Asynchronous image downloader with cache support as a UIImageView category

License: MIT

Language: Objective-C

Keywords: cache, carthage, cocoapods, gif, image, ios, jpeg, macos, objective-c, png, swift, tvos, watchos, webp

Build Status Pod Version Pod Platform Pod License Carthage compatible SwiftPM compatible codecov

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


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


Integration with 3rd party libraries

Make our lives easier

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


  • iOS 8.0 or later
  • tvOS 9.0 or later
  • watchOS 2.0 or later
  • macOS 10.10 or later
  • Xcode 10.0 or later

Backwards compatibility

Getting Started

Who Uses It


  • 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:@""]
             placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
  • Swift
import SDWebImage

imageView.sd_setImage(with: URL(string: ""), placeholderImage: UIImage(named: "placeholder.png"))

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.


There are four ways to use SDWebImage in your project:

  • using CocoaPods
  • using Carthage
  • using Swift Package Manager
  • manual install (build frameworks or embed Xcode Project)

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.


platform :ios, '8.0'
pod 'SDWebImage', '~> 5.0'
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'
pod 'SDWebImage'


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 with Swift Package Manager (Xcode 11+)

Swift Package Manager (SwiftPM) is a tool for managing the distribution of Swift code as well as C-family dependency. From Xcode 11, SwiftPM got natively integrated with Xcode.

SDWebImage support SwiftPM from version 5.1.0. To use SwiftPM, you should use Xcode 11 to open your project. Click File -> Swift Packages -> Add Package Dependency, enter SDWebImage repo's URL. Or you can login Xcode with your GitHub account and just type SDWebImage to search.

After select the package, you can choose the dependency type (tagged version, branch or commit). Then Xcode will setup all the stuff for you.

If you're a framework author and use SDWebImage as a dependency, update your Package.swift file:

let package = Package(
    // 5.1.0 ..< 6.0.0
    dependencies: [
        .package(url: "", from: "5.1.0")
    // ...

Manual Installation Guide

See more on Manual install Guide

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.




All source code is licensed under the MIT License.


High Level Diagram

Overall Class Diagram

Top Level API Diagram

Main Sequence Diagram

More detailed diagrams

Project Statistics

Sourcerank 14
Repository Size 10.6 MB
Stars 21,748
Forks 5,456
Watchers 851
Open issues 18
Dependencies 4
Contributors 244
Tags 81
Last updated
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Top Contributors See all

DreamPiggy Bogdan Poplauschi Olivier Poitrey Wu Zhong Konstantinos K. Kinarobin Matej Bukovinski Fabrice Aneche Matt Galloway Anton Popovichenko BB9z Morita Naoki Andy LaVoy Klaas Pieter Annema Florent Vilmart Jimmie Jensen Chester Liu jianlin gsempe Roman Podymov

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Recent Tags See all

5.1.0 August 03, 2019
5.1.0 August 03, 2019
5.0.6 June 05, 2019
4.4.7 June 05, 2019
4.4.7 June 05, 2019
3.8.3 June 05, 2019
5.0.5 June 03, 2019
5.0.5 June 03, 2019
5.0.4 June 03, 2019
5.0.4 June 03, 2019
5.0.3 May 16, 2019
5.0.3 May 16, 2019
5.0.2 April 25, 2019
5.0.1 April 11, 2019
5.0.0 April 02, 2019

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