SDWebImage ========== [![Build Status](http://img.shields.io/travis/rs/SDWebImage/master.svg?style=flat)](https://travis-ci.org/rs/SDWebImage) [![Pod Version](http://img.shields.io/cocoapods/v/SDWebImage.svg?style=flat)](http://cocoadocs.org/docsets/SDWebImage/) [![Pod Platform](http://img.shields.io/cocoapods/p/SDWebImage.svg?style=flat)](http://cocoadocs.org/docsets/SDWebImage/) [![Pod License](http://img.shields.io/cocoapods/l/SDWebImage.svg?style=flat)](https://www.apache.org/licenses/LICENSE-2.0.html) [![Dependency Status](https://www.versioneye.com/objective-c/sdwebimage/3.3/badge.svg?style=flat)](https://www.versioneye.com/objective-c/sdwebimage/3.3) [![Reference Status](https://www.versioneye.com/objective-c/sdwebimage/reference_badge.svg?style=flat)](https://www.versioneye.com/objective-c/sdwebimage/references) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/rs/SDWebImage) This library provides an async image downloader with cache support. For convenience, we added categories for some `UIControl` elements like `UIImageView`. ## Features - [x] Categories for `UIImageView`, `UIButton`, `MKAnnotationView` adding web image and cache management - [x] An asynchronous image downloader - [x] An asynchronous memory + disk image caching with automatic cache expiration handling - [x] A background image decompression - [x] A guarantee that the same URL won't be downloaded several times - [x] A guarantee that bogus URLs won't be retried again and again - [x] A guarantee that main thread will never be blocked - [x] Performances! - [x] Use GCD and ARC ## Supported Image Formats - Image formats supported by UIImage (JPEG, PNG, ...), including GIF - WebP format (use the `WebP` subspec) ## Requirements - iOS 5.1.1+ / tvOS 9.0+ - Xcode 7.1+ #### Backwards compatibility - For iOS < 5.0, please use the last [2.0 version](https://github.com/rs/SDWebImage/tree/2.0-compat). ## Getting Started - Read this Readme doc - Read the [How to use section](https://github.com/rs/SDWebImage#how-to-use) - Read the [documentation @ CocoaDocs](http://cocoadocs.org/docsets/SDWebImage/) - Read [How is SDWebImage better than X?](https://github.com/rs/SDWebImage/wiki/How-is-SDWebImage-better-than-X%3F) - Try the example by downloading the project from Github or even easier using CocoaPods try `pod try SDWebImage` - Get to the [installation steps](https://github.com/rs/SDWebImage#installation) ## Who Uses It - Find out [who uses SDWebImage](https://github.com/rs/SDWebImage/wiki/Who-Uses-SDWebImage) and add your app to the list. ## Installation ## How To Use ```objective-c Objective-C: #import ... [imageView sd_setImageWithURL:[NSURL URLWithString:@"http://www.domain.com/path/to/image.jpg"] placeholderImage:[UIImage imageNamed:@"placeholder.png"]]; ``` ```swift Swift: imageView.sd_setImageWithURL(NSURL(string: "http://www.domain.com/path/to/image.jpg"), placeholderImage:UIImage(imageNamed:"placeholder.png")) ``` - For details about how to use the library and clear examples, see [The detailed How to use](https://raw.github.com/rs/SDWebImage/master/Docs/HowToUse.md) Common Problems --------------- ### Using dynamic image size with UITableViewCell UITableView determines the size of the image by the first image set for a cell. If your remote images don't have the same size as your placeholder image, you may experience strange anamorphic scaling issue. The following article gives a way to workaround this issue: [http://www.wrichards.com/blog/2011/11/sdwebimage-fixed-width-cell-images/](http://www.wrichards.com/blog/2011/11/sdwebimage-fixed-width-cell-images/) ### Handle image refresh SDWebImage does very aggressive caching by default. It ignores all kind of caching control header returned by the HTTP server and cache the returned images with no time restriction. It implies your images URLs are static URLs pointing to images that never change. If the pointed image happen to change, some parts of the URL should change accordingly. If you don't control the image server you're using, you may not be able to change the URL when its content is updated. This is the case for Facebook avatar URLs for instance. In such case, you may use the `SDWebImageRefreshCached` flag. This will slightly degrade the performance but will respect the HTTP caching control headers: ``` objective-c [imageView sd_setImageWithURL:[NSURL URLWithString:@"https://graph.facebook.com/olivier.poitrey/picture"] placeholderImage:[UIImage imageNamed:@"avatar-placeholder.png"] options:SDWebImageRefreshCached]; ``` ### Add a progress indicator See this category: https://github.com/JJSaccolo/UIActivityIndicator-for-SDWebImage Installation ------------ There are three ways to use SDWebImage in your project: - using CocoaPods - using Carthage - by cloning the project into your repository ### Installation with CocoaPods [CocoaPods](http://cocoapods.org/) is a dependency manager for Objective-C, which automates and simplifies the process of using 3rd-party libraries in your projects. See the [Get Started](http://cocoapods.org/#get_started) section for more details. #### Podfile ``` platform :ios, '6.1' pod 'SDWebImage', '~>3.7' ``` If you are using Swift, be sure to add `use_frameworks!` and set your target to iOS 8+: ``` platform :ios, '8.0' use_frameworks! ``` #### Subspecs There are 3 subspecs available now: `Core`, `MapKit` and `WebP` (this means you can install only some of the SDWebImage modules. By default, you get just `Core`, so if you need `WebP`, you need to specify it). Podfile example: ``` pod 'SDWebImage/WebP' ``` ### Installation with Carthage (iOS 8+) [Carthage](https://github.com/Carthage/Carthage) is a lightweight dependency manager for Swift and Objective-C. It leverages CocoaTouch modules and is less invasive than CocoaPods. To install with carthage, follow the instruction on [Carthage](https://github.com/Carthage/Carthage) #### Cartfile ``` github "rs/SDWebImage" ``` ### Installation by cloning the repository - see [Manual install](https://raw.github.com/rs/SDWebImage/master/Docs/ManualInstallation.md) ### Import headers in your source files In the source files where you need to use the library, import the header file: ```objective-c #import ``` ### Build Project At this point your workspace should build without error. If you are having problem, post to the Issue and the community can help you solve it. Future Enhancements ------------------- - LRU memory cache cleanup instead of reset on memory warning ## Licenses All source code is licensed under the [MIT License](https://raw.github.com/rs/SDWebImage/master/LICENSE). ## Architecture