在主视图以外的视图中使用Google Maps SDK [英] Using the Google Maps SDK in views other than the main view

问题描述

我正在尝试在故事板中创建的主视图的子视图中使用iOS版Google Maps SDK，并通过IBOutlet(我将其称为UIView的子类，称为ExtraView)链接到视图控制器.当我按照SDK入门指南中的步骤进行操作时，SDK可以正常工作，但是它使用了层次结构中最不需要的视图(主视图)，这是我所不希望的.我希望地图位于屏幕的较小部分，并将屏幕的其余部分用于其他内容.当我尝试将mapView_对象(请参阅入门指南)分配给self.extraView而不是self.view时，整个屏幕都是黑色的，并且在控制台输出中出现错误:

I am trying to use the Google Maps SDK for iOS in a subview of the main view which I created in the storyboard and linked to the view controller via an IBOutlet (I called it extraView, subclassed from UIView). When I follow the steps in the SDK getting started guide, the SDK works just fine, but it uses the uppermost view in the hierarchy (the main view), which I don't want. I want my map to be in a smaller portion of the screen and use the rest of the screen for something else. When I attempt to assign the mapView_ object (see the getting started guide) to self.extraView instead of self.view, the whole screen is black and I get an error in the console output:

应用程序窗口应在应用程序启动结束时具有根视图控制器"

"Application windows are expected to have a root view controller at the end of application launch"

还有其他人知道吗?我在文档中找不到任何内容，并且Google提供的示例代码未使用情节提要.

Has anyone else figured this out? I can't find anything in the documentation and the sample code Google provides does not use a storyboard.

推荐答案

这是...

• 将UIView添加到您正在工作的视图控制器中
• 在身份检查器中将其类设置为GMSMapView.

然后像其他任何出口一样，将其拖动到代码中.

Then control-drag it to your code as you would for any other outlet.

您可以在其设置器中惰性地实例化它...

You can lazily instantiate it in its setter...

- (void) setMapView:(GMSMapView *)mapView {
    if (!mapView) {
        mapView = [[GMSMapView alloc] initWithFrame:mapView.bounds];
    }
    _mapView = mapView;
}

要显示地图，Google的示例代码将变为...

To display a map Google's sample code becomes...

  GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:1.285
                                                          longitude:103.848
                                                               zoom:12];
  self.mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];

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