uniapp 常用高度状态栏，导航栏，tab栏，底部安全高度

实际效果

        // 入参 是否转换为rpx
        getPosConfig(toRpx = true) {
				const systemInfo = uni.getSystemInfoSync();
				// #ifdef MP
				const menuButtonInfo = uni.getMenuButtonBoundingClientRect();
				// #endif
				const posConfig = {
					statusBarH: systemInfo.statusBarHeight,//状态栏高度
					tabBarH: systemInfo.screenHeight - systemInfo.windowHeight,//底部tab高度
					safeBottomH: systemInfo.safeAreaInsets.bottom,//底部安全高度
					// #ifdef MP
					capsuleH: menuButtonInfo.height, //胶囊高度
					capsuleW: menuButtonInfo.width, //胶囊宽度
					capsuleGap: menuButtonInfo.top - systemInfo.statusBarHeight, // 胶囊到状态栏的间隔
					customBarH: menuButtonInfo.height + (menuButtonInfo.top - systemInfo.statusBarHeight) * 2, //自定义导航栏高度
					customBarW: menuButtonInfo.left, // 自定义导航栏宽度
					// #endif
				}
				if (toRpx) {
					const ratio = 750 / systemInfo.windowWidth;
					for (let key in posConfig) {
						posConfig[key] *= ratio;
					}
				}
				return posConfig;
}