How to draw horizontal lines using Uniapp

It is not difficult to draw a horizontal line in Uniapp. You can draw a horizontal line through some simple codes. If you want to learn how to draw horizontal lines using Uniapp, please follow this article.

1. Use CSS to draw horizontal lines

We can draw horizontal lines by using CSS in tags. With the following code snippet, we can easily draw a horizontal line in our Uniapp page:

// 样式
.line {
  border-bottom: 1px solid #000; // 下边框
  height: 1px;
  margin-top: 10px;
}
// html
<view></view>

The style class "line" in the above code defines a lower border with a height of 1 pixel and a distance of 1 pixel from the top Horizontal lines at a distance of 10 pixels. We just need to use view tag in html.

2. Use canvas to draw horizontal lines

You can also use canvas to draw horizontal lines in Uniapp. We can do this by calling the canvas API. Through the following code snippet, we can draw a horizontal line:

// html
<canvas></canvas>
// js
onReady() {
  const query = uni.createSelectorQuery().in(this);
  query.select('#first-canvas').fields({
    node: true,
    size: true,
  }).exec((res) => {
    const canvas = res[0].node;
    const ctx = canvas.getContext('2d');
    const dpr = uni.getSystemInfoSync().pixelRatio;
    canvas.width = res[0].width * dpr;
    canvas.height = res[0].height * dpr;
    ctx.lineWidth = 1 * dpr;
    ctx.strokeStyle = '#000000';
    ctx.beginPath();
    ctx.moveTo(0, 100 * dpr);
    ctx.lineTo(canvas.width, 100 * dpr);
    ctx.stroke();
  });
}

In the above code, we define a canvas area and use querySelector to obtain it. By calling the API, we can obtain the context of the canvas, and then draw the lines we need through the context.

3. Summary

Through the above two methods, we can draw a horizontal line in Uniapp. Using CSS is relatively simple and only requires defining some styles, while using canvas requires more specific drawing code.

Generally speaking, both methods have their own advantages and disadvantages, and the specific use should be chosen according to the actual situation. Through this article, I believe you already have a certain understanding of how to use Uniapp to draw horizontal lines.

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