Well most of you have seen photo on facebook posted via iOS well as we all know this possible only through apple iPad or iPhone or apple iPod touch

Well for your post  you will need ios 5 or more

2nd most important thing you devices must connect to Internet

Step 1.

Go to setting 

Step2.

 Search facebook 

Step4.

Sign in your facebook I'd 

Step5.

Go to photos

Step6

Open any photo 

Step7

Tap on box with arrow outside 

Step 8.

After selecting some photos you will option of twitter ,facebook etc

After taping on facebook you will option to write and

Last step just tap on post that's it...