字符串类型日期用 年-月-日 形式显示

let commenttime = "\(dict["newsoccurrencetime"]!)"
        let timestampIntInMsec = Int.init(commenttime)
        let timestampDoubleInSec:Double = Double(timestampIntInMsec!)/1000
        print("timestampDoubleInSec=\(timestampDoubleInSec)")
        let parsedDate:NSDate = NSDate(timeIntervalSince1970: TimeInterval(timestampDoubleInSec))
        print("parsedDate=\(parsedDate)")
        
        let date = "\(parsedDate)".substring(to: 10)
        
        let newsOccurrencenTimeFrame = CGRect.init(x: newsSresourceLabel.frame.maxX + 12, y: newsSresourceLabel.frame.minY, width: 200, height: 40)
        let newsOccurrencenTimeLabel = UILabel.init(frame: newsOccurrencenTimeFrame)
        newsOccurrencenTimeLabel.text = date
        newsOccurrencenTimeLabel.textColor = UIColor("#999999")
        newsOccurrencenTimeLabel.font = UIFont.systemFont(ofSize: 13)
        newsOccurrencenTimeLabel.sizeToFit()
        bgView.addSubview(newsOccurrencenTimeLabel)