他们是否有任何方式使应用程序能够将项目放入垃圾箱。现在我将项目从 NSTableView 拖放到 NSTableView 和 NSOutlineView。
我在这里只有一个问题How to enable drop something on the Trash in Objective-c? 但不会发生丢弃到垃圾箱的情况。当我拖动项目大纲应用程序时,我得到 NSDragOperation 的 0。提前感谢您的帮助。
他们是否有任何方式使应用程序能够将项目放入垃圾箱。现在我将项目从 NSTableView 拖放到 NSTableView 和 NSOutlineView。
我在这里只有一个问题How to enable drop something on the Trash in Objective-c? 但不会发生丢弃到垃圾箱的情况。当我拖动项目大纲应用程序时,我得到 NSDragOperation 的 0。提前感谢您的帮助。
For dropping outside the location on your machine use the below DataSource methods:-
- (BOOL)tableView:(NSTableView *)tv writeRows:(NSArray*)rows toPasteboard:(NSPasteboard*)pboard
{
NSArray* entityArray=[yourArrayController selectedObjects];
NSString* filename=[[[entityArray objectAtIndex:0]valueForKey:@"fileName"]stringValue];
[pboard setPropertyList:[NSArray arrayWithObject:filename] forType:(NSString*)kPasteboardTypeFileURLPromise];
NSPoint dragPosition;
NSRect imageLocation;
NSEvent *theEvent = [NSApp currentEvent];
dragPosition = [tv convertPoint:[theEvent locationInWindow] fromView: nil];
dragPosition.x -= 16;
dragPosition.y -= 16;
imageLocation.origin = dragPosition;
imageLocation.size = NSMakeSize(32,32);
[tv dragPromisedFilesOfTypes:[NSArray arrayWithObject:@"*"]
fromRect:imageLocation
source:self
slideBack:YES
event:theEvent];
return YES;
}
//For Enabled the Dropping and Extracting the File Path. This method will give you exact path
- (NSArray *)namesOfPromisedFilesDroppedAtDestination:(NSURL *)dropDestination
{
NSString *str=[dropDestination path];
NSLog(@"%@",str);
NSMutableArray *rootDraggedItemsNames = nil;
return rootDraggedItemsNames;
}
//When Drag Files accepted to the Destination, then it Start Download the Files. This will accept the file drops on the destination
- (void)draggedImage:(NSImage *)anImage endedAt:(NSPoint)aPoint operation:(NSDragOperation)operation
{
[[NSPasteboard pasteboardWithName:NSDragPboard] declareTypes:[NSArray arrayWithObject:(NSString*)kPasteboardTypeFileURLPromise] owner:self];
}
The below method is for registering the file promises
-(void)setAcceptDrops:(BOOL)acceptDrops
{
if (acceptDrops)
{
[tableView registerForDraggedTypes: [NSArray arrayWithObjects:(NSString*)kPasteboardTypeFileURLPromise, nil]];
[tableView setDraggingSourceOperationMask:NSDragOperationCopy forLocal:NO];
}
else
{
[tableView registerForDraggedTypes: [NSArray arrayWithObjects:nil]];
[tableView setDraggingSourceOperationMask:NSDragOperationCopy forLocal:NO];
}
}
-(void)awakeFromNib
{
[self setAcceptDrops:YES];
}
Hope it helps:)
在尝试解决不同的问题时 - 将自定义项目拖到垃圾箱并使用namesOfPromisedFilesDroppedAtDestination
我发现即使拖动的项目像拖动一样消失,namesOfPromisedFilesDroppedAtDestination
也从未被调用过。为了解决这个问题,您可以实现:
-(void)draggedImage:(NSImage *)anImage
endedAt:(NSPoint)aPoint
operation:(NSDragOperation)operation
并检查操作NSDragOperationDelete