Swift3 使用系统UIAlertView方法做吐司效果

p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Menlo; color: #000000 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Menlo; color: #cf8724 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Menlo; color: #000000; min-height: 16.0px }
p.p4 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Menlo; color: #c35900 }
span.s1 { }
span.s2 { color: #cf8724 }
span.s3 { font: 14.0px "PingFang SC" }
span.s4 { color: #36568a }
span.s5 { color: #c35900 }
span.s6 { color: #587ea8 }
span.s7 { color: #000000 }

　　 /**
*显示弹出信息
*/
class func showAlertMessage(_ str:String,showtime Num:Double){

let alert = UIAlertView(title: str, message: nil, delegate: nil, cancelButtonTitle: nil);
alert.show()
//        self.performSelector(#selector(dismissAlert(_:)), withObject: alert, afterDelay: Num)
let dispatchTime: DispatchTime = DispatchTime.now() + Double(Int64(0.10 * Num * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC)
DispatchQueue.main.asyncAfter(deadline: dispatchTime, execute: {
dismissAlert(alert)
})
}

class func dismissAlert(_ alert:UIAlertView){
alert.dismiss(withClickedButtonIndex: alert.cancelButtonIndex, animated: true)
}