Talk about how to contribute to open source software from Sdwebimage

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Talk about how to contribute to open source software from Sdwebimage

Acquaintance-Know me that my heart is worried, I do not know what I beg

Today, when chatting with others, I pulled this very famous open source library. Sdwebimage and I have known each other for 3 years and 11 months. Nearly four years of time, said short not short, said long not long.

As an IOS developer, the first library I contacted was Sdwebimage (the second is asihttprequest), and the longest study was sdwebimage.

Just after I learned the basics and started to do the project, I used the image cache library. The following code is the first knowledge I learned from Sdwebimage, and the most important one: how to design a method that accepts multiple optional parameters and allows callers to use them simply.

For the fledgling me, this code brings me in addition to the above knowledge, I also learned how to write extensions to existing classes, the first time to see block the power of ...

@Implementation Uiimageview (webcache)

- (void)setimagewithurl:(nsurl *)URL

{

[self setimagewithurl:url placeholderimage:nil];

}

- (void)setimagewithurl:(nsurl *)URL placeholderimage: (UIImage *)placeholder

{

[self setimagewithurl:url placeholderimage:placeholder options: 0];

}

- (void)setimagewithurl:(nsurl *)URL placeholderimage: (UIImage *)placeholder options:('sdwebimage'options) Options

{

'sdwebimage'Manager *Manager = ['sdwebimage'manager Sharedmanager ];

//Remove in Progress Downloader from queue

[manager cancelfordelegate:self];

self. Image = placeholder;

if (url)

{

[manager downloadwithurl:url delegate:self options:options];

}

}

#if ns_blocks_available

- (void)setimagewithurl:(nsurl *)URL success:(' Sdwebimage'successblock)success failure:('sdwebimage' Failureblock)failure;

{

[self setimagewithurl:url placeholderimage:nil success:success failure:failure];

}

- (void)setimagewithurl:(nsurl *)URL placeholderimage: (UIImage *)placeholder success:('sdwebimage'successblock) Success Failure:('sdwebimage'failureblock)failure;

{

[self setimagewithurl:url placeholderimage:placeholder options: 0 Success:success failure:failure];

}

- (void)setimagewithurl:(nsurl *)URL placeholderimage:( UIImage *)placeholder options:('sdwebimage'options)options Success:('sdwebimage'successblock)success failure:(' sdwebimage'failureblock)failure;

{

'sdwebimage'Manager *Manager = ['sdwebimage'manager Sharedmanager ];

//Remove in Progress Downloader from queue

[manager cancelfordelegate:self];

self. Image = placeholder;

if (url)

{

[manager downloadwithurl:url delegate:self options:options Success:success failure:failure];

}

}

#endif

In fact, through this project, you can also learn more, for example, how to determine the type of picture through NSData, how to manage multi-threaded queue ...

The joy of a new acquaintance--sadness, sorrow, parting

I don't know when I signed up for the GitHub account and watched the open source project.

After a watch operation on a particular item, any new conversation (merge submission, creation of a new issue, and someone replying to issue) will produce an unread notification.

As I became more aware of it, I discovered a series of shocking facts:

• This library is only updated by two developer maintainers

• The oldest non-closed issue from 2011

• Almost all versions have a bug of varying size (crash, getting the wrong picture, callback not executing ...). These facts struck me again and again, and as an open-source library with 15,824 Star, it was so fragile. So I became a volunteer and I worked hard to help the developer team solve the issue.

Kill – Eliminate bugs and be the dream of all programmers

Bugs are a nightmare for all programmers, and there are a lot of bugs that happen in certain situations and cannot be avoided by the development team alone. As a result of this project, can we make some contribution?

Most developers may find themselves unable to contribute to the code. So, can we act as testers for the project?

I will briefly list what some ordinary developers can do (mainly Sdwebimage + CocoaPods for example). I hope you will be able to contribute to open source software together.

SDWebImageThe current version number is3.8.2

• The short-Term Development branch of the project uses pod ' Sdwebimage ', ' ~> 3.8.2 ', and periodically performs pod update.

  You can quickly receive a bug fix release that can help verify that a bug has been resolved.

• The long-term Development branch of the project uses pod ' Sdwebimage ', ' ~> 3.8 ', and periodically performs pod update.

  Can quickly receive a small feature update version, you may need to modify the project code, there is a small probability of a bug.

• Use pod ' sdwebimage ', ' ~> 3 ' in new projects, and perform pod update on a regular basis. When there is a major version of the update, there is a great probability that you need to modify the project code, there is a large probability of a bug.

• Revise Podfile periodically based on version update

• When you find a bug, create a issue in time. Click here to create

  Https://github.com/rs/%60SDWebImage%60/issues/new

Postscript

The Sdwebimage 4.0 version is already on the road, and this version provides finer-grained control of load requests, compatible with Swift 3, using the latest OC syntax ...

Talk about how to contribute to open source software from Sdwebimage