NSWindow支持Drag-and-Drop

在NSView中，通过registerForDraggedTypes:来支持Drag-and-Drop。

[self registerForDraggedTypes:@[NSColorPboardType, NSFilenamesPboardType]];

对于NSWindow，通过awakeFromNib来支持Drag-and-Drop

@interface ONMainWindow () <NSDraggingDestination> @end @implementation ONMainWindow - (void)awakeFromNib {     [self registerForDraggedTypes:@[NSFilenamesPboardType]]; } #PRagma mark - NSDraggingDestination // 拖放显示图标 - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender {     return NSDragOperationCopy; } - (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender {     return NSDragOperationCopy; } // 拖放操作 - (BOOL)performDragOperation:(id<NSDraggingInfo>)sender {     NSPasteboard *pboard = [sender draggingPasteboard];     NSArray *filenames = [pboard propertyListForType:NSFilenamesPboardType];          if (1 == filenames.count) {         if ([[NSApp delegate] respondsToSelector:@selector(application:openFile:)]) {             return [[NSApp delegate] application:NSApp openFile:[filenames lastObject]];         }     }     return NO; }

我们在MainWindow.xib中，把Window设置为ONMainWindow。

然后，拖放文件到Windows窗口上，就可以再performDragOperation:中收到我们拖放的文件名或文件路径。

[0] __NSCFString * @"/Volumes/Info/Library/Developer/Shared/Documentation/DocSets/com.apple.adc.documentation.AppleOSX10.9.CoreReference.docset/Contents/Resources/Documents/samplecode/CocoaDragAndDrop/Listings" 0x0000608000185480