How does uniapp determine whether the device is a mobile phone or a tablet?

With the popularity of mobile devices, more and more applications need to be able to automatically adapt to different devices. When developing uniapp applications, sometimes you need to execute different code depending on the device type. This article will introduce how to use uniapp to determine whether the device is a mobile phone or a tablet.

What is uniapp?

Uniapp is a technology for developing cross-platform applications using the Vue.js framework. It supports compiling code into iOS, Android, H5, and applets, and quickly builds applications that can be used on multiple platforms. uniapp provides a complete set of APIs that allow developers to build applications for multiple platforms using one set of code.

How to determine the device type

In the uniapp application, there are two ways to determine the device type: one is to use the API officially provided by uniapp, and the other is to use the JavaScript native method.

Use uniapp official API

uniapp provides a uni.getSystemInfoSync() method, which can return the system information of the current device. These include device brand, device model, device pixel ratio, etc. This method can be used to easily obtain device information to determine the device type.

The following is a simple code example that compares the screen width and height to determine whether the current device is a phone or a tablet:

export default {
  data() {
    return {
      isTablet: false
    }
  },
  methods: {
    detectDeviceType() {
      let systemInfo = uni.getSystemInfoSync();
      let screenWidth = systemInfo.screenWidth;
      let screenHeight = systemInfo.screenHeight;
      if (screenWidth > 480 && screenWidth / screenHeight < 0.75) {
        this.isTablet = true;
      }
    }
  },
  mounted() {
    this.detectDeviceType();
  }
}

Using JavaScript native methods

In addition to using uniapp In addition to the provided API, you can also use JavaScript native methods to determine the device type. The following is a code example that uses native methods to determine:

export default {
  data() {
    return {
      isTablet: false
    }
  },
  methods: {
    detectDeviceType() {
      if (/android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test(navigator.userAgent.toLowerCase())) {
        this.isTablet = false;
      } else {
        this.isTablet = true;
      }
    }
  },
  mounted() {
    this.detectDeviceType();
  }
}

Summary

In this article, we introduced how to use the uniapp API and JavaScript native methods to determine the device type in the uniapp application. Using these methods can easily adapt applications on different devices and provide a better user experience.

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