import { ModalProps, StyleProp, ViewStyle } from 'react-native';
/**
 * handy when you need calculate item width in flex-wrap layout
 * @param countOfEachRow how many item you want to place on each row
 * @param itemMargin the distance between two item
 * @param eachRowWidth width of each row
 * usage : calculateFlexWrapItemWidth(4, getRealWidth(20), getRealWidth(76) * 2)
 */
export declare function calculateFlexWrapItemWidth(countOfEachRow: number, itemMargin: number, eachRowWidth: number): number;
export declare const STATUSBAR_PADDING_FOR_NEED: any;
/**
 * 全局弹出Modal的样式，为了统一风格，沉浸式状态栏
 */
export declare const globalModalStyle: ModalProps;
/**
 * handy style let view row center
 */
export declare const horizontalCenter: StyleProp<ViewStyle>;
/**
 * handy style let view vertical center
 */
export declare const verticalCenter: StyleProp<ViewStyle>;