i have a arduino uno and i will connect my 2.2" tft display that i buy here to the arduino:
i found images on the ethernet but i will answer it here, why:
i found how to connect 8 pin screens to arduino but never i see a schematic and i have a 9 pin screen.
can any tell how to connect my screen to my arduino uno please?
If you look at the links that feveran provide you will see that the screen that is used in those links is exactly like your. Yes, your screen which has 9 pins will work and yes the adafruit library will work.
Keep in mind that the signal to the screen must be 3V and not 5V. Depending on what arduino you have you will need a level shifter or not.