NSOutlineViewDataSource_Extensions.DraggingSessionWillBegin 方法       
定义
重要
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[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.MacOSX, 10, 7, ObjCRuntime.PlatformArchitecture.All, null)]
public static void DraggingSessionWillBegin(this AppKit.INSOutlineViewDataSource This, AppKit.NSOutlineView outlineView, AppKit.NSDraggingSession session, CoreGraphics.CGPoint screenPoint, Foundation.NSArray draggedItems);
	static member DraggingSessionWillBegin : AppKit.INSOutlineViewDataSource * AppKit.NSOutlineView * AppKit.NSDraggingSession * CoreGraphics.CGPoint * Foundation.NSArray -> unit
	参数
- outlineView
 - NSOutlineView
 
- session
 - NSDraggingSession
 
- screenPoint
 - CGPoint
 
- draggedItems
 - NSArray
 
- 属性