Insert Description with Line Breaks via YouTube Data API - swift

Question

I have working code that uploads my video, title and description to YouTube using Swift and Alamofire.
My description uploads to YouTube as one line and I would like to split the line to break after each variable.
My description variable is like so:
myDescription = (price! as! String) + " " + (package! as! String)
When that get's sent to YouTube, it appears as:
"Pricehere PackageName"
I want the PackageName to show in the YouTube description with a line break like:
"Pricehere
PackageName"
I had done this in Objective C on an old project like this:
NSString *description = [NSString stringWithFormat:#"%#\n%#\n%#\n%#\n%#\n%#", str1, str2, str3, str4, str5, str6];
When that was passed to YouTube it added each variable and then did a line break.
Thanks for any help.
edit adding in the function for the YouTube Upload for reference:
func postVideoToYouTube(token: String, callback: #escaping (Bool) -> Void){
let headers = ["Authorization": "Bearer \(token)"]
let urlYoutube = "https://www.googleapis.com/upload/youtube/v3/videos?part=snippet"
let path = videoURL?.path
let videodata: Data = NSData.dataWithContentsOfMappedFile(path!)! as! Data
upload(
multipartFormData: { multipartFormData in
multipartFormData.append("{'snippet':{'title' : '\(self.myTitle)', 'description': '\(self.myDescription)'}}".data(using: String.Encoding.utf8, allowLossyConversion: false)!, withName: "snippet", mimeType: "application/json")
multipartFormData.append(videodata, withName: "video", fileName: "video.mp4", mimeType: "application/octet-stream")
},
to: urlYoutube,
method:Alamofire.HTTPMethod.post,
headers:headers,
encodingCompletion: { encodingResult in
switch encodingResult {
case .success(let upload, _, _):
upload.responseJSON { response in
print(response)
let result = response.result.value
let JSON = result as! NSDictionary
let videoId = JSON.object(forKey: "id") as! String
print("VideoID: ", videoId)
self.addVideoToPlaylist(videoId: videoId, callback: { (result) in
callback(result)
})
}
break
case .failure(let encodingError):
print(encodingError)
callback(false)
break
}
}
)
}

Answer 1

Be careful with force casting variables like you're doing, I would recommend you to do something like this:
if let price = price as? String, let package = package as? String {
myDescription = "\(price)\n\(package)"
}
This way you're safe unwraping and also using String Interpolation to construct the string, you can read more in the documentation.