尝试了解与此类似的其他问题，但无法弄明白。 Type of expression is ambigous without more context在“CalendarUnitHour”上显示{＆＃39}。在这行代码中：
let components = calendar.components(.CalendarUnitHour | .CalendarUnitMinute | .CalendarUnitMonth | .CalendarUnitYear | .CalendarUnitDay, fromDate: date)