高性能且易于使用的 GIF 引擎

斯威夫特吉夫

高性能和易于使用的GIF引擎

语言切换: 한국어

特征

  • 基于 UIImage 和 UIImageView 扩展
  • 带有可自定义加载器的远程 GIF
  • 出色的 CPU/内存性能
  • 控制播放
  • 允许使用“完整性级别”控制显示质量
  • 允许通过“内存限制”进行控制 CPU/内存权衡

安装

与可可豆荚

source 'https://github.com/CocoaPods/Specs.git'
use_frameworks!
pod 'SwiftyGif'

With Carthage

Follow the usual Carthage instructions on how to add a framework to an application. When adding SwiftyGif among the frameworks listed in , apply its syntax for GitHub repositories:Cartfile

github "kirualex/SwiftyGif"

With Swift Package Manager

https://github.com/kirualex/SwiftyGif.git

How to Use

Project files

projec-file-explain

As of now, Xcode folders do not recognize as images. This means you need to put your outside of the assets. I recommend creating a group for instance.xcassets.gif.gifgif

Quick Start

SwiftyGif uses familiar and to display gifs.UIImageUIImageView

Programmaticaly

import SwiftyGif

do {
    let gif = try UIImage(gifName: "MyImage.gif")
    let imageview = UIImageView(gifImage: gif, loopCount: 3) // Will loop 3 times
    imageview.frame = view.bounds
    view.addSubview(imageview)
} catch {
    print(error)
}

Directly from nib/storyboard

@IBOutlet var myImageView : UIImageView!
...

let gif = try UIImage(gifName: "MyImage.gif")
self.myImageView.setGifImage(gif, loopCount: -1) // Will loop forever

Remote GIFs

// You can also set it with an URL pointing to your gif
let url = URL(string: "...")
let loader = UIActivityIndicatorView(style: .white)
cell.gifImageView.setGifFromURL(url, customLoader: loader)

SwiftUI

Add this to your code.UIViewRepresentable

struct AnimatedGifView: UIViewRepresentable {
    @Binding var url: URL

    func makeUIView(context: Context) -> UIImageView {
        let imageView = UIImageView(gifURL: self.url)
        imageView.contentMode = .scaleAspectFit
        return imageView
    }

    func updateUIView(_ uiView: UIImageView, context: Context) {
        uiView.setGifFromURL(self.url)
    }
}

Then to use it:

AnimatedGifView(url: Binding(get: { myModel.gif.url }, set: { _ in }))

Performances

A can hold one or several UIImageView using the same memory pool. This allows you to tune the memory limits to your convenience. If no manager is declared, SwiftyGif will just use the .SwiftyGifManagerSwiftyGifManager.defaultManager

Level of integrity

Setting a lower level of integrity will allow for frame skipping, lowering both CPU and memory usage. This can be a good option if you need to preview a lot of gifs at the same time.

do {
    let gif = try UIImage(gifName: "MyImage.gif", levelOfIntegrity:0.5)
} catch {
    print(error)
}

Controls

SwiftyGif offers various controls on the current playing your gif file.UIImageView

self.myImageView.startAnimatingGif()
self.myImageView.stopAnimatingGif()
self.myImageView.showFrameAtIndexDelta(delta: Int)
self.myImageView.showFrameAtIndex(index: Int)

To allow easy use of those controls, some utility methods are provided :

self.myImageView.isAnimatingGif() // Returns whether the gif is currently playing
self.myImageView.gifImage!.framesCount() // Returns number of frames for this gif

Delegate

You can declare a SwiftyGifDelegate to receive updates on the gif lifecycle. For instance, if you want your controller to act as the delegate:MyController

override func viewDidLoad() {
        super.viewDidLoad()
        self.imageView.delegate = self
}

Then simply add an extension:

extension MyController : SwiftyGifDelegate {

    func gifURLDidFinish(sender: UIImageView) {
        print("gifURLDidFinish")
    }

    func gifURLDidFail(sender: UIImageView) {
        print("gifURLDidFail")
    }

    func gifDidStart(sender: UIImageView) {
        print("gifDidStart")
    }
    
    func gifDidLoop(sender: UIImageView) {
        print("gifDidLoop")
    }
    
    func gifDidStop(sender: UIImageView) {
        print("gifDidStop")
    }
}

Benchmark

Display 1 Image

CPU Usage(average) Memory Usage(average)
FLAnimatedImage 35% 9,5Mb
SwiftyGif 2% 18,4Mb
SwiftyGif(memoryLimit:10) 34% 9,5Mb

Display 6 Images

CPU Usage(average) Memory Usage(average)
FLAnimatedImage 65% 25,1Mb
SwiftyGif 22% 105Mb
SwiftyGif(memoryLimit:20) 45% 26Mb

Measured on an iPhone 6S, iOS 9.3.1 and Xcode 7.3.

GitHub

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