Vue realizes the effect of image width 100% and height adaptation

To realize the effect of image width 100% and height self-adaptation, it can be achieved through the following steps:
1. Set the mode attribute on the image component to widthFix, which means scaling according to the width of the image and ensuring that the image width is 100%.
2. Set the style attribute on the image component, and set the height adaptive for the image; you can use the height: auto attribute of CSS to achieve.

<template>
  <view class="container">
    <image class="img" mode="widthFix" :src="imageUrl" :style="{ height: imgHeight + 'px' }" @load="onImgLoad" />
  </view>
</template>

<script>
export default {
  data() {
    return {
      imageUrl: 'https://picsum.photos/400/300',
      imgHeight: 0,
    };
  },
  methods: {
    onImgLoad(e) {
      // 当图片加载完成后，获取图片的原始宽度和高度，并根据宽度计算出高度
      const { width, height } = e.mp.detail;
      this.imgHeight = (height / width) * 100; // 高度 = 原始高度 / 原始宽度 * 100
    },
  },
};
</script>

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

.img {
  width: 100%;
}
</style>

practice

	<!-- 我要入驻 -->
		<view class="settleIn" @click="goto('/pages/business/settleIn/settleIn')">
			<image class="img" mode="widthFix" :src="settleInImageSrc" :style="{ height: imgHeight + 'px' }"
				@load="onImgLoad" />
		</view>

data(){
    return:{
        // 申请入驻图片
				settleInImageSrc: "",
				imgHeight: 0,
    }
}

methods:{
        // 图片自适应
			onImgLoad(e) {
				// 当图片加载完成后，获取图片的原始宽度和高度，并根据宽度计算出高度
				const {
					width,
					height
				} = e.mp.detail;
				this.imgHeight = (height / width) * 100; // 高度 = 原始高度 / 原始宽度 * 100
			},
    
}

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

	.img {
		width: 100%;
	}

Effect