Log to Document Directory

log2docdir.swift

// sends SwiftyBeaver logs to a file in your app’s document directory 
// instead of the default caches directory
// learn more about SwiftyBeaver at https://github.com/SwiftyBeaver/SwiftyBeaver
let fm = NSFileManager.defaultManager()

if let docsURL = fm.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first {
    let file = FileDestination()
    file.logFileURL = docsURL.URLByAppendingPathComponent("my.log")
    log.addDestination(file)
    log.info("writing logs to \(file.logFileURL)")
}