Implement image rotation effect in WeChat applet

To implement the image rotation effect in the WeChat applet, specific code examples are required

The WeChat applet is a lightweight application that provides users with a wealth of functionality and good user experience. In mini programs, developers can use various components and APIs to achieve various effects. Among them, the picture rotation effect is a common animation effect that can add interest and visual effects to the mini program.

To achieve the image rotation effect in the WeChat applet, you need to use the animation API provided by the applet. The following is a specific code example that shows how to implement the image rotation effect in the mini program:

First, in the wxml file of the mini program, add an image component and bind a tap event to the component , the code is as follows:

<view class="container">
  <image class="image" src="{{imageUrl}}" mode="aspectFill" bindtap="rotateImage"></image>
</view>

Next, in the js file of the mini program, define a rotateImage function to handle the rotation effect of the image. The code is as follows:

Page({
  data: {
    imageUrl: '/images/image.jpg', // 设置图片地址，可以替换为自己的图片路径
    rotateAngle: 0 // 初始化旋转角度为0
  },

  rotateImage: function () {
    var animation = wx.createAnimation({
      duration: 1000, // 设置动画持续时间
      timingFunction: 'linear' // 设置动画的缓动函数
    })

    animation.rotate(this.data.rotateAngle + 90).step() // 每次旋转90度
    this.setData({
      rotateAngle: this.data.rotateAngle + 90,
      animationData: animation.export()
    })
  }
})

In the above code, we first define a rotateImage function, which will be called when the user clicks on the image. Inside the function, we use the wx.createAnimation method to create an animation object animation, and achieve the image rotation effect through its rotate method. We set the duration of the animation to 1 second and selected a linear easing function. After each 90-degree rotation, we update the image's rotation angle and animation data.

Finally, in the wxss file of the mini program, add a style to the picture component. The code is as follows:

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100vh;
}

.image {
  width: 200rpx;
  height: 200rpx;
  animation: rotation 2s infinite linear; 
}

@keyframes rotation {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}

In the above code, we add a rotation animation to the style of the picture component. Through the @keyframes keyword, we define an animation called rotation, which causes the image to rotate 360 ​​degrees at a constant speed within 2 seconds.

Summary: Through the above code examples, we can see that it is not difficult to achieve the image rotation effect in the WeChat applet. By using the animation API and CSS styles provided by the mini program, we can easily add various animation effects to the mini program to improve the user experience.

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