您如何设置范围:nsrangepointer in Swift中的NSView Knowpagerange中的nsran

Question

我正在尝试使用knowsPageRange函数在NSView中设置印刷页面的数量。如何正确设置范围：nsrangepointer？

override func knowsPageRange(_ range: NSRangePointer) -> Bool {
    let printOperation = NSPrintOperation.current!
    let printInfo: NSPrintInfo = printOperation.printInfo
    // Where can I draw?
    pageRect = printInfo.imageablePageBounds
    let newFrame = NSRect(origin: CGPoint(), size: printInfo.paperSize)
    frame = newFrame
    // Construct the range to return
    var rangeOut = NSRange(location: 0, length: 0)
    // Pages are 1-based. That is, the first page is 1.
    rangeOut.location = 1
    rangeOut.length = 10 // Number of pages
    // Return the newly constructed range, rangeOut, via the range pointer
    range.memory = rangeOut // Cannot assign to property: 'range' is a 'let' constant
    return true
}

Answer 1

简单地更改：

range.memory = rangeOut

to：

range.pointee = rangeOut

pointee的使用来自Swift3。memory来自Swift 2。