How to get RealmSwift working with Xcode 11? - ios

Question

I've been trying to get started with Realm (version 4.3.0) as a database option with Xcode 11. With my Googling skills I could not get an answer for my problems. I've tried to use the Official Realm documentation but it appears that the way they do things is not working with Xcode 11. Basic code:
import UIKit
import RealmSwift
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
class Test: Object {
#objc dynamic var text = ""
#objc dynamic var internalId = 0
}
let newTest = Test()
newTest.text = "Text" // Errors happen here
print("text: \(newTest.text)")
}
I get an errors that I definitely was not expecting:
Consecutive declarations on a line must be separated by ';'
Expected '(' in argument list of function declaration
Expected '{' in body of function declaration
Expected 'func' keyword in instance method declaration
Expected declaration
Invalid redeclaration of 'newTest()'
Also when I'm trying to initialize and write to Realm with:
let realm = try! Realm()
try! realm.write { // Error here
realm.add(newTest)
}
I get the error of "Expected declaration"
From what I've read, Realm seems like a really nice database option for iOS, but with these problems, I cannot get up and running. Any help would be greatly appreciated.

Answer 1

Let's rearrange the code so the objects and functions are in their correct place.
import UIKit
import RealmSwift
//this makes the class available throughout the app
class Test: Object {
#objc dynamic var text = ""
#objc dynamic var internalId = 0
}
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
//create a new realm object in memory
let newTest = Test()
newTest.text = "Text"
print("text: \(newTest.text)")
//persist the object to realm
let realm = try! Realm()
try! realm.write {
realm.add(newTest)
}
//or read objects
let results = realm.objects(Test.self)
for object in results {
print(object.text)
}
}
}

Answer 2

Like #108g commented:
I was trying to create an instance at class level. So I moved the creation, modification and the print inside viewDidLoad() method. Then I moved my Test class into a new file.
So the code that works:
ViewController.swift
import UIKit
import RealmSwift
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let newTest = Prompt()
newTest.text = "Text"
print("text: \(newTest.text)")
let realm = try! Realm()
try! realm.write {
realm.add(newTest)
}
}
}
And RealmTest.swift (new file)
import Foundation
import RealmSwift
class Prompt: Object {
#objc dynamic var text = ""
#objc dynamic var internalId = 0
}