C++ Qt/C++；-如何从字符串中删除整行？

我使用

QString:：remove（QString）

从字符串中删除特定的行，但有一个小问题，即删除的字符串并没有真正删除，而是替换为空字符串。我想把整条线都拆了

原始字符串：

...
Hi there,
Alaa Joseph is here!
The above line is going to be removed :P

It's the magic of C++ :]
...

...
Hi there,

The above line is going to be removed :P

It's the magic of C++ :]
...

以下是我尝试过的：

test1 = originalString.replace("Alaa Joseph is here!", "");
test2 = originalString.remove("Alaa Joseph is here!");  // Same result as the previous

输出：

...
Hi there,
Alaa Joseph is here!
The above line is going to be removed :P

It's the magic of C++ :]
...

...
Hi there,

The above line is going to be removed :P

It's the magic of C++ :]
...

如上所示，它删除了文本而没有删除整行

---

我需要输出如下：

...
Hi there,
The above line is going to be removed :P

It's the magic of C++ :]
...

我知道我可以遍历每一行并执行以下操作：

QStringList list = test1.split("\n");

list.removeAt(0);
int n = list.length();
list.removeAt(n - 1);

QString noEmptyLines = list.join("\n");

但是我不想删除所有的空行，只删除那些我删除了内容的空行，因为这会破坏我文档的整个格式。

试试这个：

test2 = originalString.remove("Alaa Joseph is here!\n"); 

这将删除

\n

，您将获得正确的输出

如果你的任务有一些规范，你可以检查你应该做什么。例如：

if(originalString.contains("Alaa Joseph is here!\n") )
    test2 = originalString.remove("Alaa Joseph is here!\n");
else
    if(originalString.contains("Alaa Joseph is here!"))
        test2 = originalString.remove("Alaa Joseph is here!"); 

---

如果您确信

\n

始终在您的

字符串中，您可以避免使用此附加代码。
“它删除了文本，而没有删除整行！”否。它删除了行的文本，直到回车符，回车符是行的一部分。“\n”是字符本身。