Improved type definitions

Closes #4

lib/ts/index.d.ts

@@ -1,21 +1,52 @@
-import { Component } from 'react';
-
-interface Props {
-  options: (string | React.ReactNode)[];
-  onPress: (index: number) => void;
-  title?: string;
-  message?: string;
-  tintColor?: string;
-  cancelButtonIndex?: number;
-  destructiveButtonIndex?: number;
-  styles?: object;
+import React, { Component } from 'react';
+import { TextStyle, ViewStyle } from 'react-native';
+
+type Props = {
+	options: string[];
+	onPress: (index: number) => void;
+	title?: string;
+	message?: string;
+	tintColor?: string;
+	cancelButtonIndex?: number;
+	destructiveButtonIndex?: number;
+	/**
+	 * Only for Android or ActionSheetCustom
+	 */
+	styles?: {
+		titleBox?: ViewStyle,
+		titleText?: TextStyle,
+
+		messageBox?: ViewStyle,
+		messageText?: TextStyle,
+
+		buttonText?: TextStyle,
+		buttonBox?: ViewStyle,
+		cancelButtonBox?: ViewStyle,
+
+		overlay?: TextStyle,
+		wrapper?: ViewStyle,
+		body?: ViewStyle,
+	};
+}
+
+type ActionSheetProps = Props & {
 	/**
 	 * iOS only, change default theme
 	 * @default system theme color
 	 */
 	userInterfaceStyle?: "light" | "dark"
 }
 
-export default class ActionSheet extends Component<Props> {
-  public show: () => void;
+export default class ActionSheet extends Component<ActionSheetProps> {
+	public show: () => void;
 }
+
+type ActionSheetCustomProps = Props | {
+	title?: string | React.ReactNode
+	message?: string | React.ReactNode
+	options: (string | React.ReactChild)[]
+}
+
+export class ActionSheetCustom extends Component<ActionSheetCustomProps> {
+	public show: () => void;
+}