CODEWITHSUNDEEP
iosobjective-c
Ravindranath Akila
Ravindranath Akila

Reputation: 57

Is data handed over to UIPasteBoard deep copy or shallow copy?

If an app sets data in the UIPasteBoard of iOS, are they deep copied or shallow copied?

Upvotes: 1

Views: 481

Answers (2)

Ravindranath Akila
Ravindranath Akila

Reputation: 57

UIPasteboard uses NSData to store the data. Hence, it is deep copy.

From the official documentation for "setData:forPasteboardType:"

"Use this method to put raw data on the pasteboard. For example, you could archive a graph of model objects and pass the resulting NSData object to a related app via a pasteboard using a custom pasteboard type. (To put objects—such as NSString, NSArray, NSDictionary, NSDate, NSNumber, UIImage, or NSURL objects—on the pasteboard, use the setValue:forPasteboardType: method.) This method writes data for the first item in the pasteboard. Calling this method replaces any items currently in the pasteboard."

Upvotes: 0

B.S.
B.S.

Reputation: 21726

If you ask about - (void)setData:(NSData *)data forPasteboardType:(NSString *)pasteboardType than it is surely a Deep copy.

If you ask about strings, URL's, Colors they are also Deep copied.

Only about the Images I am preety sure that it uses the same CGImageRef, because UImage does not implement NSCopying protocol

You can test it just closing your application and see that data stays in the pasteboard.

Upvotes: 1

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