原因：vue指令v-if具有缓存效果，上次打开保存的数据依然保留着；
解决：在dialog关闭的时候清除数据，
this.$refs[formRef].resetFields();
Object.assign(this.$data, this.$options.data.call(this));
可以封装为全局方法：
// 重置表单，formRef为表单的ref值，excludeFields为要排除重新初始化值得属性
Vue.prototype.$reset = function (formRef, ...excludeFields) {
this.$refs[formRef].resetFields();
let obj1 = this.$data;
let obj2 = this.$options.data.call(this);
if (!excludeFields || excludeFields.length === 0) {
excludeFields = ["ruleValidate"];
}
for (let attrName in obj1) {
if (excludeFields && excludeFields.includes(attrName)) {
continue;
}
obj1[attrName] = obj2[attrName];
}
};
