About Ruler
Ruler is a lightweight and flexible iOS framework that allows developers to easily measure and align UI elements in their applications. With Ruler, you can quickly create pixel-perfect designs and ensure consistency across different screen sizes.
Key Features
- Simple and intuitive API
- Supports both horizontal and vertical measurements
- Ability to specify distance based on the size of other elements
- Automatic conversion between points and pixels
- Customizable appearance and behavior
Installation
- Open your Xcode project
- Go to “File” → “Swift Packages” → “Add Package Dependency”
- Enter the repository URL:
https://github.com/myrepository/ruler.git
- Choose the version you want to install
- Click “Next” and wait for Xcode to resolve the package
- Once resolved, select the “Ruler” package and add it to your target
- Finally, click “Finish” to complete the installation
Getting Started
To start using Ruler in your project, follow these simple steps:
- Import the Ruler framework into your source file:
- Create an instance of Ruler:
- Measure and align your UI elements:
- Customize Ruler’s appearance and behavior:
import Ruler
let ruler = Ruler()
// Measure a label with a fixed width
let width = ruler.measure(100)
// Align a button to the center of a view
button.center.x = ruler.align(view.centerX)
// Change the color of the measurement guide
ruler.measurementColor = .red
// Enable snapping to grid
ruler.enableSnapping = true
Usage Examples
Here are some common use cases for Ruler:
Aligning UI Elements
Ruler makes it easy to align UI elements to achieve a cohesive design. For example:
// Align two labels vertically
label2.topAnchor.constraint(equalTo: ruler.align(label1.bottomAnchor)).isActive = true
// Align a button to the leading edge of a view
button.leadingAnchor.constraint(equalTo: ruler.align(view.leadingAnchor)).isActive = true
Sizing UI Elements
Ruler provides a simple way to set the size of UI elements:
// Set the width of a view
view.widthAnchor.constraint(equalToConstant: ruler.measure(200)).isActive = true
// Set the height of a button relative to another view
button.heightAnchor.constraint(equalTo: ruler.measure(view2.heightAnchor)).isActive = true
Creating Spacing
Ruler enables you to establish consistent spacing between UI elements:
// Create a vertical spacing of 20 points
label1.bottomAnchor.constraint(equalTo: ruler.align(label2.topAnchor, offset: 20)).isActive = true
// Establish a horizontal spacing of half the width of another view
view.leadingAnchor.constraint(equalTo: ruler.align(view2.trailingAnchor, multiplier: 0.5)).isActive = true
Conclusion
Ruler provides developers with the tools they need to easily measure and align UI elements in their iOS applications. By using Ruler, you can achieve pixel-perfect designs and ensure consistency across devices. Start using Ruler today and streamline your UI development process!