微信小程序设置缓存失效时间及读取缓存
//设置时效缓存，time为有效时间，（单位：小时，不填则默认24小时） function setStorageSyncHour(key, value, time) { wx.setStorageSync(key, value) var t = time ? t
//设置时效缓存，time为有效时间，（单位：小时，不填则默认24小时）
function setStorageSyncHour(key, value, time) {
wx.setStorageSync(key, value)
var t = time ? time : 24;
var seconds = parseInt(t * 3600);
if (seconds > 0) {
var timestamp = Date.parse(new Date());
timestamp = timestamp / 1000 + seconds;
wx.setStorageSync(key + 'dtime', timestamp + "")
} else {
wx.removeStorageSync(key + 'dtime')
}
}
//设置时效缓存，time为有效时间，（单位：秒，不填则默认3600s）
function setStorageSyncSecond(key, value, time) {
wx.setStorageSync(key, val)
var t = time ? time : 3600;
var seconds = parseInt(t);
if (seconds > 0) {
var timestamp = Date.parse(new Date());
timestamp = timestamp / 1000 + seconds;
wx.setStorageSync(k + 'dtime', timestamp + "")
} else {
wx.removeStorageSync(k + 'dtime')
}
}
//读取缓存，若缓存不存在，返回def，def为可选参数，表示无缓存数据时返回值（支持字符串、json、数组、boolean等等）
function getStorageSyncTime(key, def) {
var deadtime = parseInt(wx.getStorageSync(key + 'dtime'))
if (deadtime) {
if (parseInt(deadtime) < Date.parse(new Date()) / 1000) {
wx.removeStorageSync(key);
wx.removeStorageSync(key + 'dtime');
if (def) { return def; } else { return; }
}
}
var res = wx.getStorageSync(key);
if (res) {
return res;
} else if (def) {
return def;
} else {
return;
}
}
module.exports = {
setStorageSyncHour: setStorageSyncHour,
setStorageSyncSecond: setStorageSyncSecond,
getStorageSyncTime: getStorageSyncTime
}