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You can easily apply a fixed-width design to any system font. This ensures that every character (including spaces) occupies the same amount of horizontal space. Fixed Space Text ) .font(.system(.body, design: .monospaced)) // Applies the fixed-width design Use code with caution. Copied to clipboard 2. For General Users (Custom Font Installation)
According to Apple’s release notes (under “Fonts”), iOS 15.4 introduced:
How to install and use custom fonts on iPhone or iPad - iDownloadBlog ios 15.4 fixed space -font- download
import UIKit extension UIFont func toFixedSpaceNumbers() -> UIFont let numericFontDescriptor = self.fontDescriptor.addingAttributes([ UIFontDescriptor.AttributeName.featureSettings: [ [ UIFontDescriptor.FeatureKey.typeIdentifier: kNumberSpacingType, UIFontDescriptor.FeatureKey.selectorIdentifier: kMonospacedNumbersSelector ] ] ]) return UIFont(descriptor: numericFontDescriptor, size: 0) // Usage let customLabel = UILabel() customLabel.font = UIFont.systemFont(ofSize: 16).toFixedSpaceNumbers() Use code with caution. Summary Comparison: Fixed-Space Font Implementations Framework Method Primary Target Use Case Font.system().monospaced() System Fixed (SF Mono variant) General text styling in SwiftUI views .font(.system(.body, design: .monospaced)) SF Mono Family Terminal readouts, log parsing, and coding kMonospacedNumbersSelector Current Font (Proportional) Formatting financial ledger columns or timers Custom .ttf / .otf Bundling Third-Party (e.g., Space Mono) App branding and highly specific styling Installing Third-Party Fixed Width Fonts on iOS Devices
Apple introduced significant updates with iOS 15.4, but the release also brought an unexpected headache for developers and designers: a major rendering bug affecting fixed-space (monospace) fonts in WebKit and Safari. If your web applications, code editors, or text fields suddenly look broken on devices running iOS 15.4, you are dealing with a known system-level font mapping glitch. You can easily apply a fixed-width design to any system font
was a developer who lived in the "gutters" of his code—the precise, fixed-width alleys where every character had its place. For years, he had struggled to capture his sudden bursts of inspiration while on the move. His iPhone’s Notes app was a chaotic mess of proportional fonts that made his snippets of Python and Swift look like a jumbled alphabet soup.
In this deep-dive article, we will explain exactly what the “Fixed Space” bug was, how iOS 15.4 solved it, and—most importantly—how to download and install the necessary configuration profiles to finally enjoy monospaced fonts without crashing or spacing corruption. Copied to clipboard 2
Before iOS 15.4, many iPhone users experienced a frustrating problem. When they navigated to , the screen would spin indefinitely, refusing to display the actual storage breakdown. This issue affected a significant number of users across different iPhone models.
Even on iOS 15.4, you might encounter issues. Here is how to fix them:
iOS 15.4 didn't just add new fonts; it refined how iOS handles them. The key feature driving this search is the monospaced() API introduced for SwiftUI. This instance method "returns a fixed-width font from the same family as the base font".