How to solve the stuck problem of mobile gesture zoom and rotate image page in Vue development

How to solve the stuck problem of gesture zoom, rotate, and image pages on the mobile side during Vue development

With the popularity of mobile devices, more and more web applications need to be developed on the mobile side. Among them, picture display is one of the common requirements. In order to improve the user experience, it is often necessary to implement gesture zooming and rotating image functions on the mobile terminal. However, in the process of implementing these functions, page freezes are often encountered. This article will introduce some methods to solve this problem, especially in Vue development.

1. Using CSS transform property

In the process of handling gesture scaling and rotation, many developers tend to use JS to modify the style of images. However, doing so will cause the page to be redrawn and reflowed, causing lag. In contrast, using the CSS transform property can better optimize performance.

In the Vue component, the transform attribute can be set by binding the style object. For example:

<template>
  <div
    :style="{
      transform: `scale(${scale}) rotate(${rotation}deg)`
    }"
  >
    <img src="image.jpg" alt="Image" />
  </div>
</template>

<script>
export default {
  data() {
    return {
      scale: 1,
      rotation: 0
    };
  }
};
</script>

By modifying the values ​​of scale and rotation, the image can be scaled and rotated. Due to the use of the CSS transform property, the page will not be redrawn or reflowed when performing these operations, thereby improving performance.

2. Use hardware acceleration

Mobile devices usually support hardware acceleration, which can accelerate page rendering and animation effects. In Vue development, hardware acceleration can be turned on by setting the CSS property transform: translate3d(0, 0, 0). For example:

<template>
  <div
    :style="{
      transform: `scale(${scale}) rotate(${rotation}deg) translate3d(0, 0, 0)`
    }"
  >
    <img src="image.jpg" alt="Image" />
  </div>
</template>

Apply translate3d(0, 0, 0) to the transform attribute to enable hardware acceleration and further improve the performance of the page.

3. Use virtual scrolling

When the size of the image is large, gesture zooming and rotation on mobile devices may cause the page to freeze. To solve this problem, virtual scrolling can be used to load and display parts of the image.

In Vue development, you can use some third-party plug-ins to achieve virtual scrolling. Common plug-ins include vue-virtual-scroll-list and vue-virtual-scroller. Through these plug-ins, the loading and display of images can be delayed until the user actually needs to browse, thereby reducing the pressure on the page and improving performance.

Summary:

In Vue development, to solve the stuck problem of mobile gesture zoom and rotate image pages, you can use CSS transform attributes, hardware acceleration, virtual scrolling and other methods. Through reasonable optimization, the performance of the page can be improved and provide a better user experience. I hope the content of this article is helpful to you.

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