修改分享好友页面，增加海报保存按钮

me/detail/detailIOS.nvue

@@ -5,7 +5,7 @@
 			<swiper-item class="swipers-item" v-for="(item,index) in swiperList" :key="item.courseDetailsId">
 				<view class="swipers-items" v-if="current == index">
 					<!-- 视频 -->
-					<video :show-fullscreen-btn="false" @controlstoggle="controlstoggles" object-fit="cover"
+					<video :show-fullscreen-btn="false" @controlstoggle="controlstoggles" object-fit="contain"
 						v-if="current === index && item.videoUrl" :play-strategy="2" :show-loading="true"
 						codec="software" :muted="false" :show-center-play-btn="true" :loop="true" @ended="ended"
 						@timeupdate="timeupdate"
@@ -17,7 +17,7 @@
 						mode="aspectFill">
 					</image>
 					<!-- 返回图标 -->
-					<image src="../static/nvueIcon/backs.png" @click="goBack()" class="swipers-items-back" mode="">
+					<image v-if="showBack" src="../static/nvueIcon/backs.png" @click="goBack()" class="swipers-items-back" mode="">
 					</image>
 					<!-- 右边操作 -->
 					<view class="swipers-items-right" :style="rightTop" v-if="showControls">
@@ -303,6 +303,7 @@
 	export default {
 		data() {
 			return {
+				showBack:false,
 				nowBs: 1, //当前倍速
 				subList: [{
 					name: '0.5x',
@@ -850,6 +851,7 @@
 			//显示/隐藏适配控制器的回调
 			controlstoggles(e) {
 				this.showControls = e.detail.show
+				this.showBack=!this.showBack
 				console.log(e.detail.show, '显示/隐藏控制栏')
 			},
 			//打开倍速弹框