How to convert to id with conforming protocol?

Asked Sep 01 '17 at 16:06

Active Sep 01 '17 at 16:34

Viewed 64 times

Why is following code failed?

NSPasteboardItem* pasteboard_item = [NSPasteboardItem new];
id<NSPasteboardWriting> temp_obj = pasteboard_item;

I am newbie in Objective-c, but as I understand, NSPasteboardItem conforms NSPasteboardWriting protocol and such assignment should be allowed.

Xcode says:

Cannot initialize a variable of type id with lvalue of type 'NSPasteboardItem*'

Note: NSPasteboardItem is the class from AppKit to work with NSPasteBoard

edited Sep 01 '17 at 16:34

Rob

asked Sep 01 '17 at 16:06

Alex Aparin

1

This compiles just fine on my machine. Are you remembering to import the entire Cocoa framework, and not just Foundation? – Charles Srstka Sep 01 '17 at 16:23
@CharlesSrstka, thnx for hint. I will check it out. Unfortunately I don't have access to mac at the moment. – Alex Aparin Sep 01 '17 at 18:18

0 Answers0