Sprites Spawning In Straight Away At The Start - swift

Question

I am currently making a game on Xcode 11, I am having a problem where in which my sprite will spawn in straight away at the start, even through their is a wait delay, but after the first spawn the sprites spawn in at their current time. How can I make it so the sprites wont spawn in untill 3 seconds after the scene has started.
Any help would be greatly appreciated.
The photo attached shows what happens at the start of the game.
I have attached part of my code for one of the sprites as their setup is similar to each other.
//Setup Bird
func setupBird() {
bird = SKSpriteNode(imageNamed: "bird-1")
bird.name = "Bird"
bird.zPosition = 20.0
bird.setScale(1.5)
let birdHeight = bird.frame.height
let random = CGFloat.random(min: -birdHeight, max: birdHeight*2.0)
bird.position = CGPoint(x: cameraRect.maxX + bird.frame.width, y: size.height/2.0 + birdHeight + random)
bird.physicsBody = SKPhysicsBody(circleOfRadius: bird.size.width/2.0)
bird.physicsBody!.affectedByGravity = false
bird.physicsBody!.isDynamic = false
bird.physicsBody!.categoryBitMask = PhysicsCategory.Bird
bird.physicsBody!.contactTestBitMask = PhysicsCategory.Player
addChild(bird)
bird.run(.sequence([.wait(forDuration: 15, withRange: 5), .removeFromParent()]))
//Animation For Birds
var textures: [SKTexture] = []
for i in 1...3 {
textures.append(SKTexture(imageNamed: "bird-\(i)"))
}
bird.run(.repeatForever(.animate(with: textures, timePerFrame: 0.15)))
}
func spawnBird() {
let random = CGFloat.random(min: 15.0, max: 30.0)
run(.repeatForever(.sequence([
.wait(forDuration: TimeInterval(random)),
.run { [weak self] in
self?.setupBird()
}
])))
}

Answer 1

I fixed the problem by adding frame.width/2.0 to the position, which moves the inital bird position.
bird.position = CGPoint(x: cameraRect.maxX + frame.width/2.0 + bird.frame.width, y: size.height/2.0 + birdHeight + random)

Answer 2

If I understand correctly, you want to spawn a bird periodically, starting after an initial delay.
You could delay the repeating action, either with another SpriteKit action or with DispatchQueue.
func spawnBirds() {
let spawnBirdAfterDelayAction = SKAction.sequence([
.wait(forDuration: 22.5, withRange: 7.5),
.run { [weak self] in self?.setupBird() }
])
run(
.sequence([
.wait(forDuration: 3), // initial delay
.repeatForever(spawnBirdAfterDelayAction)
])
)
}
/// As Knight0fDragon pointed out, this approach is inferior because it circumvents the SpriteKit runtime.
DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
self.spawnBirds()
}