4 files changed, 98 insertions, 0 deletions
diff --git a/components/ui/IconSymbol.ios.tsx b/components/ui/IconSymbol.ios.tsx
new file mode 100644
index 0000000..9177f4d
--- /dev/null
+++ b/components/ui/IconSymbol.ios.tsx
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+import { SymbolView, SymbolViewProps, SymbolWeight } from 'expo-symbols';
+import { StyleProp, ViewStyle } from 'react-native';
+
+export function IconSymbol({
+  name,
+  size = 24,
+  color,
+  style,
+  weight = 'regular',
+}: {
+  name: SymbolViewProps['name'];
+  size?: number;
+  color: string;
+  style?: StyleProp<ViewStyle>;
+  weight?: SymbolWeight;
+}) {
+  return (
+    <SymbolView
+      weight={weight}
+      tintColor={color}
+      resizeMode="scaleAspectFit"
+      name={name}
+      style={[
+        {
+          width: size,
+          height: size,
+        },
+        style,
+      ]}
+    />
+  );
+}
diff --git a/components/ui/IconSymbol.tsx b/components/ui/IconSymbol.tsx
new file mode 100644
index 0000000..b7ece6b
--- /dev/null
+++ b/components/ui/IconSymbol.tsx
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+// Fallback for using MaterialIcons on Android and web.
+
+import MaterialIcons from '@expo/vector-icons/MaterialIcons';
+import { SymbolWeight, SymbolViewProps } from 'expo-symbols';
+import { ComponentProps } from 'react';
+import { OpaqueColorValue, type StyleProp, type TextStyle } from 'react-native';
+
+type IconMapping = Record<SymbolViewProps['name'], ComponentProps<typeof MaterialIcons>['name']>;
+type IconSymbolName = keyof typeof MAPPING;
+
+/**
+ * Add your SF Symbols to Material Icons mappings here.
+ * - see Material Icons in the [Icons Directory](https://icons.expo.fyi).
+ * - see SF Symbols in the [SF Symbols](https://developer.apple.com/sf-symbols/) app.
+ */
+const MAPPING = {
+  'house.fill': 'home',
+  'paperplane.fill': 'send',
+  'chevron.left.forwardslash.chevron.right': 'code',
+  'chevron.right': 'chevron-right',
+} as IconMapping;
+
+/**
+ * An icon component that uses native SF Symbols on iOS, and Material Icons on Android and web.
+ * This ensures a consistent look across platforms, and optimal resource usage.
+ * Icon `name`s are based on SF Symbols and require manual mapping to Material Icons.
+ */
+export function IconSymbol({
+  name,
+  size = 24,
+  color,
+  style,
+}: {
+  name: IconSymbolName;
+  size?: number;
+  color: string | OpaqueColorValue;
+  style?: StyleProp<TextStyle>;
+  weight?: SymbolWeight;
+}) {
+  return <MaterialIcons color={color} size={size} name={MAPPING[name]} style={style} />;
+}
diff --git a/components/ui/TabBarBackground.ios.tsx b/components/ui/TabBarBackground.ios.tsx
new file mode 100644
index 0000000..495b2d4
--- /dev/null
+++ b/components/ui/TabBarBackground.ios.tsx
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+import { useBottomTabBarHeight } from '@react-navigation/bottom-tabs';
+import { BlurView } from 'expo-blur';
+import { StyleSheet } from 'react-native';
+
+export default function BlurTabBarBackground() {
+  return (
+    <BlurView
+      // System chrome material automatically adapts to the system's theme
+      // and matches the native tab bar appearance on iOS.
+      tint="systemChromeMaterial"
+      intensity={100}
+      style={StyleSheet.absoluteFill}
+    />
+  );
+}
+
+export function useBottomTabOverflow() {
+  return useBottomTabBarHeight();
+}
diff --git a/components/ui/TabBarBackground.tsx b/components/ui/TabBarBackground.tsx
new file mode 100644
index 0000000..70d1c3c
--- /dev/null
+++ b/components/ui/TabBarBackground.tsx
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+// This is a shim for web and Android where the tab bar is generally opaque.
+export default undefined;
+
+export function useBottomTabOverflow() {
+  return 0;
+}