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Fatbobman's Blog

Fatbobman's Blog is a platform offering a wide range of tutorials, articles, and insights focused on Swift, SwiftUI, and iOS development. The content is designed to help developers at various skill levels improve their knowledge and stay updated with the latest industry trends.

Details

URL: 🔗 https://fatbobman.com/en/

Authors: Fatbobman

Complexity Levels:

  • Beginner: 25%
  • Intermediate: 45%
  • Advanced: 30%

Frequency of Posting: Weekly

Types of Content:

  • Tutorials: 50% (Step-by-step guides and practical examples)
  • Articles: 40% (In-depth articles and best practices)
  • News: 10% (Updates on Swift and iOS development)

Additional Features:

  • Newsletter: Available for regular updates and news.
  • Collections: Curated collections of articles on specific topics.
  • Discord Community: A place for discussion and support.
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SwiftUI​

🔵 GeometryReader: Blessing or Curse?​

GeometryReader has been a staple in SwiftUI since its inception, but it has also been the subject of significant debate. While some developers criticize it for disrupting layouts or causing performance issues, others find it invaluable for certain use cases. This article delves into the common criticisms of GeometryReader and provides a balanced view, examining whether the problems lie with the tool itself or with developers' expectations.

Details

URL: 🔗 https://fatbobman.com/en/posts/geometryreader-blessing-or-curse/

Published: Nov 9, 2023
Updated: Jun 18, 2024
Authors: Fatbobman

Tags:
SwiftUI, GeometryReader, iOS Development, Layout, Performance

Key Points​

  • Criticism of GeometryReader: Common issues include layout disruption, incorrect geometry information, rigidity in view layouts, and performance concerns.
  • Understanding GeometryReader: It is primarily a tool for reading geometry information, not necessarily for defining layouts, which is often misunderstood.
  • Layout Logic and Use Cases: GeometryReader occupies all available space and aligns child views at the origin, making it suitable for certain tasks but not as a general-purpose layout container.
  • Performance Considerations: Proper use of GeometryReader, especially with new SwiftUI APIs, can mitigate performance issues that arise from incorrect or excessive use.
  • Alternatives: SwiftUI now offers more refined tools for layout, reducing the need to rely heavily on GeometryReader.

Summary of Contents​

  • Introduction to GeometryReader: Overview of its role in SwiftUI and the reasons behind its divisive reputation.
  • Common Criticisms: Detailed examination of the most frequent complaints about GeometryReader, including its impact on layout and performance.
  • What GeometryReader Really Does: Clarification of its purpose as a geometry information reader, not a layout tool.
  • Is GeometryReader a Layout Container? Exploration of how GeometryReader handles layout and when it should be used as a container.
  • Correct Usage Patterns: Examples and tips for using GeometryReader effectively without falling into common traps.
  • Performance Issues and Solutions: Discussion of how to avoid performance pitfalls when using GeometryReader, especially in complex layouts.
  • Alternatives to GeometryReader: Overview of other SwiftUI tools that can achieve similar goals more efficiently.

Additional Resources​

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🔴 Layout in SwiftUI Way​

This article by Fatbobman demonstrates the power and flexibility of SwiftUI's layout system by showcasing multiple ways to achieve the same layout. It helps developers gain a better understanding of SwiftUI's layout logic through various approaches, making it a valuable read for those working with complex UI designs in SwiftUI.

Details

URL: 🔗 https://fatbobman.com/en/posts/layout-in-swiftui-way/

Published: March 1, 2023

Authors: Fatbobman

Tags:
SwiftUI, iOS, Layout, UI Development

Key Points​

  • Demonstrates multiple layout solutions for the same UI requirement, highlighting SwiftUI's flexibility.
  • Explains the use of techniques such as offset, alignmentGuide, NameSpace, ScrollView, and custom Layout protocols.
  • Provides in-depth code examples for each approach, making it easier for developers to apply these techniques in their projects.

Summary of Contents​

  • Introduction: The article begins by addressing common concerns about SwiftUI's capabilities in handling complex layouts and sets the stage for the solutions provided.
  • Various Approaches: The main content is structured around different layout techniques, including offset, alignmentGuide, NameSpace, ScrollView, and layout priority management, each with detailed explanations and code snippets.
  • Custom Layout Protocol: A deeper dive into creating custom layouts using SwiftUI's Layout protocol, offering a more advanced solution for specific scenarios.
  • Conclusion: Emphasizes that the upper limit of layout ability depends on the developer's understanding of the tools SwiftUI provides.

Additional Resources​

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🔵 How to Tile Images in SwiftUI​

This article, authored by Fatbobman and published on July 31, 2024, explores various methods to achieve image tiling in SwiftUI, moving beyond the commonly known resizable modifier. The post introduces more advanced techniques, such as using the foregroundStyle modifier with ImagePaint, and discusses a custom approach for tiling SF Symbols across different iOS versions. The insights provided are valuable for developers looking to enhance their SwiftUI capabilities, especially in scenarios requiring precise image control and flexibility.

Details

URL: 🔗 https://fatbobman.com/en/posts/how-to-tile-images-in-swiftui/

Published: July 31, 2024

Authors: Fatbobman

Tags:
SwiftUI, iOS Development, Image Tiling

Key Points​

  • resizable Modifier: Commonly used for tiling images, but has limitations such as difficulty adjusting image size and only working with Image types.
  • foregroundStyle Modifier with ImagePaint: A more flexible and SwiftUI-styled approach that offers greater control over the tiling process.
  • Custom Image Creation: Techniques for creating custom images to tile SF Symbols across different iOS versions, ensuring compatibility and retaining symbol control features.

Summary of Contents​

  • Resizable Modifier: Describes the usage of resizable with resizingMode: .tile, highlighting its advantages and limitations.
  • ForegroundStyle with ImagePaint: Explains how to use foregroundStyle and ImagePaint for more controllable and intuitive image tiling in SwiftUI.
  • Custom Image for SF Symbols: Discusses creating custom images for SF Symbols to achieve tiling while maintaining full control over symbol attributes across different iOS versions.

Additional Resources​

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🔵 Understanding SwiftUI View Update Mechanism​

This article explores how SwiftUI's declarative and reactive approach enables automatic view updates, focusing on an intriguing TimelineView issue. It delves into key concepts like view types, declarations, and instances to explain why some views update as expected while others remain static. This understanding is critical for writing performant SwiftUI applications.

Details

URL: 🔗 Understanding SwiftUI View Update Mechanism

Published: 2024-11-13

Authors: FatBobMan

Tags:
SwiftUI, view updates, TimelineView, reactive programming, iOS development

Key Points​

  • Reactive Framework: SwiftUI updates views reactively based on state and events.
  • View Declaration and Updates: Changes in state or specific conditions trigger view re-evaluation.
  • View Instance Value Comparison: SwiftUI optimizes updates by comparing current and previous instance values.
  • Common Pitfall: Encapsulated views (e.g., RightEmoji) may not update if their instance value remains static.

Summary of Contents​

  • The Problem: A TimelineView exhibits inconsistent emoji updates due to how SwiftUI determines when to re-evaluate views.
  • Core Concepts: Explains view types, declarations, and instance values and their role in updates.
  • Analyzing SwiftUI's Response Mechanism: Describes how events like state changes trigger view updates.
  • Conditions for Re-Evaluation: Outlines when and why SwiftUI re-evaluates view declarations.
  • The Solution: Shows how introducing randomness changes the instance value, forcing updates.
  • Performance Tips: Advice for optimizing view declarations and minimizing unnecessary computations.

Additional Resources​

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