swift2.0でのシェア方法の自分用メモ ref: http://qiita.com/MTattin/items/a911ef686144f5a84b0a

file0.swift

    func share1() {
        let shareText     = "テキストテキスト\nテキストテキスト"
        let shareWebsite  = NSURL
        let shareImage    = UIImage
        let activityItems = [
            shareText,
            shareWebsite,
            shareImage,
        ]
        let vc = UIActivityViewController(activityItems: activityItems, applicationActivities: nil)
        presentViewController(vc, animated: true, completion: nil)
    }

file1.swift

    func share2() {
        let shareText     = "テキストテキスト\nテキストテキスト"
        let shareWebsite  = NSURL
        let shareImage    = UIImage
        let scl: SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeTwitter)
        scl.setInitialText(shareText)
        scl.addImage(shareImage)
        scl.addURL(shareWebsite)
        presentViewController(scl, animated: true, completion: {})
    }