Error combining NSCalendarUnit with OR (pipe) in Swift 2.0

问题

I have some code that's breaking in Swift 2.0:

let formatter = NSDateComponentsFormatter()
formatter.allowedUnits = NSCalendarUnit.Year
formatter.allowedUnits |= .Month
formatter.allowedUnits |= .WeekOfMonth 
formatter.allowedUnits |= .Day
formatter.allowedUnits |= .Hour
formatter.allowedUnits |= .Minute

I get the error Binary operator '|=' cannot be applied to 'NSCalenderUnit' operands.

What's the new way of doing this kinda thing?

回答1:

NSCalendarUnit is an OptionSetType in Swift 2, instead of a RawOptionSetType. This means that you can't logical-or it anymore. Instead, you can use an array literal representation of it:

formatter.allowedUnits = [.Year, .Month, .WeekOfMonth, .Day, .Hour, .Minute]

来源：https://stackoverflow.com/questions/32381664/error-combining-nscalendarunit-with-or-pipe-in-swift-2-0