Difference between -fileHandleForWritingAtPath: and fileHandleForUpdatingAtPath:?

StackOverflow https://stackoverflow.com/questions/4003793

  •  25-09-2019
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Question

For me it sounds like the same thing. Updating a file implies to write to the file. Writing to a file is also an update for me. But I guess there's a subtle difference ;-)

Does anyone know?

Was it helpful?

Solution

fileHandleForWritingAtPath: returns an object that responds only to writeData:.

fileHandleForUpdatingAtPath: responds to both NSFileHandle read... messages and writeData:.

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