updateParagraphSpacing method Null safety

Future<bool> updateParagraphSpacing(
  1. double paragraphSpacing
)

更新字符间距 字体大小

iOS独有

Implementation

Future<bool> updateParagraphSpacing(double paragraphSpacing) async {
  if (!Platform.isIOS) {
    return false;
  }
  if (paragraphSpacing < 0) {
    return false;
  }
  bool ret = await BMFMapDispatcherFactory.instance.overlayDispatcher
      .updateTextMember(this.methodChannel, {
    'id': this.id,
    'member': 'paragraphSpacing',
    'value': paragraphSpacing
  });
  if (ret) {
    this.paragraphSpacing = paragraphSpacing;
  }
  return ret;
}