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iOS swift FileManager remove/delete file only if it exists. "No such file or directory" fix.
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| // Most implementations first check if the file exists, and then do the remove. | |
| // This is subject to race conditions and requires accessing the file system twice. | |
| // A better solution is to ignore that particular exception. | |
| extension FileManager { | |
| func removeItemIfExists(at url: URL) throws { | |
| func isDoesNotExist(error: NSError) -> Bool { | |
| return error.domain == NSPOSIXErrorDomain && error.code == ENOENT | |
| } | |
| func isFailedToRemove(error: NSError) -> Bool { | |
| return error.domain == NSCocoaErrorDomain && error.code == 4 | |
| } | |
| do { | |
| try removeItem(at: url) | |
| } | |
| catch let error as NSError { | |
| if isFailedToRemove(error: error), | |
| let underlying = error.userInfo[NSUnderlyingErrorKey] as? NSError, | |
| isDoesNotExist(error: underlying) | |
| { | |
| // ignore. The file didn't exist. | |
| } | |
| else { | |
| // a different error which should be handled | |
| throw error | |
| } | |
| } | |
| } | |
| } |
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