countdown

问题 I am willing to do a countdown timer in Angular 2 that start from 60 (i.e 59, 58,57, etc...) For that I have the following: constructor(){ Observable.timer(0,1000).subscribe(timer=>{ this.counter = timer; }); } The above, ticks every second, which is fine; however, it goes in an ascending order to an unlimited number. I am not sure if there is a way to tweak it so I can have a countdown timer. 回答1: There are many ways to achieve this, a basic example is to use the take operator import {

问题 How can I do to put the value passed in the construction, to make a timer that rounds to the first decimal and shows at the child text of my RaisedButton? I've tried but without luck. I manage to make work the callback function with a simple Timer but no periodic and with no update of value in real time in the text... import 'package:flutter/material.dart'; import 'dart:ui'; import 'dart:async'; class TimerButton extends StatefulWidget { final Duration timerTastoPremuto; TimerButton(this

问题 I need to update time every second on a countdown timer which counts down to Christmas. How do I update the time in my text view.I do not have the code in the onCreate method. here is some of my code. When I run the code it gives the exact time, but it does not countdown live on screen. Any ideas? Edit: the readThisPeriod is for calculating the time left until Christmas. public void DateCalculator() { Calendar today = Calendar.getInstance(); Calendar thatDay = Calendar.getInstance(); thatDay

问题 I have implemented the JQuery Countdown Timer (jquery.lwtCountdown-1.0.js). Am facing the delay in the timer in different machines and same machine different browsers. Sometimes it take 40-50 seconds delay in total 15 mins. The javascript logic is defined below: <script type="text/javascript" > var Timer; function CreateTimer(TimerID, Time){ Timer = document.getElementById(TimerID); TotalSeconds = Time; UpdateTimer(); window.setTimeout("Tick()", 1000); } function Tick() { TotalSeconds -= 1;

问题 I have implemented the JQuery Countdown Timer (jquery.lwtCountdown-1.0.js). Am facing the delay in the timer in different machines and same machine different browsers. Sometimes it take 40-50 seconds delay in total 15 mins. The javascript logic is defined below: <script type="text/javascript" > var Timer; function CreateTimer(TimerID, Time){ Timer = document.getElementById(TimerID); TotalSeconds = Time; UpdateTimer(); window.setTimeout("Tick()", 1000); } function Tick() { TotalSeconds -= 1;

问题 I am wondering about timers in WPF. what i basically know is how to make a simple count down timer (label) count down like this code: private void buttonStartOne_Click(object sender, RoutedEventArgs e) { counterOne = new DispatcherTimer(); counterOne.Tick += new EventHandler(counterOne_Tick); counterOne.Interval = new TimeSpan(0, 0, 1); counterOneTime = 10; counterOne.Start(); } private void counterOne_Tick(object sender, EventArgs e) { // code goes here if (counterOneTime > 0) {

问题 So, i am using the timer that i asked about in this question as a count down: How to stop timer.setinterval with a tap event or leaving page in nativescript The counter works, all this while i have been using console.log to check if it works and yes it does but i want to make it appear in the xml for the user of that app to see. But the count does not update in the xml. Here's the code for the view: <Page xmlns="http://schemas.nativescript.org/tns.xsd" loaded="pageLoaded" navigatedTo=

问题 I'm trying to implement something like a countdown timer that plays an alarm at 0. I want to be able to set the amount of time to wait before the timer goes off and I'm wondering if there's a UI widget or element that provides this kind of selection functionality. Basically, does android have something like the iPhone's selection spinwheel? Or is there some type of timepicker that allows selection of an arbitrary number of hours and minutes? The timepicker widget in android has an unnecessary

问题 Could someone offer an insight into why this crashes my excel, i cant seem to work it out. Im trying to learn VBA and need some advice. sub timer() dim second second = 1.15740740740741e-05 'this is the amount excel counts as a second line1: application.wait "00:00:01" Range("a1").value = Range("a1").value - second if not range("D2").value = 0 then Goto line1 else Msgbox("Countdown ended") End if end sub 回答1: I'm sure you're not timing space shuttle launches or anything that critical. But if

问题 What I'm trying to do seems like it should be simple but is proving tricky. I need a countdown script that uses a target date and gives me three separate figures - namely Days, Hours and Minutes to that date - that I can then plug into the page in the appropriate place. I tried jCountdown but while it is highly customisable I still haven't managed to get what I need. I'd like to I can do it with php but I don't really want to combine php into a static html page that already has some jquery in