可以尝试以下几种方法：

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

【讨论】：

【解决方案2】：

检查您是否在您的应用委托的didFinishLaunchingWithOption 中正确输入了google API 密钥

[GMSServices provideAPIKey:@"yourGoogleAssignedSDKKeyGoesHere"];

您的 xcode 应该是 4.5 或更高版本

【讨论】：