iOS How to fetch data for each user parse Swift - ios

Question

How can I fetch data for user which I want.
For this I want use text field where I write username, and button which will load all information about user.
Now my code load all user from data base:
let query = PFUser.query()
query?.findObjectsInBackground(block: { (object, error) in
for objects in object! {
let user = objects["username"] as! String
print(user)
}
})
How I can make it for user which I want?

Answer 1

You could filter the users locally like this:
query?.findObjectsInBackground {(objects, error) in
let users = objects as? [PFUser]
for object in (users!.filter { $0.username == something }) {
// do something
}
}
But that's a pretty bad idea because your list of users might be huge and this is wildly inefficient. If you're using PFQuery, you might want to add a constraint:
let query = PFUser.query()
query.whereKey("username", equalTo: something)
Now, when you call findObjectsInBackground, you'll only get relevant results.

Answer 2

You are getting user list in object at:
query?.findObjectsInBackground(block: { (object, error) in
Put a where clause in for loop, to get a single user by matching your required username as:
for objects in object! where (objects["username"] as! String) == "Your_Text_Field.text" {
print(objects)
let userName = objects["username"] as! String
print(userName)
}
If you don't want to match exact name rather you want to get a list of user by searching with entered text, then you can apply filter:
query?.findObjectsInBackground {(object, error) in
if let users = object as? [PFUser] {
let filteredUsers = users.filter { $0.username.contains("Your_Text_Field.text") }
print(filteredUsers)
}
}