74 lines
1.6 KiB
JavaScript
74 lines
1.6 KiB
JavaScript
/**
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* 倒计时工具模块
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* 负责倒计时的格式化和启动逻辑
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*/
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/**
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* 格式化倒计时显示（秒数转为 MM:SS 格式）
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* @param {Number} seconds - 剩余秒数
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* @returns {String} 格式化后的时间字符串
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*/
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export function formatTimer(seconds) {
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if (seconds <= 0) return '00:00';
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const mins = Math.floor(seconds / 60);
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const secs = seconds % 60;
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// 兼容 padStart（微信小程序可能不支持）
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const formatNumber = (num) => {
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return num < 10 ? '0' + num : String(num);
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};
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return formatNumber(mins) + ':' + formatNumber(secs);
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}
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/**
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* 启动倒计时
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* @param {Object} context - 页面上下文
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* @param {Function} onComplete - 倒计时结束回调
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* @returns {Number} 定时器ID
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*/
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export function startTimer(context, onComplete) {
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if (context.timerInterval) {
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clearInterval(context.timerInterval);
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}
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// 立即更新一次显示
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context.setData({
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timerText: formatTimer(context.data.remainingTime)
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});
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context.timerInterval = setInterval(() => {
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const remainingTime = context.data.remainingTime - 1;
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if (remainingTime <= 0) {
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// 时间到
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if (context.timerInterval) {
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clearInterval(context.timerInterval);
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context.timerInterval = null;
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}
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if (onComplete) {
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onComplete();
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}
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return;
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}
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context.setData({
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remainingTime,
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timerText: formatTimer(remainingTime)
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});
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}, 1000);
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return context.timerInterval;
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}
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/**
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* 停止倒计时
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* @param {Object} context - 页面上下文
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*/
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export function stopTimer(context) {
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if (context.timerInterval) {
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clearInterval(context.timerInterval);
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context.timerInterval = null;
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}
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}
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