//in ViewController
var safariViewController : SFSafariViewController? // to keep instance
//...

guard let templatable = try? SdkJSONDecoder.custom.decode(FeedTemplate.self, from: feedTemplateJsonStringData) else {
    return
}

// Check if Kakao Talk has been installed.
if ShareApi.isKakaoTalkSharingAvailable() {
    // Kakao Talk Sharing is available.
    // For 'templatable', refer to the 'Configure a message' guide.
    ShareApi.shared.shareDefault(templatable: templatable) {(sharingResult, error) in
    if let error = error {
        print(error)
    }
    else {
        print("shareDefault() success.")

        if let sharingResult = sharingResult {
            UIApplication.shared.open(sharingResult.url, 
                            options: [:], completionHandler: nil)
        }
    }
}
else {
    // If Kakao Talk is not installed, it is recommended to share URI via web.
    // You can use custom webView or default browser.
    // Example of sharing URI via web
    if let url = ShareApi.shared.makeDefaultUrl(templatable: templatable) {
        self.safariViewController = SFSafariViewController(url: url)
        self.safariViewController?.modalTransitionStyle = .crossDissolve
        self.safariViewController?.modalPresentationStyle = .overCurrentContext
        self.present(self.safariViewController!, animated: true) {
            print("Succeeded in presenting web.")
        }
    }
}

let templateId : Int64 = 12345

// Check if Kakao Talk has been installed.
if ShareApi.isKakaoTalkSharingAvailable() {
    // Kakao Talk Sharing is available.
    ShareApi.shared.shareCustom(templateId: templateId, templateArgs:["title":"This is title.", "description":"This is description."]) {(sharingResult, error) in
        if let error = error {
            print(error)
        }
        else {
            print("shareCustom() success.")
            if let sharingResult = sharingResult {
                UIApplication.shared.open(sharingResult.url, options: [:], completionHandler: nil)
            }
        }
    }
}
else {
    // If Kakao Talk is not installed, it is recommended to share URI via web.
    // You can use custom webView or default browser.
    // Example of sharing URI via web
    if let url = ShareApi.shared.makeCustomUrl(templateId: templateId, templateArgs:["title":"This is title.", "description":"This is description."]) {
        self.safariViewController = SFSafariViewController(url: url)
        self.safariViewController?.modalTransitionStyle = .crossDissolve
        self.safariViewController?.modalPresentationStyle = .overCurrentContext
        self.present(self.safariViewController!, animated: true) {
            print("Succeeded in presenting web.")
        }
    }
}

let requestUrl = "https://developers.kakao.com"

// Check if Kakao Talk has been installed.
if ShareApi.isKakaoTalkSharingAvailable() {
    // Kakao Talk Sharing is available.
    ShareApi.shared.shareScrap(requestUrl: requestUrl) {(sharingResult, error) in
        if let error = error {
            print(error)
        }
        else {
            print("shareScrap() success.")
            if let sharingResult = sharingResult {
                UIApplication.shared.open(sharingResult.url, options: [:], completionHandler: nil)
            }
        }
    }
}
else {
    // If Kakao Talk is not installed, it is recommended to share URI via web.
    // You can use custom webView or default browser.
    // Example of sharing URI via web
    if let url = ShareApi.shared.makeScrapUrl(requestUrl: requestUrl) {
        self.safariViewController = SFSafariViewController(url: url)
        self.safariViewController?.modalTransitionStyle = .crossDissolve
        self.safariViewController?.modalPresentationStyle = .overCurrentContext
        self.present(self.safariViewController!, animated: true) {
            print("Succeeded in presenting web.")
        }
    }
}

let requestUrl = "https://developers.kakao.com"
let templateId : Int64 = 12345

// Check if Kakao Talk has been installed.
if ShareApi.isKakaoTalkSharingAvailable() {
    // Kakao Talk Sharing is available.
    ShareApi.shared.shareScrap(requestUrl: requestUrl, templateId: templateId) {(sharingResult, error) in
    if let error = error {
        print(error)
    }
    else {
        print("shareScrap() success.")
        if let sharingResult = sharingResult {
            UIApplication.shared.open(sharingResult.url, options: [:], completionHandler: nil)
        }
    }
}
else {
    // If Kakao Talk is not installed, it is recommended to share URI via web.
    // You can use custom webView or default browser.
    // Example of sharing URI via web
    if let url = ShareApi.shared.makeScrapUrl(requestUrl: requestUrl, templateId: templateId) {
        self.safariViewController = SFSafariViewController(url: url)
        self.safariViewController?.modalTransitionStyle = .crossDissolve
        self.safariViewController?.modalPresentationStyle = .overCurrentContext
        self.present(self.safariViewController!, animated: true) {
            print("Succeeded in presenting web.")
        }
    }
}

