if ( [self.delegate respondsToSelector:@selector(finishOp:)]) {
[self.delegate finishOp:self.copyerlistAry];
}
// 从下往上数
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:2] animated:YES];
原文：http://www.cnblogs.com/lisen-lisen/p/4685767.html