vue父级组件调用子级组件方法   https://blog.csdn.net/weixin_41916005/article/details/83860235 

this.$refs.mychild.子页面方法();

父子互传

https://blog.csdn.net/lander_xiong/article/details/79018737?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.control&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.control