/**
* 生成随机uuid
*/
export function uuid() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random() * 16 | 0
var v = c === 'x' ? r : (r & 0x3 | 0x8)
return v.toString(16)
})
}