Undoubtedly, this is one of the most common issues we will meet when use our iPhone. From my experience, we can try the following solutions:
1. Force restart or reboot iPhone;
2. Restore iPhone in DFU mode;
3. Restore iPhone in Recovery mode;
4. Losslessly recover the system with
iPhone system recovery [joyoshare.com]
More details:
Fix iPhone Stuck on Apple Logo [joyoshare.com]