Xcode：表达式的类型不明确，没有更多的上下文

Question

Xcode错误：表达式的类型不明确，没有更多的上下文

我该如何解决？

let componentss = calendar.components(.CalendarUnitYear | .CalendarUnitMonth | .CalendarUnitDay | .CalendarUnitHour | .CalendarUnitMinute | .CalendarUnitSecond, fromDate: date)

Answer 1

在Swift 2.0中，

CalendarUnit名称已更改。试试这个：

let componentss = calendar.components([.Year, .Month, .Day, .Hour, .Minute, .Second], fromDate: date)

Answer 2

谢谢它有效！

dateFormat.dateStyle = NSDateFormatterStyle.ShortStyle
dateFormat.timeStyle = NSDateFormatterStyle.ShortStyle
datePicker.datePickerMode = UIDatePickerMode.DateAndTime
datePicker.addTarget(self, action: Selector("updateDateField:"),forControlEvents:UIControlEvents.ValueChanged)
yearLabel.inputView = datePicker

如何将其转换为 dd-MM-yyyy H：mm：ss ？