How to take a screenshot using code on iOS?

Question

How to take a screenshot programmatically?

Answer 1

Have a look at this answer.It also takes care of retina display.

Actually to explain the process,

• Choose a image context size (probably the layer size for which you need screen shot)
• Render the layer which you want to take screenshot in the created context
• Obtain the image from the context and you are done!