Swift 2 beta: NSFileHandle(forReadingAtPath path: String) and forWritingAtPath missing throws?

Question

jackthesplat OP

Created Jun ’15

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Noticed that the read and write contructors for NSFileHandle throw when a NSURL is given but not when a path is given.

Is it that the throws is likely to be added in a future release?

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Answer 1

DTS Engineer OP

Apple

Jun ’15

Accepted Answer

That's because the Objective-C versions don't include an error return. Contrast:

+ (nullable instancetype)fileHandleForReadingAtPath:(NSString *)path;

and:

+ (nullable instancetype)fileHandleForReadingFromURL:(NSURL *)url error:(NSError **)error NS_AVAILABLE(10_6, 4_0);

There's not much that Swift can do about this.

* * *

As an aside, I encourage folks to use file URLs rather than paths. There are a couple of situations where using a path drops useful information. Most of these are irrelevant on iOS, but it's still best practice to use file URLs everywhere.

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Quinn "The Eskimo!"

Apple Developer Relations, Developer Technical Support, Core OS/Hardware

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