来自MapView注释iOS的缩略图图像

如何从mapView中获取缩略图，如下图中红色矩形框所示

UIView *thumbnailContainer=[[UIView alloc]initWithFrame:CGRectMake(10,10,64,64)];
    thumbnailContainer.clipsToBounds=YES;
    thumbnailContainer.layer.borderColor=[UIColor colorWithWhite:0 alpha:0.5].CGColor;
    thumbnailContainer.layer.cornerRadius=3;
    thumbnailContainer.layer.borderWidth=1;

    Annotation *annotation1=[[Annotation alloc]init];
    annotation1.coordinate = CLLocationCoordinate2DMake(29.7189214,-95.33916);
    annotation1.title = @"University of Houston";
    annotation1.subtitle = @"4800 Calhoun Rd,Houston";
    MKMapView *mapView2=[[MKMapView alloc]initWithFrame:CGRectMake(0, 0, 150, 150)];
    mapView2.userInteractionEnabled=NO;
    mapView2.centerCoordinate=[annotation1 coordinate];
    [mapView2 addAnnotation:annotation1];
    //annPoint=[self.mapView convertCoordinate:annotation1.coordinate toPointToView:self.mapView];

    MKCoordinateRegion region=MKCoordinateRegionMakeWithDistance(mapView2.centerCoordinate, 150, 150);
    mapView2.region=region;
    mapView2.transform=CGAffineTransformMakeScale(0.75, 0.75);
    mapView2.layer.position=CGPointMake(thumbnailContainer.bounds.size.width/2,thumbnailContainer.bounds.size.height/2+10);
    [thumbnailContainer addSubview:mapView2];

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很可能这是地图的截图，因为iOS中的任何实时地图都在下角包含谷歌地图徽标( 为了做到这一点，您需要计算出pin所在地图中的rect，然后使用UIGraphicsContent（）等函数对视图进行屏幕截图。然后您可以将该图像放入UIImageView中，以便用户可以显示该图像

UIGraphicsBeginImageContext(mapRect);    
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

或者，您可以使用GoogleMaps静态API，该API允许您使用指定的纬度和经度值在特定位置接收地图的图片

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使用缩小的地图视图怎么样？我不认为从地图视图的渲染层创建缩略图是一个好的解决方案，因为它需要首先以所需的缩放加载地图，然后，为什么不直接显示此地图而不是从中生成图像呢？：D这是我将使用的代码

    Annotation *yourAnnotation = [[Annotation alloc] init];

UIView *thumbnailContainer = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 64, 64)];
thumbnailContainer.clipsToBounds = YES;
thumbnailContainer.layer.borderColor = [UIColor colorWithWhite:0 alpha:0.5].CGColor;
thumbnailContainer.layer.cornerRadius = 3;
thumbnailContainer.layer.borderWidth = 1;

MKMapView *thumbnailMap = [[MKMapView alloc] initWithFrame:CGRectMake(0, 0, 150, 150)];
thumbnailMap.userInteractionEnabled = NO;
thumbnailMap.centerCoordinate = [yourAnnotation coordinate];
[thumbnailMap addAnnotation:yourAnnotation];

MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(thumbnailMap.centerCoordinate, 150, 150);
thumbnailMap.region = region;
thumbnailMap.transform = CGAffineTransformMakeScale(0.75, 0.75);
//we add 10 pixels on the y coordinate, to center the pin in the view. Moreover it will hide the "legal" label of the map view.
thumbnailMap.layer.position = CGPointMake(thumbnailContainer.bounds.size.width / 2, thumbnailContainer.bounds.size.height / 2 + 10);
[thumbnailContainer addSubview:thumbnailMap];

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看起来是这样的：

我已经修改了您发布的代码，但是我无法生成输出。请查看上面的代码。如果有任何帮助，将不胜感激。您正在使用的注释对象是什么？它是您创建的某类实际子类吗？在我的示例中，注释只是用来表示注释对象的。我想k静态地图许可证规定只能在网站上使用。当使用iOS5地图工具包创建此缩略图时，必须小心不要隐藏google徽标，否则您的应用程序可能会被拒绝。