如何在OS X中打印MKMapView？

Question

发送MKMapView a -print:消息会导致只包含+/-按钮和“合法”链接的输出。同样如果我尝试[NSPrintOperation printOperationWithView:someMKMapView]或[theWindowThatContainsAMapView print]或[[NSPrintOperation PDFOperationWithView:someMKMapView insideRect:someMKMapView.bounds toPath:@"foo.pdf" printInfo:nil] runOperation]。

苹果自己的Maps.app打印地图，顺便说一句。

有没有人设法打印MKMapView？

Answer 1

魔术类是MKMapSnapshotter

假设有一个MKMapView实例mapView，这是一个简单的例子来创建的MKMapView的当前内容作为写入夫特TIFF文件的图像。 此图像可打印。

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：

与打印，而不是创建一个文件

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()