如何获得Swift的当前时间？

let date = NSDate()
    let calender = NSCalendar.currentCalendar()
    let components = calender.component([.Hour, .Minute], fromDate: date)

然后我尝试获取组件的小时

let hour = components.hour

这给了我“类型的价值”Int“没有成员’小时’”.有什么建议？

let components = calender.component([.Hour, .Minute], fromDate: date)

至

let components = calender.components([.Hour, .Minute], fromDate: date)