Vaida12345 / Swift-LaTeX

Display LaTeX using SwiftUI & LaTeX DSL

Swift LaTeX

Display LaTeX using MathJax. The package also provides a custom LaTeX DSL, which enables you write LaTeX the way you write SwiftUI Views.

LaTeX with SwiftUI

A View called LaTeXView is avaiable to display formulas in LaTeX.

import LaTeX
import SwiftUI

struct ContentView: View {
    
    var body: some View {
        LaTeXView(formula: "\\pi")
    }
    
}

---

As a javascript package was used to render LaTeX, the Outgoing network Connections needs to be enabled in Project Sandbox.

LaTeX DSL

This part was designed with the goal of writing LaTeX the way you write SwiftUI.

$$ \sum_{x = 1}^{10} {{{\color{3a81f6} x}}^2} $$

let formula = LaTeXBuilder.build {
    Sum("x", from: 1, to: 10) { x in
        x
            .colored(.blue)
            .squared()
    }
}

Note that the Components are translated to LaTeX only when .latexExpression is called.

print(formula)
// RangedLargeOperator<...>(...)

print(formula.latexExpression)
// \sum_{x = 1}^{10} {{{\color{3a81f6} x}}^2}

print(formula.evaluated())
// numeric(385.0)

$$ {{\nabla\times{\overrightarrow{\mathbf{B}}}}-{{\color{3a81f6} \frac{1}{C}}} \frac{\delta \overrightarrow{\mathbf{E}}}{\delta t}}={4 \pi \rho} $$

Equals {
    Subtraction {
        Multiplication {
            nabla
        } by: {
            "B".font(.mathbf).overRightArrowed()
        }
    } by: {
        Fraction(1, "C")
            .colored(.blue)
    }
    
    Fraction {
        delta
        "E".font(.mathbf).overRightArrowed()
    } denominator: {
        delta
        "t"
    }
} with: {
    4
    pi
    rho
}

$$ \int_{-N}^N {e^x \, \mathrm{d}x} $$

Integral("x", from: "-N", to: "N") { variable in
    Power {
        "e"
    } with: {
        variable
    }
}

$$ {R_\theta}={\begin{bmatrix}\cos\theta & -\sin\theta \\ \sin\theta & \cos\theta\end{bmatrix}} $$

Equals {
    Subscript {
        "R"
    } with: {
        theta
    }
} with: {
    LaTeXMatrix {
        [
            [cos(theta), -sin(theta)],
            [sin(theta),  cos(theta)]
        ]
    }
}

Using Swift LaTeX

If you are working on a Swift Package, use

// inside Package.swift
dependencies: [
    .package(url: "https://github.com/Vaida12345/Swift-LaTeX.git")
],

Otherwise, use the project link to find this package in Xcode.

Credits

• MathJax.