自定义Taro的navBar的宽度和高度

本方法是计算自定义navbar的宽度和高度，输出的参数有
navBarHeight, menuBottom,menuHeight, menuRectWidth,windowWidth, windowHeight,具体代码如下：

export function getCustomNavBarRect():| {navBarHeight: number;menuBottom: number;menuHeight: number;menuRectWidth: number;windowWidth: number;windowHeight: number;}| undefined {const { statusBarHeight = 0, screenWidth, windowWidth, windowHeight } = Taro.getSystemInfoSync();const menuButtonInfo = Taro.getMenuButtonBoundingClientRect();const navBarHeight =(menuButtonInfo.top - statusBarHeight) * 2 + menuButtonInfo.height + statusBarHeight; // 导航栏高度const menuBottom = menuButtonInfo.top - statusBarHeight; // 胶囊距底部间距（顶部间距也是这个）const menuHeight = menuButtonInfo.height; // 胶囊高度const menuRectWidth = screenWidth - menuButtonInfo.left; // 胶囊宽度（包括距离屏幕右侧的距离）const barRect = {navBarHeight,menuBottom,menuHeight,menuRectWidth,windowWidth,windowHeight,};if (Taro.getStorageSync('customNavBarRect')) return Taro.getStorageSync('customNavBarRect');Taro.setStorageSync('customNavBarRect', barRect);return barRect;
}