如何像这样为 NSTableCellView 拖放

Question

我正在尝试为 NSTableCellView 实现拖放，看起来像屏幕截图，但我唯一能做的就是文本，而不是像下面的屏幕截图那样的整个单元格:(

Answer 1

The Dragged Image

The image that is dragged in a dragging session is simply an image that represents the data on the pasteboard. Although a dragging destination can access the image, its primary concern is with the pasteboard data that the image represents—the dragging operation that a destination ultimately performs is on the pasteboard data, not on the image itself.

见Custom drag image with NSTableView as drag source

Answer 2

这是我对问题的回答:)

NSView 到 NSImage：link

覆盖 NSTableCellView 子类中的 draggingImageComponents

-(NSArray *) draggingImageComponents{
    self.layer.opacity = 0.5;
    NSImage *image = [self imageRepresentation];
    self.layer.opacity = 1;

    NSDraggingImageComponent *draggingImage = [NSDraggingImageComponent draggingImageComponentWithKey:@"background"];
    draggingImage.contents = image;
    draggingImage.frame = self.bounds;
    return @[draggingImage];
}

如何像这样为 NSTableCellView 拖放

How to make a drag & drop for NSTableCellView like this

macos

cocoa

objective-c

nstablecellview