I would like to do 2 things in the xCode:

  1. enabling spelling correction in the comments.
  2. unrolling the lines of code/comment, I mean like when I have a long line of code xCode won't break it to 3-4 lines and it all be in one long line.

For the first one Press,

A quick way :

cmd + shift + :

A permanent way

Click on Edit>Format>Spelling and Grammar>and then select "Check spelling while typing"

For the second question,

Goto Xcode>Preferences>Text Editing>Indentetion and then select "Wrap lines to editor width".

As shown in this picture,

enter image description here

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