uniapp使用css实现固定横屏

由于h5无法使用app-plus的属性，只好通过样式实现

直接上代码

html

<view :class="islandscape?'preview-main trans':'preview-main'">
        <u-icon name="arrow-left" size="40"></u-icon>
        内容
</view>

js

export default {
        data() {
            return {
                islandscape:false,//是否横屏
            }
        },
        methods: {
            resize(){
                const width=uni.getWindowInfo().windowWidth;
                const height=uni.getWindowInfo().windowHeight;
                setTimeout(function(){
                    if(width>height){
                        this.islandscape=false;
                        业务逻辑
                    }else{
                        this.islandscape=true;
                        业务逻辑
                    } 
                }.bind(this), 5e2);
            },
            backMethod(){
                uni.navigateBack();
            }
        },
        onLoad(options) {
            const windowResizeCallback = (res) => {
                this.resize();
            }
            uni.onWindowResize(windowResizeCallback)
        }
    }

css

    .preview-main {
        position:relative;
        width: 100vw;
        height: 100vh;
        background-color: black;
        color: #525252;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
    }
    .trans {
      position: absolute;
      top: -100vw;
      width: 100vh;
      height: 100vw;
      transform: rotate(90deg);
      transform-origin: bottom left;
    }

注意：导航栏不会受样式影响，可以自己隐藏再实现导航栏功能

效果如下：