IOS underlying layer – LLVM
This is the 29th day I participated in the August More text challenge. My column is August more text Challenge. The basic principles of iOS...
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Tag: objective-c
How classes load (part 2)
December 20, 2023
by Alexandra Owens
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This is the 15th day of my participation in the August Changwen Challenge. For details, see: August Changwen Challenge 1. Why ro, RW, rwe RO...
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NSThread for iOS Multithreading
December 20, 2023
by Lesley Hargreaves
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NSThread is officially provided by Apple. It is more object-oriented and easy to use than PThread. You can directly manipulate thread objects. However, it is...
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GCD for iOS Multithreading
December 20, 2023
by Mr. Gary Morris
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Grand Central Dispatch(GCD) is a relatively new solution to multicore programming developed by Apple. It is used to optimize applications to support multi-core processors and...
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Use @porperty in Objective-C
December 20, 2023
by Kay Waters
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Properties in Objective-C are defined by using @property. For example, properties capture the state of an object. They reflect the intrinsic attributes of an object...
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Class, superclass, metaclass, super_class, ISA, object, method, SEL, IMP
December 20, 2023
by Jessica Johnson
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Runtime, also called Runtime, is a set of low-level C language API, which is one of the core of iOS internal, we usually write OC...
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IOS development · Runtime Principles and Practices: Message Forwarding (Message mechanism, method not implemented +API incompatible crash, simulation of multiple inheritance)
December 20, 2023
by Aaryahi Keer
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Before we start using messaging mechanisms, we can agree on our terminology. For example, many people don't know what "method" and "message" are, but this...
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IOS development: Category and Extension
December 20, 2023
by Kanav Sen
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What is a Category? Category is a language feature that was added after Objective-C 2.0. The main purpose of a Category is to add methods...
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[iOS development]NSTimer and circular reference understanding
December 20, 2023
by Lori May
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NSTimer is a very important part of runloop, and we need to have a good understanding of this part and the circular reference part so...
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OC Underlying principles 21-KVO Custom
December 20, 2023
by Aarav Rana
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"This is the 8th day of my participation in the August Changwen Challenge. For details, see" August Changwen Challenge ". KVO custom ideas ISA points...
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How classes load (middle)
December 20, 2023
by Francisco Martin
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This is the 14th day I have participated in the August More text challenge. The details of this activity are as follows: Back to _read_
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Class Loading (part 1)
December 20, 2023
by Sandra Priest
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Objc_init initializes dyl by calling _dyLD_OBJc_notify_register. What does objc_init do
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NSOperation for iOS Multithreading
December 20, 2023
by Ben Dale
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Using NSOperation and NSOperationQueue together is also a multithreaded solution provided by Apple. NSOperation is based on a higher level of encapsulation of the GCD...
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IOS development ·KVO usage, principle and underlying implementation: Runtime simulation KVO listening mechanism (Blcok and Delgate mode)
December 20, 2023
by Steven Ferrell
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1. Theoretical Basis of KVO KVO is the implementation of the Observer Pattern in Objective-C. The observer object is notified when one of the properties...
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OC underlying principle 25-GCD analysis
December 20, 2023
by Julie Best
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1. Application of fence function 1. Concurrent fence function asynchronously run print result 2. 3. Global queue barrier function asynchronous run print results concurrent disorder...
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IOS low-level GCD – one in, one out scheduling group
December 20, 2023
by 黃婷婷
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In the previous chapter 'Exploring the underlying principles of iOS: Principles of GCD (Part 1)', we focused on the in-depth analysis of GCD functions and...
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GCD Source code Analysis (2)
December 20, 2023
by 楊佳慧
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In this chapter, we mainly analyze the underlying source implementation of synchronous and asynchronous functions. Before exploring, let's first understand the difference between synchronous and...
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OC underlying principles 20-KVO analysis
December 20, 2023
by Arnav Dube
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"This is the seventh day of my participation in the August Changwen Challenge. For details, see" August Changwen Challenge ". Foreword KVO some details explore...
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Algorithm related
December 20, 2023
by Edward Goddard
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An algorithm is a series of steps to solve a problem. Complexity is used to measure the efficiency of the algorithm. Time complexity is the...
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IOS Low-level learning – the use and principles of KVO
December 20, 2023
by Edward Goddard
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The API provided by KVO, the way to use it, and some skills and precautions in the process of using it. At the same time,...
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How do I monitor iOS crashes
December 20, 2023
by Caitlin Taylor DDS
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This is the 13th day I participated in The August More text Challenge. Check out the details of the activity: After the launch of the...
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IOS bottom – a fence letter blocked the number
December 20, 2023
by Onkar Sharma
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- The most direct function of the fence function is to control the order of execution of tasks, synchronization ** - the fence function can...
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NSTimer memory/circular reference issues integration
December 20, 2023
by Jose Aguilar
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The most commonly used timing method for daily development is NSTimer, and CADisplayLink and GCDTimer are still a bit cumbersome to write. But there's an...
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Cause analysis of iOS synchronization function deadlock
December 20, 2023
by Miss Chelsea Akhtar
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In the previous article, we introduced functions and queues. We also looked at calling stacks of functions; Today we are going to analyze how deadlocks...
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IOS bottom – be there or be square semaphore
December 20, 2023
by Lakshay Bala
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Semaphores are similar to 'binary semaphores' on page 26 of The Programmer's Self-improvement book. A Binary Semaphore is the simplest type of lock, which has...
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IOS bottom exploration of multithreading (six) – GCD source analysis (sync sync function, async asynchronous function)
December 20, 2023
by Bradley Norman
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In the last blog of GCD different queue of the underlying source exploration analysis, then this blog will GCD sync sync function, async asynchronous function...
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IOS bottom exploration of multithreading (5) – GCD different queue source analysis
December 19, 2023
by Iain Allen
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In the previous blog, I introduced the combination of queues and asynchronous and synchronous functions; With a clearer understanding of the queues and functions of...
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OC underlying principle 13 of classification loading
December 19, 2023
by Dean Wright
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In this chapter, the essence of content classification RWE develops the assignment classification loading process five kinds of situation analysis class and classification implementation load...
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Dyld loading process (part 2)
December 19, 2023
by Dr. Lawrence O'Brien
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_dyC_NOTIFy_register (&map_ima) : = = = = = = = = = = = = = = = = = =
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IOS Low-level – Dispatch Source
December 19, 2023
by 彭家豪
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The Dispatch Source is a wrapper around the BSD system kernel's customary kQueue, which is a technique for application programmers to perform processing when various...
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