Add iOS content (#5828)

* update iOS content, correct tcp/ip title

* add swift interoperability content

src/data/roadmaps/api-design/content/understand-tcp--ip@KG3wO86F8Of27fU7QRcsn.md

@@ -1,3 +1,3 @@
-# Understand TCP / IP under Learn the Basics
+# Understand TCP / IP
 
 When designing APIs, an essential building block is the understanding of TCP/IP. TCP/IP, standing for Transmission Control Protocol/Internet Protocol, is the suite of communications protocols used to connect hosts on the Internet. It provides ordered, error-checked delivery of streams of bytes from a program on one computer to another program on another computer. If you want to understand how APIs communicate over networks, knowing the fundamental working of TCP/IP is indispensable. Fully appreciating this topic will strengthen your grasp on API design and help you make more informed decisions when creating APIs.

src/data/roadmaps/ios/content/benefits-over-objective-c@ZkNulHQAqhiFTO3CRC_mW.md

@@ -1 +1,17 @@
-# Benefits over Objective-C
+# Benefits over Objective-C
+
+**Safety and Reliability:** Swift includes features like optionals and type inference that reduce common programming errors and crashes.
+
+**Modern Syntax:** Swift’s concise and clean syntax improves readability and maintainability.
+
+**Performance:** Swift is designed for speed and efficiency, often outperforming Objective-C in benchmarks.
+
+**Interoperability:** Swift can easily coexist with Objective-C, allowing for a gradual transition of codebases.
+
+**Memory Management:** Automatic Reference Counting (ARC) in Swift handles memory management across both procedural and object-oriented code, reducing memory leaks.
+
+**Playgrounds:** Swift's interactive playgrounds provide a dynamic environment for testing and learning Swift code.
+
+Visit the following resources to learn more:
+
+- [@article@Swift vs Objective-C](https://www.waldo.com/blog/swift-vs-objective-c)

src/data/roadmaps/ios/content/history-and-why-swift@z4-1Gc95JKYAn2RPFc7hw.md

@@ -1 +1,18 @@
-# History and Why Swift?
+# History and Why Swift?
+
+**History**
+
+Swift was introduced by Apple in 2014 as a modern replacement for Objective-C. 
+
+It was developed to address the limitations and complexities of Objective-C, providing a more powerful and user-friendly programming language.
+
+**Why Swift?**
+
+Swift offers improved performance, safety, and readability. It reduces common programming errors with features like optionals and type inference. 
+
+Swift’s concise syntax and modern language constructs enhance developer productivity, making it easier to write and maintain code. Its open-source nature also allows a wider community to contribute and improve the language.
+
+
+Visit the following resources to learn more:
+
+- [@video@A Brief History](https://www.youtube.com/watch?v=4P_ZsOqELBo)

src/data/roadmaps/ios/content/interoperability-with-swift@IAPzuN51xvrZJ5TFB23Q9.md

@@ -1 +1,17 @@
-# Interoperability with Swift
+# Interoperability with Swift
+
+Swift is designed to work seamlessly with Objective-C, allowing developers to integrate and use both languages within the same project. This interoperability enables:
+
+**Gradual Migration:** Developers can incrementally migrate their codebase from Objective-C to Swift without needing a complete rewrite.
+
+**Mixed-Language Projects:** Swift and Objective-C files can coexist, and developers can call Objective-C code from Swift and vice versa.
+
+**Access to Existing Libraries:** Swift code can leverage existing Objective-C libraries and frameworks, ensuring continued use of valuable resources and tools.
+
+**Bridging Header:** A bridging header file allows Swift to interface with Objective-C code, facilitating communication between the two languages.
+
+**Compatibility:** Swift supports dynamic libraries, ensuring compatibility with existing Objective-C runtime and APIs.
+
+Visit the following resources to learn more:
+
+- [@video@Bridging Swift And Objective C](https://www.youtube.com/watch?v=Wp_-8tE85hE)

src/data/roadmaps/ios/content/objective-c@oOaMz9A5DZvrjxovMztXz.md

@@ -1 +1,11 @@
-# Objective-C
+# Objective-C
+
+Objective-C is a general-purpose, object-oriented programming language that adds Smalltalk-style messaging to the C programming language.
+
+It was the primary language used by Apple for macOS and iOS development before the introduction of Swift. 
+
+Objective-C enables the creation of dynamic and flexible applications by allowing objects to send messages to each other. It is known for its runtime capabilities and is often used in conjunction with Apple's Cocoa and Cocoa Touch frameworks.
+
+Visit the following resources to learn more:
+
+- [@official@Programming with Objective-C](https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html#//apple_ref/doc/uid/TP40011210)

src/data/roadmaps/ios/content/swift-recommended@KJ7fM-V0_azY_lzmhjJAN.md

@@ -1 +1,10 @@
-# Swift (Recommended)
+# Swift (Recommended)
+
+Swift is a powerful and intuitive programming language developed by Apple for building iOS, macOS, watchOS, and tvOS applications. It combines modern language features like type safety, concise syntax, and performance optimizations, making it easy to write and maintain. 
+
+Swift is designed to be safe, fast, and interactive, offering a more productive coding experience compared to Objective-C.
+
+Visit the following resources to learn more:
+
+- [@official@Swift Documentation](https://www.swift.org/documentation/)
+- [@video@Swift in 100 Seconds](https://www.youtube.com/watch?v=nAchMctX4YA)