How to implement data caching and local storage in uniapp

How to implement data caching and local storage in uniapp

In uni-app, we often encounter the need to cache data or store data locally. This article will introduce how to implement data caching and local storage in uni-app, and provide relevant code examples.

1. Data caching

In uni-app, you can use the uni.showLoading and uni.hideLoading methods to implement the data caching function. The uni.showLoading method is used to display the loading prompt box, and the uni.hideLoading method is used to hide the loading prompt box.

The code example is as follows:

1. Display the loading prompt box in the onLoad life cycle function of the page:

onLoad() {
  uni.showLoading({
    title: '数据加载中...',
  });
},

2. After the data is obtained successfully , Hide the loading prompt box:

success(res) {
  // 数据获取成功
  // 隐藏加载提示框
  uni.hideLoading();
},

Through the above method, we can display the loading prompt box during the data acquisition process to improve the user experience.

2. Local Storage

In uni-app, you can use the uni.setStorage and uni.getStorage methods to implement the local storage function. The uni.setStorage method is used to store data locally, and the uni.getStorage method is used to obtain data locally.

Code examples are as follows:

1. Store data locally:

uni.setStorage({
  key: 'key',
  data: 'value',
  success() {
    console.log('数据存储成功');
  },
});

2. Get data from local:

uni.getStorage({
  key: 'key',
  success(res) {
    console.log('获取到的数据为：', res.data);
  },
});

Through the above method, we can store data locally and obtain data from the local when needed, which facilitates the persistent storage of data.

3. Summary

The above is the method to implement data caching and local storage in uni-app. By using the uni.showLoading, uni.hideLoading, uni.setStorage and uni.getStorage methods, we can easily implement data caching and local storage functions. During the actual development process, corresponding adjustments and expansions can be made according to specific needs to meet the needs of the project. I hope this article can be helpful to everyone.

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