Loading data from Parse server into a model file in an array. - swift

Question

I want to load data from parse server into a model file in an array called posts but i don't know how.
Here is the code :
struct Post
{
var createdBy: User
var timeAgo: String?
var caption: String?
var image: UIImage?
var numberOfLikes: Int?
var numberOfComments: Int?
var numberOfShares: Int?
static func fetchPosts() -> [Post]
{
var posts = [Post]()
var usernameArray = [String]()
var avaArray = [PFFile]()
var dateArray = [Date?]()
var picArray = [PFFile]()
var titleArray = [String]()
var uuidArray = [String]()
let query = PFQuery(className: "posts")
query.findObjectsInBackground { (objects: [PFObject]?, error: Error?) in
if error == nil {
usernameArray.removeAll(keepingCapacity: false)
avaArray.removeAll(keepingCapacity: false)
dateArray.removeAll(keepingCapacity: false)
picArray.removeAll(keepingCapacity: false)
titleArray.removeAll(keepingCapacity: false)
uuidArray.removeAll(keepingCapacity: false)
// find related objects
for object in objects! {
usernameArray.append(object.object(forKey: "username") as! String)
avaArray.append(object.object(forKey: "ava") as! PFFile)
dateArray.append(object.createdAt)
picArray.append(object.object(forKey: "pic") as! PFFile)
titleArray.append(object.object(forKey: "title") as! String)
uuidArray.append(object.object(forKey: "uuid") as! String)
}
}
}
return posts
}
}
struct User
{
var username: String?
var profileImage: UIImage?
}

Answer 1

Try this
static func fetchPosts() -> [Post]
{
var posts = [Post]()
var usernameArray = [String]()
var avaArray = [PFFile]()
var dateArray = [Date?]()
var picArray = [PFFile]()
var titleArray = [String]()
var uuidArray = [String]()
let query = PFQuery(className: "posts")
query.findObjectsInBackground { (objects: [PFObject]?, error: Error?) in
if error == nil {
// find related objects
if let returnedObjects = objects {
for object in returnedObjects {
usernameArray.append(object["username"] as! String)
avaArray.append(object["ava"] as! PFFile)
dateArray.append(object.createdAt)
picArray.append(object["pic" as! PFFile)
titleArray.append(object["title"] as! String)
uuidArray.append(object["uuid"] as! String)
}
}
}
}
return posts
}
In order to append data to your posts you need to
- Convert PFFile to UIImage
- Create a User object with the UIImage
- Add the User object to your posts
if let avaPicture = object["ava"]! as! PFFile {
avaPicture.getDataInBackground({ (imageData: Data?, error: Error?) -> Void in
if (error == nil) {
let image = UIImage(data: imageData!)
if image != nil {
// Create your User object with UIImage here
let user = User()...
// Add the new user and other data to your `posts`array
...
}
}
})
}