{

        ////ios 7 弹窗

//    UIAlertView *alert1=[[UIAlertView alloc]

//        initWithTitle:@"tishi"

//        message:@" ni shu ru de zhi bu zhengque"

//       delegate:nil

//       cancelButtonTitle:@"qu xiao"

//                         otherButtonTitles:nil, nil];

      // [alert1 show];

        //ios 8 的弹窗

        UIAlertController *alert2=[UIAlertController alertControllerWithTitle:@"提示" message:@"你输入的值不正确！" preferredStyle:UIAlertControllerStyleAlert];

        [alert2 addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil]];

        [self presentViewController:alert2 animated:NO completion:nil];