From http://www.yifeiyang.net/development-of-the-iphone-simply-1/
At the beginning of the new year, Vientiane was updated. From the beginning of the new year, let's take a closer look at the iPhone development. First, let's take a look at arc. What is arc?
ARC is a new feature launched by iOS 5, which is called Automation Reference counting ). Simply put, it i
Teach you arc, which introduces some of the features of Arc, and the method of converting non-ARC engineering into ARC EngineeringOfficial ARC Apple DocumentLet me introduce the arc in my own words and write down the questions and
First, IntroductionARC is a new feature that has been added since iOS 5, completely eliminating the cumbersome manual management of memory, and the compiler will automatically insert the appropriate retain, release, and autorelease statements where appropriate. You no longer need to worry about memory management, because the compiler handles everything for youNote: ARC is a compiler attribute, not an IOS runtime feature (except for the weak pointer sy
Tip: The "instance variable" in this article is "member variable" and "local variable" isFirst, IntroductionARC is a new feature that has been added since iOS 5, completely eliminating the cumbersome manual management of memory, and the compiler will automatically insert the appropriate retain, release, and autorelease statements where appropriate. You no longer need to worry about memory management, because the compiler handles everything for youNote: ARC
1.ARC When you call the release or retain statement yourself, ARC compiles the file when it is valid, and you can support both arc and non-arc code in the mashup through the-fno-objc-arc and-FOBJC-ARC two compiler flags
a is assigned to B. If a no longer uses this memory, it only needs to subtract the reference count by 1, indicating that it no longer owns the memory. b The reference count is also reduced by 1 when the memory is no longer used. When the reference count becomes 0, the memory is no longer referenced by any pointers, and the system can release it directly.Summary: The above two is actually the difference between assign and retain, assign is the direct assignment, which may cause 1 of the problem,
How to enable ARC in the cocos2d ProjectThe basic idea is not to support the separation of the ARC Code and the support of the ARC. You can set the compilation options in xcode to make the code that supports and does not support the ARC coexist.
Cocos2d is the most popular 2d game engine in ios app development. However
Automatic Reference Counting (ARC) is a compile-time technology that simplifies the memory management of OBJECTIVE-C programming with this technique.Here I translate this technique into automatic memory counter management technology, which is the difference between OBJECTIVE-C code that uses and does not use this technique.Arc technology is released with XCode4.2, and in the default project template, you can specify whether your project supports
Ios arc mechanism and iosarc Mechanism
IOS ARC memory automatic management mechanism, currently, almost a lot of projects will use ARC, because it releases the memory to work, but although ARC is good, we still cannot leave memory management alone.How ARC works:
In the 2011 WWDC, Apple mentioned that 90% of the crash were caused by memory management, and ARC ( Automatic Reference Counting ) was the solution given by Apple. With ARC enabled, developers do not need to worry about memory management, and the compiler will handle it for you (note that arc is a compiler feature, not an iOS runtime feature, not a garbage collec
Hint: the "instance variable" in this article is "member variable", and "local variable" is "local variable"
0. Introductionarc is a new feature that has been added since iOS 5, eliminating the cumbersome manual management of memory, and the compiler automatically inserts the appropriate retain, release, and autorelease statements where appropriate. You no longer need to worry about memory management, because the compiler handles everything for youNote: ARC
This tutorial mainly uses Photoshop to design a vintage-style personalized watermark icon, which is not difficult to draw. It is mainly done by adding materials. if you like it, let's take a look at it. this tutorial mainly uses Photoshop to design a personalized watermark icon in a retro style, which makes it difficult to draw. It is mainly done through overlay of materials. if you like it, let's learn it together.
This tutorial mainly usesPhotosh
There are a variety of wireless Internet access methods. We often see wireless network interfaces and wireless network interfaces for wireless Internet access. For today's wireless trends, the wireless access of infrared seems a little retro. It cannot be said that it has been out of the stage, at least in terms of choice, it has gradually been forgotten by everyone. Next we will introduce a wireless Internet access solution through infrared rays. Thi
to adjust the size of the layer, used to match the current picture size, with the "overlay" layer blending mode to the texture material layer into the current drawings, with hue/saturation adjustment layer, Coloring the whole picture. Here, I have chosen a more retro brown color.3, the new layer, from the main body of black woman began to portray, strengthen her face features, the background of the "Alpaca Ninja" also appropriately give point shape c
The cases in this article are provided by the author of Mr. Perivascular, the case of this article is only for reference, for everyone to learn! The model in this case is Chen Sixuan. Painting Wind: She is in the center of the picture, the whole composition looks stable and balanced, highlighting the character's capable personality. Makeup face emphasis on lip, hairstyle for simple hair, classic black and white fashion women's suits.
The model in this case is Chen Sixuan. Painting Wind: She is
PS combined with AI to convert portrait to retro half hand-painted effect
Original
1, open the material picture, and then select the "Pencil" tool sketch next as a reference area, I started from the eye, in the depiction of the eye when the use of "elliptical tool."
2, continue to use pencil tool sketch, when you need to paint more details of the section, using the "pen tool", however, it does not need to be too perfect.
This tutorial mainly uses Photoshop to make the retro flower style WordArt tutorial, the overall effect of the tutorial is very beautiful, the main use of material to complete, like friends let us learn together.
The following is a tutorial
Hello everyone, here is also, this color inspiration from the original image in the PS software thumbnail, looks like a retro feeling, and then made this color palette, personal feeling is good. I did not have the system to learn, so do not know much about color palette, look more advice.
Effect June
The following is the original artwork
Tutorial start: First step: Open the picture, I don't need to tell you.
The
, we'll adjust the color balance of the picture. The specific way is: The blue to the lowest, and then increase the red, in order to achieve their favorite yellow tone effect.
The second is to adjust the transparency of the layer. Here we can restore some of the original colors according to our personal preferences. By this step, the effect of the adjustment even if the basic completion.
Finally, we can also according to their own sense of difference, adjust the curve,
This tutorial teaches Fei's PS learners to use PS to make retro stamp effect, the difficulty of the tutorial is general, the stamp produced is very beautiful. Suitable for beginners to learn.
1. First open Photoshop, drag in a picture:
2.CTRL+ALT+C, change the canvas size, tick "relative", width and height are 100, add 50px of white to all four edges of the picture:
3.CTRL+J, copy a layer, put the following layer
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