R524809
33 lines
966 B
TypeScript
33 lines
966 B
TypeScript
/**
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* 导航栏内容区高度（px）。
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* 基于胶囊按钮位置计算：让 inner 的垂直中心与胶囊中心对齐，
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* inner_height = (capsule.top - statusBarHeight) * 2 + capsule.height。
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* 默认值 44 仅作兜底。
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*/
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let cachedInnerPx: number | null = null;
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function computeInnerPx(): number {
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try {
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const { statusBarHeight } = wx.getWindowInfo();
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const rect = wx.getMenuButtonBoundingClientRect();
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const inner = (rect.top - statusBarHeight) * 2 + rect.height;
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if (inner > 0 && Number.isFinite(inner)) {
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return Math.round(inner);
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}
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} catch (e) {
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// ignore, fallback below
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}
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return 44;
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}
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export function getNavInnerPx(): number {
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if (cachedInnerPx === null) {
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cachedInnerPx = computeInnerPx();
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}
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return cachedInnerPx;
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}
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/** 兼容旧调用：保留常量导出，启动时取一次胶囊几何。 */
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export const NAV_INNER_PX = getNavInnerPx();
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