// Template ID.
let templateId : Int64 = 12345;
// Template arguments.
let templateArgs = ["title": "This is the title area.", "description": "This is the description area."]
// Information passed from Kakao server. 
let serverCallbackArgs = ["user_id": "abcd", "product_id": "1234"]

// Check if Kakao Talk has been installed.
if ShareApi.isKakaoTalkSharingAvailable() {
    // Kakao Talk Sharing is available.
    ShareApi.shared.shareCustom(templateId:templateId,
                            templateArgs:templateArgs,
                            serverCallbackArgs: serverCallbackArgs) { (sharingResult, error) in
        if let error = error {
            print(error)
        }
        else {
            print("shareCustom() success.")
            if let sharingResult = sharingResult {
                UIApplication.shared.open(sharingResult.url, options: [:], completionHandler: nil)
            }
        }
    }
}
else {
    // If Kakao Talk is not installed, it is recommended to share URI via web.
    // You can use custom webView or default browser.
    // Example of sharing URI via web
    if let url = ShareApi.shared.makeCustomUrl(templateId:templateId,
                                                    templateArgs:templateArgs,
                                                    serverCallbackArgs: serverCallbackArgs) {
        self.safariViewController = SFSafariViewController(url: url)
        self.safariViewController?.modalTransitionStyle = .crossDissolve
        self.safariViewController?.modalPresentationStyle = .overCurrentContext
        self.present(self.safariViewController!, animated: true) {
            print("Succeeded in presenting web.")
        }
    }
}

if let image = UIImage(named: "sample1") {
    ShareApi.shared.imageUpload(image:image) { [weak self] (imageUploadResult, error) in
        if let error = error {
            print(error)
        }
        else {
            print("imageUpload() success.")
        }
    }
}

if let url = URL(string:"https://t1.kakaocdn.net/kakaocorp/Service/KakaoTalk/pc/slide/talkpc_theme_01.jpg") {
    ShareApi.shared.imageScrap(imageUrl: url, completion: { [weak self] (imageUploadResult, error) in
        if let error = error {
            print(error)
        }
        else {
            print("imageUpload() success.")
        }
    })
}

let link = Link(webUrl: URL(string:"https://developers.kakao.com"),
                mobileWebUrl: URL(string:"https://developers.kakao.com"))
let appLink = Link(androidExecutionParams: ["key1": "value1", "key2": "value2"],
                    iosExecutionParams: ["key1": "value1", "key2": "value2"])
let button1 = Button(title: "View on Web", link: link)
let button2 = Button(title: "View on App", link: appLink)

let social = Social(likeCount: 286,
                    commentCount: 45,
                    sharedCount: 845)
let content = Content(title: "Strawberry Cheese Cake",
                        imageUrl: URL(string:"https://mud-kage.kakao.com/dn/Q2iNx/btqgeRgV54P/VLdBs9cvyn8BJXB3o7N8UK/kakaolink40_original.png")!,
                        description: "#Cake #Strawberry #Sampyeong-dong #Cafe #Vibe #BlindDate",
                        link: link)
let feedTemplate = FeedTemplate(content: content, social: social, buttons: [button1, button2])

//Encode message template.
if let feedTemplateJsonData = (try? SdkJSONEncoder.custom.encode(feedTemplate)) {

//Convert the created message template object to a json object.
    if let templateJsonObject = SdkUtils.toJsonObject(feedTemplateJsonData) {
        ShareApi.shared.shareDefault(templateObject:templateJsonObject) {(sharingResult, error) in
            if let error = error {
                errorHandler(error)
            }
            else {
                print("shareDefault(templateObject:templateJsonObject) success.")
                
                //Do something
                guard let sharingResult = sharingResult else { return }
                UIApplication.shared.open(sharingResult.url, options: [:], completionHandler: nil)
            }
        }
    }
}