【打开文件】案例二：已打开A文档切换到首页或其他页签，再拖拽到dock栏，未跳转到A阅读页面

PDF Office/PDF Master/Class/Document/KMMainDocument.swift

@@ -667,6 +667,21 @@ typealias KMMainDocumentCloudUploadHanddler = (@escaping(Bool, String)->()) -> (
                 self.mainViewController?.password = password as String?
             }
         }
+        
+        
+        //如果已存在，开个存在页签
+        var selectDocument: KMMainDocument? = self
+        if selectDocument != nil {
+            if selectDocument?.browser != nil {
+                let currentIndex = selectDocument?.browser.tabStripModel.index(of: selectDocument)
+                selectDocument?.browser.tabStripModel.selectTabContents(at: Int32(currentIndex!), userGesture: true)
+                if (selectDocument?.browser.window.isVisible)! as Bool {
+                    selectDocument?.browser.window.orderFront(nil)
+                } else if (selectDocument?.browser.window.isMiniaturized)! as Bool {
+                    selectDocument?.browser.window.orderFront(nil)
+                }
+            }
+        }
     }
     
     func tryToUnlockDocument(_ document: CPDFDocument) {