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Tag: objective-c

ios

IOS Fundamentals — objc_msgSend for RunTime

December 31, 2023
by Matthew Harrison
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While exploring cache_t, the underlying iOS principle of cache exploration in objc_class, we found that objects actually call the objc_msgSend method before insert, if you've...
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ios

Iosruntime Dynamically adds attributes

December 31, 2023
by 呂怡安
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We often use Category categories in development to extend functionality to existing classes. Although inheritance can also add new methods to existing classes and has...
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ios

Objective – C Runtime class

December 31, 2023
by Mrs. Marie Gardner
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You can see that objc_class has three members. First, objc_class inherits from Objc_Object, which means that the class is also an object. Isa, a member...
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ios

Objective-c memory management: Blocks

December 31, 2023
by Tiffany Blake
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The following environments are all in ARC, set up in general, and tested using XCode10. A Block closure in Objective-C, an extension of C, is...
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ios

[iOS features] -info.plist permission

December 31, 2023
by Brett O'Connor
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` ` ` / / album NSPhotoLibraryUsageDescription whether to allow the App to access your photo album ` ` ` ` ` ` NSCameraUsageDescription whether...
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ios

Struct byte alignment

December 30, 2023
by Laura Lowery
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The first address of a structure variable is divisible by the size of its widest base type member. 3) Fill the unused space according to...
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ios

Objective-c (12) Associative objects

December 30, 2023
by John Gibb
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This article, the 12th in the Objective-C series, covers the underlying structure and use of associative objects. Can I add member variables to a Category?...
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ios

IOS Multithreading GCD

December 30, 2023
by Ryan Chaudhary
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Queue: A queue is a waiting queue for tasks to be executed. A queue is a special kind of linear table, using FIFIO(first in, first...
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ios

Memory management (MEMORY partition)

December 30, 2023
by Tina Howard
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Let's talk about iOS memory. We know that iOS memory mainly has the following five areas, namely stack area, heap area, global area, constant area,...
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ios

UIButton expands the click area

December 30, 2023
by Dr. Roy Pratt
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- (UIView) hitTest:(CGPoint) point withEvent:(UIEvent) event with the newly set Rect to click on the range. When Swizzling is executed in +load, do not call...
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ios

AsyncDisplayKit/Texture

December 30, 2023
by Phillip Carter
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Nodes can be drawn asynchronously and are thread-safe, and you can instantiate and configure their hierarchy in asynchronous threads. To keep the user interface smooth,...
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ios

Objective-c (5) System framework

December 30, 2023
by 唐惠雯
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This is the fifth in the Objective-C series. NSCache can be capped to limit the total number of objects in the cache and the "total...
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ios

How is series – KVO&KVC realized

December 30, 2023
by Sienna Hart
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Introduction: through the first introduction to the series we can know that the isa pointer to the instance object is pointing to the corresponding class...
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ios

SDWebImage explore

December 30, 2023
by Renee Hayre
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SDWebImage is an excellent image caching framework in ios, which has experienced several versions. Although the performance is not the highest, it is very suitable...
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ios

The associated object in the Category

December 30, 2023
by Robert Cole
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You can see from its data structure that it can add methods, attributes, implementation protocols, etc., but there is no memory structure for member variables....
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