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在 OS X sierra 10.12 中，拖放不能与 NSTabView 一起正常工作。拖放似乎只适用于 TabView 的标签而不是整个选项卡..您可以在以下项目示例中看到...下载代码 或在这里是代码：-我已经创建了NSTabView的子类 AppMainTabSet 并在 Interface Builder 中将此类用作 TabView 的自定义类.....

 #import "AppMainTabSet.h"

@implementation AppMainTabSet


- (id)initWithCoder:(NSCoder *)coder
{
    /*------------------------------------------------------
     Init method called for Interface Builder objects
     --------------------------------------------------------*/
    self=[super initWithCoder:coder];
    if ( self ) {



    }
    return self;
}

- (void)awakeFromNib{

       [self registerForDraggedTypes:[NSArray arrayWithObject:NSFilenamesPboardType]];

    }


-(NSDragOperation) draggingEntered:(id < NSDraggingInfo >)sender
{
    NSLog(@"Hello Hello....draggingEntered");
    return NSDragOperationGeneric;
}




- (void)draggingExited:(id <NSDraggingInfo>)sender {
     NSLog(@"**** draggingExited*****");

}

- (BOOL) prepareForDragOperation:(id <NSDraggingInfo>)sender {
     NSLog(@"Hello Hello....prepareForDragOperation");
    return YES;
}



- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
{

    NSLog(@"Hello Hello....performDragOperation");

    return YES;
}

- (void)concludeDragOperation:(id <NSDraggingInfo>)sender {
   NSLog(@"Hello Hello....concludeDragOperation");

    [[NSCursor arrowCursor] push];
    [self setNeedsDisplay:YES];
}

- (BOOL) processNSDraggingInfo:(id <NSDraggingInfo>)sender {


   NSLog(@"Hello Hello....processNSDraggingInfo");

    return YES;
}
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