ios - 为什么当我在 localNotification 中解包字符串数组时它返回 nil？

Question

notificationTime = ["2016-05-26 16:27:17 +0000","2016-05-24 13:29:37 +0000"]
var num = 0
func locaNotification(num:Int)
{
    let dateFormatter = NSDateFormatter()
    dateFormatter.locale = NSLocale.currentLocale()
    dateFormatter.dateStyle = NSDateFormatterStyle.FullStyle

    var dateAsString =  notificationTime[num]
    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm"
    var newDate = dateFormatter.dateFromString(dateAsString)!

这里解包返回nil，上一行代码后newDate = nil!

    var arr = UIApplication.sharedApplication().scheduledLocalNotifications
    for localN:UILocalNotification in arr!
    {
        var notificationFireDate:NSDate = localN.fireDate!
        if notificationFireDate == newDate
        {
            UIApplication.sharedApplication().cancelLocalNotification(localN)
        }
    }
}

Answer 1

你的问题是“yyyy-MM-dd HH:mm”不对你可以看这个网站http://nsdateformatter.com/

我认为您的字符串“2016-05-26 16:27:17 +0000”需要是“2016-05-26T16:27:17+0000”并且您的格式需要是“yyyy-MM-dd” 'T'HH:mm:ssZ", 希望对你有帮助