const cache = {
 key: 'app_',
 //设置缓存(expire为缓存时效)
 set(key: string, value: any, expire?: string) {
 key = this.getKey(key)
 let data: any = {
 expire: expire ? this.time() + expire : '',
 value
 }

 if (typeof data === 'object') {
 data = JSON.stringify(data)
 }
 try {
 uni.setStorageSync(key, data)
 } catch (e) {
 return null
 }
 },
 get(key: string) {
 key = this.getKey(key)
 try {
 const data = uni.getStorageSync(key)
 if (!data) {
 return null
 }
 const { value, expire } = JSON.parse(data)
 if (expire && expire < this.time()) {
 uni.removeStorageSync(key)
 return null
 }
 return value
 } catch (e) {
 return null
 }
 },
 //获取当前时间
 time() {
 return Math.round(new Date().getTime() / 1000)
 },
 remove(key: string) {
 key = this.getKey(key)
 uni.removeStorageSync(key)
 },
 getKey(key: string) {
 return this.key + key
 }
}

export default cache