qimage转qbytearray

回答: 将QImage转换为QByteArray的方法可以参考以下代码示例：QImage image; QByteArray ba; QBuffer buffer(&ba); buffer.open(QIODevice::WriteOnly); image.save(&buffer, "JPG"); \[3\]这段代码中，首先创建了一个QImage对象image和一个QByteArray对象ba，然后创建了一个QBuffer对象buffer，并将其与ba关联。接下来，通过调用buffer的open函数打开QIODevice::WriteOnly模式，然后调用image的save函数将图像保存到buffer中，格式为JPG。最后，QByteArray对象ba中就存储了QImage对象image的数据。
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