message: ios button fix
diff: @@ -136,8 +136,8 @@ export default class Button extends NativeBaseComponent {
  (this.props.small) ? this.getTheme().iconSizeSmall :
  (this.props.inputButton) ? this.getTheme().toolbarIconSize :
  (this.props.fabButton) ? 22 :
  - (this.props.header) ? this.getTheme().iconFontSize : this.getTheme().iconFontSize-5,
  - lineHeight: (this.props.large) ? 52: (this.props.small || this.props.inputButton) ? 22 : this.getTheme().iconLineHeight-9
  + (this.props.header) ? this.getTheme().iconFontSize+2 : this.getTheme().iconFontSize-5,
  + lineHeight: (this.props.large) ? 52 : (this.props.small || this.props.inputButton) ? 22 : (this.props.header) ? 36 : this.getTheme().iconLineHeight-9
  }
  var defaultProps = {
  