GMSMarker iOS问题

时间:2014-05-08 07:49:27

标签: ios google-maps google-maps-api-3 gmsmapview

我使用此代码在Google Map for iOS上创建标记。

self.mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
    self.mapView.myLocationEnabled = YES;
    self.mapView.accessibilityElementsHidden = NO;
    self.mapView.frame = self.view.bounds;
    self.mapView.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    self.mapView.delegate = self;
    self.mapView.settings.myLocationButton = YES;
    [self.view addSubview:self.mapView];

GMSMarker *marker = [[GMSMarker alloc] init];
marker.position = CLLocationCoordinate2DMake(-33.86, 151.20);
marker.map = self.mapView;

但我需要标记看起来像这样:

enter image description here

我知道如何使用Apple Map,但我需要使用Google Map(因为在某些城市Apple Map几乎没有显示任何内容)。

对于谷歌地图,我发现只有这样的代码:

marker.icon = image; // image from xib file

所以我需要为xib为每个标记创建图像。我会有很多标记,所以可能采用这种方法我会得到记忆警告。

有人知道更好的方法来实现这样的标记吗?

4 个答案:

答案 0 :(得分:9)

由于GMSMarker只允许将UIImage设置为图标,我实现了类似这样的东西: (它在Swift中,但对于Objective C来说概念是相同的)

var gasView = UIView(frame:CGRectMake(0, 0, 30, 37))
//Add Label
var lblPrecio = UILabel(frame: CGRectMake(0, 37-18, 30, 10))
lblPrecio.text = "hello"
lblPrecio.textAlignment = NSTextAlignment.Center
gasView.addSubview(lblPrecio)
//Add Logo
var logo = UIImageView(frame: CGRectMake(30-23, 2, 16, 16))
logo.image = UIImage(named: "Logo")
gasView.addSubview(logo)
//Add Callout Background Image
gasView.backgroundColor = UIColor(patternImage: UIImage(named: "Callout")!)

marker.icon = imageFromView(gasView)

函数imageFromView如下:

private func imageFromView(aView:UIView) -> UIImage {
    if(UIScreen.mainScreen().respondsToSelector("scale")) {
        UIGraphicsBeginImageContextWithOptions(aView.frame.size, false, UIScreen.mainScreen().scale)
    }
    else {
        UIGraphicsBeginImageContext(aView.frame.size)
    }
    aView.layer.renderInContext(UIGraphicsGetCurrentContext())
    var image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return image
}

希望这有帮助。

答案 1 :(得分:0)

据我所知,这是唯一的方法。但您可以遵循Google的最佳做法,了解如何限制Google地图上的标记以防止内存或性能问题。请阅读https://developers.google.com/maps/articles/toomanymarkers以便更好地理解。

答案 2 :(得分:0)

好的,按照这个例子,实现你想要的东西非常简单:

  • 声明uiimageview
  • 声明第二个图像视图(你想要出现在游戏中,在这种情况下是b& w中的女孩)
  • 因此,将第二张图像添加为第一张图像的子视图
  • 现在你可以将第一张图片添加到marker.icon =(这里是第一张图片!!);

希望这可以帮到你。

答案 3 :(得分:0)

 Set the color to your marker first and then camera position to that coordinate, So that whenever your app will start it redirect to that coordinate

 marker.icon = [UIColor redColor];
 GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] initWithPath:< CLLocationCoordinate2DMake>];
        [self.mapView animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds withPadding:10.0f]];
        bounds=nil;
    GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] initWithPath:path];
            [self.mapView animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds withPadding:0.0f]];
            bounds=nil;