项目介绍：

Vulcan

https://github.com/jinSasaki/Vulcan

Multi image downloader with priority in Swift
Swift多图片下载器

Features 功能

• Very light
  1、轻量级

• Multi image download with priority
  2、具有优先级的多图像下载

• Caching images
  3、图片缓存

• Pure Swift
  4、纯Swift开发

• Composable image
  5、可组合图像

• Support webp

• Now supported by Carthage only. See SwiftWebP.

Single download	Multi download with priority

Installation

CocoaPods

Setup CocoaPods:

$ gem install cocoapods

CocoaPods 1.1.0+ is required to build Vulcan

Podfile

platform :ios, '8.0'
use_frameworks!

target '<Your Target Name>' do
pod 'Vulcan'
end

Then, run the following command:

$ pod install

Carthage

Setup carthage:

$ brew update
$ brew install carthage

Cartfile

github "jinSasaki/Vulcan"

Usage

Image downloading and show

import Vulcan

// Single downloading
imageView.vl_setImage(url: URL(string: "/path/to/image")!)

// Multi downloading
// This image will be overridden by the image of higher priority URL.
imageView.vl_setImage(urls: [
    .url(URL(string: "/path/to/image")!, priority: 100),
    .url(URL(string: "/path/to/image")!, priority: 1000)
    ])

WebP image

Add SwiftWebP.framework.

import Vulcan
import SwiftWebP

extension WebPDecoder: ImageDecoder {
    public func decode(data: Data, response: HTTPURLResponse, options: ImageDecodeOptions?) throws -> Image {
        let contentTypes = response.allHeaderFields.filter({ ($0.key as? String ?? "").lowercased() == "content-type" })
        guard
            let contentType = contentTypes.first,
            let value = contentType.value as? String,
            value == "image/webp",
            let image = WebPDecoder.decode(data) else {
                return try DefaultImageDecoder().decode(data: data, response: response, options: options)
        }
        return image
    }
}

// Set decoder to shared ImageDownloader
UIImageView.vl_sharedImageDownloader.decoder = WebPDecoder()

// Request image with URL
imageView.vl_setImage(url: URL(string: "/path/to/image")!)

Requirements 环境需求

• iOS 8.0+

• Xcode 8.1+

• Swift 3.0.1+