优化ios版本，新增注销账号功能

pages/index/index.vue

@@ -140,7 +140,7 @@
 						</view>
 					</u-count-down>
 				</view>
-				<image class="ad-img" :src="layAdImg" mode="widthFix"></image>
+				<image class="ad-img" :src="layAdImg" mode="heightFix"></image>
 				<view class="ad-btn">
 					<u-icon
 						class="ad-btn-icon"
@@ -318,8 +318,8 @@
 	}
 	// ad弹窗广告
 	.ad-lay{
-		width: 70vw;
 		position: relative;
+		text-align: center;
 		.ad-down{
 			position: absolute;
 			top: 20rpx;
@@ -337,7 +337,7 @@
 			}
 		}
 		.ad-img{
-			width: 70vw;
+			height: 75vh;
 			border-radius: 20rpx;
 		}
 		.ad-btn{
@@ -498,8 +498,6 @@
         white-space: nowrap;
         width: calc(100% - 60rpx);
 		&-item{
-			position: relative;
-			z-index: 2;
 			width: 25%;
 			line-height: 60rpx;
 			text-align: center;
@@ -507,18 +505,22 @@
 			color: #454545;
 			transition: all .4s;
             display: inline-block;
+			background-color: transparent;
 			&.active{
 				color: white;
+				position: relative;
+				z-index: 2;
 			}
 		}
 		&-acitve-block{
             display: inline-block;
 			width: 25%;
 			height: 60rpx;
-			background: linear-gradient( to right, #d51959, #ec7247);
+			background-image: linear-gradient( to right, #d51959, #ec7247);
 			border-radius: 35rpx;
 			position: absolute;
 			left: 0;
+			top: 0;
 			transition: all .4s;
 		}
 	}