Xcode＆＃34;预期的贬值＆＃34;，＆＃34;表达不允许在顶级＆＃34;错误

Question

当我得到＆＃34;预期声明＆＃34;我试图在viewcontroller.swift文件中实现一个NSDatecomponent。错误和＆＃34;实例成员＆＃34;某事＆＃34;不能用于类型＆＃34; viewcontroller＆＃34;

所以，然后我决定创建一个新的.swift文件，然后在那里实现NSDatecomponents。但后来我得到了＃34;表达式不允许进入顶级＆＃34;错误。

从我发现谷歌搜索，我知道我应该在一个函数中实现它，但我不知道我应该把它包装成什么样的函数。我还想知道为什么我在viewcontroller.swift文件中获取错误以供将来参考。提前谢谢你，如果我的问题重复，请抱歉。

这是原始代码

let weekBMondayComponents:NSDateComponents = NSDateComponents()
weekBMondayComponents.year = 2016
weekBMondayComponents.month = 01
weekBMondayComponents.day = 11
weekBMondayComponents.hour = 08
weekBMondayComponents.minute = 39
weekBMondayComponents.timeZone = NSTimeZone.systemTimeZone()
let weekBMonday = userCalendar.dateFromComponents(weekBMondayComponents)!

Answer 1

您希望将weekBMondayComponents声明为子类的属性或变量，并可能在viewDidLoad通知处理程序中初始化它。

class ViewController: UIViewController {
    var weekBMondayComponents:NSDateComponents = NSDateComponents()

func setUpADay() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    weekBMondayComponents.year = 2016
    weekBMondayComponents.month = 01
    weekBMondayComponents.day = 11
    weekBMondayComponents.hour = 08
    weekBMondayComponents.minute = 39
    weekBMondayComponents.timeZone = NSTimeZone.systemTimeZone()
}