template代码

<view class="header" :style="style">
			<view class="flexbox"
				:style="[{'height': customBarH + 'px', 'padding-top': statusBarH + 'px', 'color': titleColor, 'background': bgColor}]">
				<view>
					<slot name="back">返回</slot>
				</view>
				<view>标题</view>
				<view style="width: 36px;"></view>
			</view>
		</view>

script代码

<script>
    export default {
        data() {
            return {
                statusBarH: 0,
                customBarH: 0
            }
        },
        props: {
            title: { type: String, default: '' },
            titleColor: { type: String, default: '#000000' },
            bgColor: { type: String, default: '#ffffff' },
        },
        computed: {
            style() {
                let _style = `height: ${this.customBarH}px;`
                return _style
            }
        },
        methods: {
            goBack() {
                uni.navigateBack()
            }
        },
		created() {
			let self = this;
            // 获取系统信息
			uni.getSystemInfo({
			    success:function(e){
                    // 获取状态栏高度
			        self.statusBarH = e.statusBarHeight + 10
                    // 获取菜单按钮栏高度
			        let custom = wx.getMenuButtonBoundingClientRect()
			        self.customBarH = custom.height + 10
			    }
			})
		}
    }
</script>

css代码

.header{
			width: 100vw;
			position: relative;
			z-index: 10;
		}
		.flexbox{
			display: flex;
			justify-content: space-between;
			padding: 0 20px;
		}

	.status_left {
		width: 18px !important;
	}

	.status_center {
		font-size: 17px;
		font-weight: 700;
	}

	.status_right {
		width: 22px;
	}

效果：