原来连线的button也给删除掉了，

 for (UIView *view in [picView subviews]) {

            [view removeFromSuperview];

    }

 

for (UIView *view in [picView subviews]) {

        if (view.tag != 1010) {

            [view removeFromSuperview];

        }

    }

转载于:https://www.cnblogs.com/guligei/p/3487186.html