当方向设置为“横向”时，UIPrintInteractionController会追加空白页

我尝试使用发送字符串到打印机，UIMarkupTextPrintFormatter并且当我不更改页面方向时一切都很好-默认情况下设置为纵向。

但是，当我将页面方向设置为横向时，一个空白页面会附加到渲染的输出中，就像边距超出了第一页一样。

这是我的打印代码：

let printController = UIPrintInteractionController.sharedPrintController()

let printInfo = UIPrintInfo(dictionary: nil)
printInfo.jobName = "Print Job"
printInfo.orientation = .Landscape
printController.printInfo = printInfo

let formatter = UIMarkupTextPrintFormatter(markupText: "Welcome")
formatter.contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
printController.printFormatter = formatter

printController.presentAnimated(true, completionHandler: nil)

要注意的另一件事是，当页面设置为横向时，Xcode会记录一些与自动布局有关的错误。

the behavior of the UICollectionViewFlowLayout is not defined because:
the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.
The relevant UICollectionViewFlowLayout instance is <UICollectionViewFlowLayout: 0x7fa066097850>, and it is attached to <UICollectionView: 0x7fa06687f800; frame = (0 0; 375 313.5); clipsToBounds = YES; opaque = NO; autoresize = W+H; gestureRecognizers = <NSArray: 0x7fa066095e90>; layer = <CALayer: 0x7fa066098b30>; contentOffset: {0, 0}; contentSize: {666, 313.5}> collection view layout: <UICollectionViewFlowLayout: 0x7fa066097850>.
Make a symbolic breakpoint at UICollectionViewFlowLayoutBreakForInvalidSizes to catch this in the debugger.
the behavior of the UICollectionViewFlowLayout is not defined because:
the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.
The relevant UICollectionViewFlowLayout instance is <UICollectionViewFlowLayout: 0x7fa066097850>, and it is attached to <UICollectionView: 0x7fa06687f800; frame = (0 0; 375 313.5); clipsToBounds = YES; opaque = NO; autoresize = W+H; gestureRecognizers = <NSArray: 0x7fa066095e90>; layer = <CALayer: 0x7fa066098b30>; contentOffset: {0, 0}; contentSize: {666, 313.5}> collection view layout: <UICollectionViewFlowLayout: 0x7fa066097850>.
Make a symbolic breakpoint at UICollectionViewFlowLayoutBreakForInvalidSizes to catch this in the debugger.
Unbalanced calls to begin/end appearance transitions for <UIViewController: 0x7fa066085830>.
the behavior of the UICollectionViewFlowLayout is not defined because:
the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.
The relevant UICollectionViewFlowLayout instance is <UICollectionViewFlowLayout: 0x7fa063c55130>, and it is attached to <UICollectionView: 0x7fa064043000; frame = (0 0; 375 313.5); clipsToBounds = YES; opaque = NO; autoresize = W+H; gestureRecognizers = <NSArray: 0x7fa063c4a720>; layer = <CALayer: 0x7fa063c26e60>; contentOffset: {0, 0}; contentSize: {666, 313.5}> collection view layout: <UICollectionViewFlowLayout: 0x7fa063c55130>.
Make a symbolic breakpoint at UICollectionViewFlowLayoutBreakForInvalidSizes to catch this in the debugger.
the behavior of the UICollectionViewFlowLayout is not defined because:
the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.
The relevant UICollectionViewFlowLayout instance is <UICollectionViewFlowLayout: 0x7fa063c55130>, and it is attached to <UICollectionView: 0x7fa064043000; frame = (0 0; 375 313.5); clipsToBounds = YES; opaque = NO; autoresize = W+H; gestureRecognizers = <NSArray: 0x7fa063c4a720>; layer = <CALayer: 0x7fa063c26e60>; contentOffset: {0, 0}; contentSize: {666, 313.5}> collection view layout: <UICollectionViewFlowLayout: 0x7fa063c55130>.
Make a symbolic breakpoint at UICollectionViewFlowLayoutBreakForInvalidSizes to catch this in the debugger.

我尝试仅打印第一页，但是找不到有关设置页面范围的任何信息，可以设置UIMarkupTextPrintFormatter一个startPage变量，但是设置它并不算运，即使将其设置为第二页，它也会呈现出原来的样子。没有设置任何东西。

我可以通过摆脱空白页或将打印范围设置为仅第1页来解决此问题，但到目前为止，我什么都做不完。有任何想法吗？