Tag: objective-c

ios

OC Basic Principle -11: objc_msgSend Quick lookup of process analysis

January 1, 2024

by 楊冠霖

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Either [Person sayHello] or objc_msgSendSuper executes the sayHello implementation of the parent class, so we can make a guess: method calls first look in the...

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ios

15 pit trips on iOS

January 1, 2024

by Angela Shepherd

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Preface In line with apple dad system update consistent style (UI will be messy), I began iOS15 exploration; NavigationB based on Xcode Version 13.0 Beta...

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ios

IOS development – Bitcode

January 1, 2024

by Lucas Shepherd

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The Bitcode mode indicates that when a developer submits an App to the App Store, Xcode will compile the application into an intermediate representation **...

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ios

OC Basic Principles 11- Message forwarding

January 1, 2024

by Kevin Arroyo

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Dynamic method resolution is explored in IOS underlying principles. After the dynamic resolution through log auxiliary function to realize forwardingTargetForSelector and methodSignatureForSelecto

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ios

Simple use of iOS FTPManager and FAQs

January 1, 2024

by Ishaan Vyas

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In simple terms, the name of the file we need to upload already exists in the corresponding path of the server, just change the name...

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ios

OC Underlying Principle -10: ObjC_class – Middle -cache- Principle analysis

January 1, 2024

by Grace Trask

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If a method is not called, the cache is not cached. If a method is called, the cache is cached once.

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ios

Reconstruction scheme for special effects camera

January 1, 2024

by Cody Todd

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Existing problems: 1. Using GPUImage third-party framework to render images, the bottom layer is realized based on OpenGL 2. Chain rendering method, multiple images or...

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ios

Custom Clang plugin for iOS fundamentals

January 1, 2024

by Eileen Edwards

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Introduction This article mainly introduces LLVM and Clang related concepts, design ideas and compilation process. This article will use LLVM and Clang to implement a...

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ios

IOS Advanced Series – Basics of Project Development (part 2) Mach-O and linker, Symbol

January 1, 2024

by Nitara Biswas

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On the far left is the address, we see that main starts at 100003F20 and ends at 100003F5E. The previous article showed that Mach-O is...

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ios

OC Basic principle -objc_msgSend method lookup (middle)

January 1, 2024

by Sumer Bandi

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Our last article looked at objc_msgSend looking up (the portal) in the cache. At the end of the article, we learned that when messages are...

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ios

Memory management analysis (5) — weak pointer implementation principle

January 1, 2024

by Donna Holmes

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As I mentioned in isa in Depth, Apple has optimized ISA starting with the ARM64 architecture to store more information in isa Pointers through bit-field...

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ios

MJExtension principle in-depth analysis

December 31, 2023

by 胡惠雯

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MJExtension is a very easy to use and powerful third-party Model and JSON mutual conversion commercial third-party library, help developers save time from JSON or...

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ios

Advanced methods for testing UIKit using Swift

December 31, 2023

by Tushar Chopra

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At Superhuman, We're building the fastest email experience in the world. This post describes several techniques to debug closed source Libr...

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ios

OC Memory Management

December 31, 2023

by Alexandra Owens

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Each time runloop completes a loop, it checks the retainCount of the object. If returnCount is 0, no reference to the object is available and...

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ios

IOS development: Xcode 9.0 issues with moving files and packaging the Framework

December 31, 2023

by 胡惠雯

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Today, I wanted to test some third-party libraries. I planned to make a Demo, but I found that it couldn't work and kept hanging for...

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ios

Basic study of iOS Class source code

December 31, 2023

by Nathan Francis

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I always have a vague understanding of the nature of ios OC/Swift classes. I seem to know but not very clear. I spent some time...

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ios

OC Underlying principle -15: The association between DYLD and OBJC

December 31, 2023

by Kenneth Bruce

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DYLD_PRINT_STATISTICS: If DYLD_PRINT_STATISTICS is set to YES, the console will print the loading time of the App, including the total loading time and the dynamic...

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ios

OC -objc_msgSend

December 31, 2023

by Peter Gledhill

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In the previous article, we stated that dynamic method resolution is performed when no method is found in cache_t, giving another chance to call the:...

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ios

Review objective-C Runtime – Smalltalk integration with C

December 31, 2023

by Sumer Kuruvilla

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Smalltalk merging with C and instantiating an object with a factory method: at the time, an object-oriented C language was really attractive, but the message...

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ios

Objective-c (2) Object, message, runtime

December 31, 2023

by Jivika Grewal

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This is the second in the Objective-C series. In Java or C++, we can define the scope of an instance variable. Writing Objective-C, however, rarely...

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ios

ObjectiveC object structure

December 31, 2023

by Elliot Chadwick-Jones

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This article will analyze the data structure of Objective-C objects from a source point of view. Basic understanding of objective-C is required to read this...

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ios

IOS RunLoop,

December 31, 2023

by Vanessa Copeland

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RunLoop literally means running in a circle, which is a bit superficial to understand. Here's a paragraph from apple's official documentation about RunLoop. To put...

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ios

Objective-c Block low-level implementation

December 31, 2023

by 張婷婷

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Blocks are anonymous functions with automatic (local) variables. It is an extension of the C language (which does not allow such anonymous functions). Is an...

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ios

OC- Underlying Principles -20: KVC- Underlying principles

December 31, 2023

by Emma Booth

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Key-value Coding is a mechanism enabled by the NSKeyValueCoding informal protocol that objects use to access their properties indirectly. A property can be accessed through...

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ios

Memory management analysis (a) – MANUAL memory management in the MRC era

December 31, 2023

by Rebecca O'Brien

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Manual memory management in the MRC era iOS uses reference counting to manage the memory of OC objects. The default reference count of a newly...

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ios

OC -KVO (key value observation) – on

December 31, 2023

by Armaan Brahmbhatt

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KVO: the full name is key-value observing, which is what we are familiar with. KVO is a monitoring mechanism, which informs the observer of the...

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ios

The truth about self and Super

December 31, 2023

by Ishita Batta

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The only difference between objc_msgSend(id, SEL) and objc_msgSendSuper(__rw_objc_super *superclass, SEL) is the starting point of the lookup method. The former is the current class Son,...

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ios

AsyncDisplayKit/Texture

December 31, 2023

by Ross Brown-Anderson

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Those familiar with Flexbox will notice that there are many similarities between the two systems, but the Layout API does not reimplement all CSS. The...

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ios

Ios-block writing and use

December 31, 2023

by Kashvi Sane

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Ios-block variable intercept 1. Block definition Of this code to the left of the equals sign declare a code Block named sumOfNumbers, preceded by the...

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ios

What does @property do with strong and weak

December 31, 2023

by Arhaan Chowdhury

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View the assembly code, analyze the strong and weak attributes, generated in the set assignment method specific implementation, why the strong modifier will increase the...

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