SwiftUI: How to build text with subScript and super Script?

Xcode 12 — iOS14

In this tutorial, We will be implementing logic to make text with Subscripts and Superscripts.

To implement subscript/superscripts first we need to define a logic to understand what part of text will be carried as sub/super scripts.

1. Any text in ^{} will be treated as superscript.
e.g. =>  X^{2} -> X²
2.  Any text in _{} will be treated as subscript.
e.g. => H_{2} => H₂

We are going to use following Text property:

var text = Text("pre") + Text("post")
//Also
text = text + Text("more text")
Text("X").font(.callout) + Text(2).font(.caption).baselineOffset(6.0)
Output => X²

Logic to implement:

1. Iterate throw String for find first ^ or _ 
2. split string add first part as it is.
3. Check if this string followed by {<data>}
4. if yes set the baseline for <data> and ignore ^_{}
5. redo the step 1-4 for second part of string after reducing ^_{<data>}