Qt Multi-threaded File Transfer Tutorial

To create a file transfer project based on Qt multithreading, you can follow these steps:

1. Create a new Qt project by first opening Qt Creator, selecting a new Qt project, and choosing the “Qt Widgets Application” template.
2. Design interface: Create a simple interface with buttons for selecting a file and a target folder, as well as buttons for starting the transfer and cancelling.
3. Write a file transfer class: Create a file transfer class that inherits from QObject, including methods for file selection, file transfer, and thread control.
4. Create multiple threads: Create a QThread object in the main interface and move the file transfer class to this thread.
5. Connect signals and slots: link the click signal of the button in the interface to the slot function of the file transfer class, allowing for file selection and transfer functionality.
6. Implement file transfer function: Implement file selection and transfer functions in the file transfer class, utilizing Qt’s file operation class QFile and network operation class QTcpSocket.
7. Start transfer: When the start transfer button is clicked, initiate a thread and begin file transfer.
8. Cancel transfer: when the cancel button is clicked, stop the file transfer and clean up resources.

By following the above steps, a file transfer project based on Qt multi-threading can be implemented. It is important to pay attention to communication between threads and resource management during the implementation in order to ensure the stability and performance of the program.