如何在 OS X 中打印 MKMapView？

Question

发送 MKMapView -print: 消息会导致输出仅包含 +/- 按钮和“合法”链接。如果我尝试 [NSPrintOperation printOperationWithView:someMKMapView] 或 [theWindowThatContainsAMapView print] 或 [[NSPrintOperation PDFOperationWithView:someMKMapView insideRect:someMKMapView.bounds toPath:@"foo.pdf" printInfo:nil] runOperation] 也是一样。

Apple 自己的 Maps.app 确实会打印地图，顺便说一句。

有人设法打印出 MKMapView 吗？

Answer 1

魔术班是MKMapSnapshotter

假设有一个MKMapView 实例mapView，这是一个简单的示例，用于将MKMapView 的当前内容的图像创建为用Swift 编写的TIFF 文件。 此图片可打印。

let options = MKMapSnapshotOptions()
options.region = mapView.region;
options.size = mapView.frame.size;

let fileURL = NSURL(fileURLWithPath:"/path/to/snapshot.tif")
let mapSnapshotter = MKMapSnapshotter(options: options)
mapSnapshotter.startWithCompletionHandler { (snapshot, error) -> Void in
  // do error handling
  let image = snapshot.image
  if let data = image.TIFFRepresentation {
    data.writeToURL(fileURL!, atomically:true)
  } else {
    println("could not create TIFF data")
  }
}

编辑：

打印而不是创建文件

let options = MKMapSnapshotOptions()
options.region = mapView.region;
options.size = mapView.frame.size;

let mapSnapshotter = MKMapSnapshotter(options: options)
mapSnapshotter.startWithCompletionHandler { (snapshot, error) -> Void in
  // do error handling
  let image = snapshot.image
  let imageView = NSImageView()
  imageView.frame = NSRect(origin: NSZeroPoint, size: image.size)
  imageView.image = image

  let info = NSPrintInfo.sharedPrintInfo()
  info.horizontalPagination = .FitPagination
  info.verticalPagination = .FitPagination
  let operation = NSPrintOperation(view: imageView, printInfo:info)
  operation.showsPrintPanel = true
  operation.runOperation()