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This library provides an async image downloader with cache support. For convenience, we added categories for UI elements like UIImageView, UIButton, MKAnnotationView.

Features

Categories for UIImageView, UIButton, MKAnnotationView adding web image and cache management
An asynchronous image downloader
An asynchronous memory + disk image caching with automatic cache expiration handling
A background image decompression
Improved support for animated images
Customizable and composable transformations can be applied to the images right after download
Custom cache control
Expand the image loading capabilites by adding your own custom loaders or using prebuilt loaders like FLAnimatedImage plugin or Photos Library plugin
Loading indicators
A guarantee that the same URL won't be downloaded several times
A guarantee that bogus URLs won't be retried again and again
A guarantee that main thread will never be blocked
Performances!
Use GCD and ARC

Supported Image Formats

Image formats supported by UIImage (JPEG, PNG, ...), including GIF
WebP format, including animated WebP (use the SDWebImageWebPCoder project)
Support extendable coder plugins for new image formats. Like APNG, BPG, HFIF, SVG, etc. See all the list in Image coder plugin List

Additional modules

In order to keep SDWebImage focused and limited to the core features, but also allow extensibility and custom behaviors, during the 5.0 refactoring we focused on modularizing the library. As such, we have moved/built new modules to SDWebImage org.

Coders for additional image formats

SDWebImageWebPCoder - coder for WebP image format. Based on libwebp
SDWebImageHEIFCoder - coder to support HEIF image without Apple's Image/IO framework, iOS 8+/macOS 10.10+ support.
SDWebImageBPGCoder - coder for BPG format
SDWebImageFLIFCoder - coder for FLIF format
and more from community!

Loaders

SDWebImagePhotosPlugin - plugin to support loading images from Photos (using Photos.framework)

Integration with 3rd party libraries

SDWebImageFLPlugin - plugin to support FLAnimatedImage as the engine for animated GIFs
SDWebImageYYPlugin - plugin to integrate YYImage & YYCache for image rendering & caching
SDWebImageProgressiveJPEGDemo - demo project for using SDWebImage + Concorde library for Progressive JPEG decoding

Make our lives easier

libwebp-Xcode - A wrapper for libwebp + an Xcode project.

You can use those directly, or create similar components of your own.

Requirements

iOS 8.0 or later
tvOS 9.0 or later
watchOS 2.0 or later
macOS 10.10 or later
Xcode 9.0 or later

Backwards compatibility

For iOS 7, macOS 10.9 or Xcode < 8, use any 4.x version up to 4.4.6
For macOS 10.8, use any 4.x version up to 4.3.0
For iOS 5 and 6, use any 3.x version up to 3.7.6
For iOS < 5.0, please use the last 2.0 version.

Getting Started

Read this Readme doc
Read the How to use section
Read the Documentation @ CocoaDocs
Try the example by downloading the project from Github or even easier using CocoaPods try pod try SDWebImage
Read the Installation Guide
Read the SDWebImage 5.0 Migration Guide to get an idea of the changes from 4.x to 5.x
Read the SDWebImage 4.0 Migration Guide to get an idea of the changes from 3.x to 4.x
Read the Common Problems to find the solution for common problems
Go to the Wiki Page for more information such as Advanced Usage

Who Uses It

Find out who uses SDWebImage and add your app to the list.

Communication

If you need help, use Stack Overflow. (Tag 'sdwebimage')
If you'd like to ask a general question, use Stack Overflow.
If you found a bug, open an issue.
If you have a feature request, open an issue.
If you want to contribute, read the Contributing Guide

How To Use

Objective-C

#import <SDWebImage/SDWebImage.h>
...
[imageView sd_setImageWithURL:[NSURL URLWithString:@"http://www.domain.com/path/to/image.jpg"]
             placeholderImage:[UIImage imageNamed:@"placeholder.png"]];

Swift

import SDWebImage

imageView.sd_setImage(with: URL(string: "http://www.domain.com/path/to/image.jpg"), placeholderImage: UIImage(named: "placeholder.png"))

For details about how to use the library and clear examples, see The detailed How to use

Animated Images (GIF) support

In 5.0, we introduced a brand new mechanism for supporting animated images. This includes animated image loading, rendering, decoding, and also supports customizations (for advanced users). This animated image solution is available for iOS/tvOS/macOS. The SDAnimatedImage is subclass of UIImage/NSImage, and SDAnimatedImageView is subclass of UIImageView/NSImageView, to make them compatible with the common frameworks APIs. See Animated Image for more detailed information.

FLAnimatedImage integration has its own dedicated repo

In order to clean up things and make our core project do less things, we decided that the FLAnimatedImage integration does not belong here. From 5.0, this will still be available, but under a dedicated repo SDWebImageFLPlugin.

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 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 section for more details.

Podfile

platform :ios, '7.0'
pod 'SDWebImage', '~> 4.0'

Swift and static framework

Swift project previously have to use use_frameworks! to make all Pods into dynamic framework to let CocoaPods works.

However, start with CocoaPods 1.5.0+ (with Xcode 9+), which supports to build both Objective-C && Swift code into static framework. You can use modular headers to use SDWebImage as static framework, without the need of use_frameworks!:

platform :ios, '8.0'
# Uncomment the next line when you want all Pods as static framework
# use_modular_headers!
pod 'SDWebImage', :modular_headers => true

See more on CocoaPods 1.5.0 — Swift Static Libraries

If not, you still need to add use_frameworks! to use SDWebImage as dynamic framework:

platform :ios, '8.0'
use_frameworks!
pod 'SDWebImage'

Subspecs

There are 2 subspecs available now: Core and MapKit (this means you can install only some of the SDWebImage modules. By default, you get just Core, so if you need MapKit, you need to specify it).

Podfile example:

pod 'SDWebImage/MapKit'

Installation with Carthage (iOS 8+)

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

Carthage users can point to this repository and use whichever generated framework they'd like: SDWebImage, SDWebImageMapKit or both.

Make the following entry in your Cartfile: github "SDWebImage/SDWebImage" Then run carthage update If this is your first time using Carthage in the project, you'll need to go through some additional steps as explained over at Carthage.

NOTE: At this time, Carthage does not provide a way to build only specific repository subcomponents (or equivalent of CocoaPods's subspecs). All components and their dependencies will be built with the above command. However, you don't need to copy frameworks you aren't using into your project. For instance, if you aren't using SDWebImageMapKit, feel free to delete that framework from the Carthage Build directory after carthage update completes.

Installation by cloning the repository

see Manual install

Import headers in your source files

In the source files where you need to use the library, import the umbrella header file:

#import <SDWebImage/SDWebImage.h>

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.

README.md