UIButton的位置顯示不正確

Question

我正在處理Swift中的按鈕。好吧，看起來Swift並沒有正確設置我的UIButton的位置，因爲它出現在屏幕上，當我想要它在中心時。這是我的代碼，我做錯了什麼？

import SpriteKit 
import UIKit 

class GameScene: SKScene, SKPhysicsContactDelegate { 
override func didMoveToView(view: SKView) { 
    /* Setup your scene here */ 

    let button = UIButton(type: UIButtonType.System) 

    let buttonImage = UIImage(named: "Button") 
    button.frame = CGRectMake(self.frame.size.width/2, self.frame.size.height/2, 100, 86) // x, y, width, height 
    button.setBackgroundImage(buttonImage, forState: UIControlState.Normal) 
    button.addTarget(self, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside) 
    self.view?.addSubview(button) 

} 

func buttonAction (sender: UIButton!) { 

    print("Button tapped") 

} 

請幫助：/

Answer 1

試試這可能會有幫助。

import SpriteKit 
import UIKit 

class GameScene: SKScene, SKPhysicsContactDelegate { 
override func didMoveToView(view: SKView) { 
    /* Setup your scene here */ 

    let button = UIButton() 

    let buttonImage = UIImage(named: "Button") 

    button.frame.size = CGSizeMake(100, 86) 
    button.center = self.view.center; 
    button.setBackgroundImage(buttonImage, forState: UIControlState.Normal) 
    button.addTarget(self, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside) 
    self.view?.addSubview(button) 

}