monitorsystem.cpp:292:5: error: no matching function for call to 'number' qstring.h:757:20: note: candidate function not viable: no known conversion from 'quint8 [6]' to 'int' for 1st argument qstring.h:758:20: note: candidate function not viable: no known conversion from 'quint8 [6]' to 'uint' (aka 'unsigned int') for 1st argument qstring.h:759:20: note: candidate function not viable: no known conversion from 'quint8 [6]' to 'long' for 1st argument qstring.h:760:20: note: candidate function not viable: no known conversion from 'quint8 [6]' to 'ulong' (aka 'unsigned long') for 1st argument qstring.h:761:20: note: candidate function not viable: no known conversion from 'quint8 [6]' to 'qlonglong' (aka 'long long') for 1st argument qstring.h:762:20: note: candidate function not viable: no known conversion from 'quint8 [6]' to 'qulonglong' (aka 'unsigned long long') for 1st argument qstring.h:763:20: note: candidate function not viable: no known conversion from 'quint8 [6]' to 'double' for 1st argument
时间: 2024-03-11 11:48:05 浏览: 550
fatal error: boostdesc_bgm.i: No such file or directory补充文件
这个错误提示是因为在调用 QString::number() 函数时,将一个 quint8 数组作为参数传递给了该函数,但是 QString::number() 函数没有接受 quint8 数组作为参数的重载函数。
如果要将 quint8 数组转换为 QString 类型,可以使用 QByteArray 类型的 fromRawData() 函数和 QString 的构造函数。具体做法如下:
```
quint8 a[6] = {1, 2, 3, 4, 5, 6};
int size = sizeof(quint8) * 6;
QString result = QString::fromUtf8(QByteArray::fromRawData(reinterpret_cast<const char*>(a), size), size);
// result 的值为 ""
```
在这个例子中,fromRawData() 函数接受两个参数:一个指向字符数组的指针和数组的大小。首先将 quint8 数组转换为 char 数组的指针,然后使用该指针和数组的大小作为参数调用 fromRawData() 函数,得到一个 QByteArray 类型的对象。接着使用 QString 的构造函数将 QByteArray 类型的对象转换为 QString 类型的字符串。需要注意的是,构造函数的第二个参数指定的是字符串的长度。在这个例子中,由于 quint8 数组的大小为 6,因此字符串的长度也应该为 6。
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