小编Yan*_*nir的帖子

我试图获取当周的当前日期,以便根据它的日期更改图像.我的当前代码出错:"条件绑定中的绑定值必须是可选类型." 我对swift和ios很新,所以我不太清楚要改变什么.

   func getDayOfWeek()->Int? {
    if let todayDate = NSDate() {
        let myCalendar = NSCalendar(calendarIdentifier: NSGregorianCalendar)
        let myComponents = myCalendar?.components(.WeekdayCalendarUnit, fromDate: todayDate)
        let weekDay = myComponents?.weekday
        return weekDay
    } else {
        return nil
    }
}