首先,我使用
Xcode 6 beta 2.其次,我有编程经验(基本,VB,脚本语言),但它不包括任何严肃的OO编程,我对IOS编程完全不熟悉.直接进入斯威夫特.提前感谢那些可以提供帮助的人.我几天来一直在努力奋斗.
无法构建简单的UIImage数组. (为了简单起见,我已经删除了所有其他代码.)我试图理解为什么声明一个UIImage数组并加载图像在viewDidLoad()中工作,但不是在ViewController的“基础”,这是我似乎需要的地方它可以用于其他工作.
(我注意到它似乎与这个数组声明有关,这会引起我的困惑.我可以在任一位置声明并分配简单的UIImage变量.)
这是我的代码：
// ViewController.swift
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view,typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
var icon = UIImage[]()
icon.append(UIImage(named: "yes.png")) <<==== expected declaration error
icon.append(UIImage(named: "no.png"))
}
但是这段代码没有：
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view,typically from a nib.
var icon = UIImage[]()
icon.append(UIImage(named: "yes.png")) <==== no error,and builds
icon.append(UIImage(named: "no.png"))
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}