How to clear interface data in uniapp

UniApp is a cross-platform development framework that can quickly transform code into programs that can run on multiple platforms. In a UniApp application, interface data is a very important part. What should we do if we need to clear interface data in our application? Next, I will introduce to you how to clear interface data in uniapp.

The method of clearing interface data in UniApp is generally achieved by modifying the vuex status of the application. Below we will explain this method in detail through a small example.

First we need to create a state variable in vuex to store interface data. The code is as follows:

// store/index.js

const state = {
  apiData: null
}

const mutations = {
  SET_APIDATA: (state, payload) => {
    state.apiData = payload
  }
}

const actions = {
  setApiData: ({ commit }, data) => {
    commit('SET_APIDATA', data)
  }
}

export default new Vuex.Store({
  state,
  mutations,
  actions
})

In mutation we created a SET_APIDATA method to modify the apiData variable in state. In the action, we created a setApiData method to trigger the SET_APIDATA method in mutation and save the data to apiData middle.

Next we get the interface data from the page and save the data to the vuex state. In the method of obtaining data, we call the action method of store to save the data to the apiData state. The code is as follows:

// pages/index.vue

export default {
  data() {
    return {
      apiData: null
    }
  },

  methods: {
    async fetchData() {
      const res = await uni.request({
        url: '/api/data'
      })

      this.apiData = res.data
      this.$store.dispatch('setApiData', res.data)
    },

    clearApiData() {
      this.apiData = null
      this.$store.dispatch('setApiData', null)
    }
  }
}

In the fetchData method, we call the uni.request method to obtain the interface data. After obtaining the data, we saved the data to the apiData variable and called the setApiData method of store to save the data to vuex.

In the clearApiData method, we set the apiData variable to null and call the setApiData method to clear the data stored in vuex .

Next, in the page, we can realize automatic clearing of data by monitoring the apiData variable in the vuex state. The code is as follows:

// pages/index.vue

export default {
  computed: {
    apiData() {
      return this.$store.state.apiData
    }
  },

  watch: {
    apiData(newValue) {
      if (newValue === null) {
        // 数据清空
      }
    }
  }
}

When the apiData variable in the vuex state becomes null, we can perform the data clearing operation.

To sum up, it is a common and simple way to clear the interface data by modifying the vuex status. However, in actual applications, the specific emptying method needs to be designed and adjusted according to specific circumstances.

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