uniapp样式动态绑定

场景一：用户点击按钮后动态切换按钮选中样式（如图）

<view class="state-btn-content">
    <view @tap="selectState" data-state="over" :class="[whichSelected=='over'?'state-btn-selected':'state-btn-noselect']">已上线</view>
    <view @tap="selectState" data-state="pre" :class="[whichSelected=='pre'?'state-btn-selected':'state-btn-noselect']">未开始</view>
</view>



//选择状态
selectState(e){
    this.whichSelected=e.currentTarget.dataset.state
}



.state-btn-content{
    //write your style
    .state-btn-selected{ ... }
    .state-btn-noselect{ ... }
}

注：需要注意的就是一个标签里尽量不要同时用静态class与动态class，可能会造成兼容问题。最好只是用一种方式的，如上代码里为了实现动态改变样式只使用了:class
错误示范：<view @click="selectState" data-state="over" class="state-btn-noselect" :class="[whichSelected=='over'?'state-btn-selected':'']">已上线</view>

场景二：给标签渲染多种颜色（如图）

<view :class="['every-sign-item',`signstyle-${index%6}`]" v-for="(item,index) in preSignList" :key="index">{{item.name}}</view>


.every-sign-item{
	padding: 4rpx 16rpx;
	border-radius: 24rpx;
	font-size: 24rpx;
	margin-right: 20rpx;
	margin-bottom: 20rpx;
}
.signstyle-0{
	color: #3ac9e3;
	border: 1px solid #3ac9e3;
}
.signstyle-1{
	color: #fd8888;
	border: 1px solid #fd8888;
}
.signstyle-2{ ... }
.signstyle-3{ ... }
.signstyle-4{ ... }
.signstyle-5{ ... }