第一个思路：找到LOGO对应的UIIMageView,并将其隐藏hidden
// 隐藏百度地图Logo
UIView *mView = _mapView.subviews.firstObject;
for (id logoView in mView.subviews)
{
if ([logoView isKindOfClass:[UIImageView class]])
{
UIImageView *b_logo = (UIImageView*)logoView;
b_logo.hidden = YES;
}
}