OC-彈出提示框

UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"提示" message:@"确定要送出嗎？" preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction * cancelAc = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
            //點選取消要執行的代碼
        }];
        UIAlertAction *comfirmAc = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
            //點選确定要執行的代碼
        }];
        [alertVC addAction:cancelAc];
        [alertVC addAction:comfirmAc];
        [self presentViewController:alertVC animated:YES completion:nil];