1.直接store中dispatch

export default {
  methods: {
    clickFn() {
      this.$store.dispatch("sampleFn") //不带参
      this.$store.dispatch("withParamFn",param) //带参,param为参数
    }
  }
};

2.使用mapActions取值

import { mapActions } from "vuex";

export default {
  methods: {
    ...mapActions([
      "sampleFn", // 将 `this.sampleFn()` 映射为 `this.$store.dispatch('sampleFn')`
      "withParamFn" // 将`this.withParamFn(param)`映射为`this.$store.dispatch('withParamFn', param)`
    ]),
    ...mapActions({
      newFn: "sampleFn" // 将`this.newFn()`映射为`this.$store.dispatch('sampleFn')`
    }),
  }
 }

3.使用module中的actions

module中的actions，又分为namespaced（命名空间）为true和false的情况。默认为false,则表示方位都是全局注册，与上边两种方法一致。当为true时，则使用如下方法：

import { mapState, mapActions } from "vuex";

export default {
  methods: {
    ...mapActions([
      "moduleA/sampleFn" // -> this['moduleA/sampleFn']()
    ]),
    ...mapActions("moduleA", [
      "sampleFn" // -> this.sampleFn()
    ]),
    clickFn() {
      this.$store.dispatch("moduleA/sampleFn"); // 直接从store中dispatch
    }
  }
};

// 使用createNamespacedHelpers函数
import { createNamespacedHelpers } from "vuex";
const { mapActions } = createNamespacedHelpers("moduleA");

export default {
  methods: {
    ...mapActions([
      "sampleFn" // -> this.sampleFn()
    ])
  }
}