uniapp 中 修改 placeholder默认字体颜色

<input placeholder-class="phcolor" placeholder="请输入" v-model="bankNum" type="number" />

class phcolor 放在App.vue中就可以了

<style lang="less">
	page {
		background-color: #f5f5f5;
	}
	.phcolor {
		color: #999;
		font-size: 30rpx;
	}
</style>