gukemanbu/SDWebImage

这个库提供了一个支持缓存的异步图像下载器。方便起见，我们为这些 UI 元素 UIImageView， UIButton， MKAnnotationView 等添加了分类。

功能特点

UIImageView, UIButton, MKAnnotationView 的分类，用于添加网络图片和缓存管理
图片异步下载
异步内存+磁盘缓存和自动缓存过期处理
后台解压图片
同一个 URL 不会被多次下载
无效的 url 不会被反复重试
不会阻塞主线程
高效！
使用 GCG 和 ARC

支持的图片格式

UIImage支持的图片格式（JPEG，PNG，……），包括 GIF
WebP 格式，包动 WebP 动画（使用WebP子集）

使用要求

iOS 7.0 及以上
tvOS 9.0 及以上
watchOS 2.0 及以上
macOS 10.9 及以上
Xcode 7.3 及以上

Backwards compatibility

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 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, submit a pull request.

How To Use

Objective-C

#import <SDWebImage/UIImageView+WebCache.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

Starting with the 4.0 version, we rely on FLAnimatedImage to take care of our animated images.
If you use cocoapods, add pod 'SDWebImage/GIF' to your podfile.
To use it, simply make sure you use FLAnimatedImageView instead of UIImageView.
Note: there is a backwards compatible feature, so if you are still trying to load a GIF into a UIImageView, it will only show the 1st frame as a static image by default. However, you can enable the full GIF support by using the built-in GIF coder. See GIF coder
Important: FLAnimatedImage only works on the iOS platform. For macOS, use NSImageView with animates set to YES to show the entire animated images and NO to only show the 1st frame. For all the other platforms (tvOS, watchOS) we will fallback to the backwards compatibility feature described above

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'

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 4 subspecs available now: Core, MapKit, GIF 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 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

Cartfile

github "rs/SDWebImage"

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 header file:

#import <SDWebImage/UIImageView+WebCache.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.

gukemanbu / SDWebImage