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ios - 斯威夫特:试图打印“双面” UIPrintInfo.Duplex.longEdge 但不工作
我正在尝试在 iOS 应用程序中打印 PDF 双面,设置 printInfo.duplex = UIPrintInfo.Duplex.longEdge,但是当我使用 UIPrintInteractionController 打印时它被忽略