Hello all,
I am working on copy/paste in Core Data and have been following the
NSPersistentDocument Core Data Tutorial tutorial from
http://developer.apple.com/documentation/Cocoa/Conceptual/NSPersistentDocumentTutorial/05_CopyAndPaste/copyAndPaste.html
I am having a problem with the pasteboard in that I can't seem to get
data out of it once I leave the copy: method. All of the data is
correct all through the copy method (I even pull it back off the
pasteboard to check it, and all is fine there) as soon as I move to
the paste: method I get NULL data, looked around on Google for ideas
but none so far. The relevant code is below, any ideas are welcome:
#import "MyDocument.h"
NSString *MSSalesPBoardType = @"MSSalesPBoardType";
@implementation MyDocument
- (void) copy:(id *) sender
{
// removed selection code correct data exists in this NSLog statement
NSLog(@"copyObjectsArray = %...@.", [copyObjectsArray description]);
NSPasteboard *generalPasteboard = [NSPasteboard generalPasteboard];
[generalPasteboard declareTypes:[NSArray
arrayWithObjects:MSSalesPBoardType, NSStringPboardType, nil]
owner:self];
NSData *copyData = [NSKeyedArchiver
archivedDataWithRootObject:copyObjectsArray];
NSArray *salesArray = [NSKeyedUnarchiver
unarchiveObjectWithData:copyData];
// Here the data is intact
NSLog(@"salesArray = %...@.", [salesArray description]);
NSLog(@"copyData = %...@.", [copyData description]);
[generalPasteboard setData:copyData forType:MSSalesPBoardType];
[generalPasteboard setString:[copyStringsArray
componentsJoinedByString:@"\n"] forType:NSStringPboardType];
NSData *data = [generalPasteboard dataForType:MSSalesPBoardType];
// Here the data is still intact and matches the above description of
copyData
NSLog(@"data = %...@.", [data description]);
}
- (void) paste:(id *) sender
{
NSPasteboard *generalPasteboard = [NSPasteboard generalPasteboard];
NSData *data = [generalPasteboard dataForType:MSSalesPBoardType];
if (data = nil)
{
return;
}
// Here data = NULL
NSLog(@"data = %...@.", [data description]);
NSArray *salesArray = [NSKeyedUnarchiver unarchiveObjectWithData:data];
// ... method continues...
}
Thanks,
Mike Swan
http://www.michaelsswan.com
"Change itself is not painful it is resistance to change that causes
pain."
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