阿尔敏成了巨大巨人，团长也死了

//隐藏logo

//网上大多数写法都是这样，但是不行
   [_mapView.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        if ([obj isKindOfClass:[UIImageView class]]) {

            UIImageView * logoM = obj;

            logoM.layer.contents = (__bridge id)[UIImage imageNamed:@""].CGImage;
//            logoM.layer.contents = (__bridge id)[UIImage imageWithColor:[UIColor clearColor]].CGImage;
//            logoM.hidden = YES;
        }
    }];
    //用这个可以，，
    for (UIView *view in _mapView.subviews) {
        if ([view isKindOfClass:[UIImageView class]]) {
            [view removeFromSuperview];
        }
    }