50

我只需要获取 UIImage 而不是使用Kingfisher 库加载普通的 UIImageView

为了实现它，我使用 UIImageView 实现了一个解决方法：

let imageView = UIImageView()

imageView.kf_setImageWithURL(NSURL(string: cpa.imageName)!, placeholderImage: nil,
        optionsInfo: [.Transition(ImageTransition.Fade(1))],
        progressBlock: { receivedSize, totalSize in
            print("\(receivedSize)/\(totalSize)")
        },
        completionHandler: { image, error, cacheType, imageURL in
            anView!.image = image //anView IS NOT an UIImageView
            anView!.frame.size = CGSize(width: 15.0, height: 15.0)
            print("Finished")
    })

这段代码完美地工作，但我想以一种更干净的方式来做。这个库中是否有仅获取 UIImage 的方法？异步和缓存

4

8 回答 8

80

你可以使用这个retrieveImage(with:options:progressBlock: completionHandler:)方法KingfisherManager。

也许是这样的：

KingfisherManager.shared.retrieveImage(with: url, options: nil, progressBlock: nil, completionHandler: { image, error, cacheType, imageURL in
    print(image)
})
于 2016-03-10T13:02:34.883 回答
38

这是在 kingFisher 5 中下载图像的最新语法（在 swift 4.2 中测试）

func downloadImage(`with` urlString : String){
    guard let url = URL.init(string: urlString) else {
        return
    }
    let resource = ImageResource(downloadURL: url)

    KingfisherManager.shared.retrieveImage(with: resource, options: nil, progressBlock: nil) { result in
        switch result {
        case .success(let value):
            print("Image: \(value.image). Got from: \(value.cacheType)")
        case .failure(let error):
            print("Error: \(error)")
        }
    }
}

如何调用上述函数

self.downloadImage(with: imageURL) //replace with your image url
于 2019-01-22T07:34:15.347 回答
12

使用新的 Swift 3 版本，您可以使用 ImageDownloader ：

ImageDownloader.default.downloadImage(with: url, options: [], progressBlock: nil) {
    (image, error, url, data) in
    print("Downloaded Image: \(image)")
}

ImageDownloader是翠鸟的一部分，所以不要忘记import Kingfisher。

于 2016-11-25T16:40:13.767 回答
7

斯威夫特 5：

我将完成@Hardik Thakkar回答以添加更改，以便您可以使用可以帮助某人的闭包返回图像：

func downloadImage(with urlString : String , imageCompletionHandler: @escaping (UIImage?) -> Void){
        guard let url = URL.init(string: urlString) else {
            return  imageCompletionHandler(nil)
        }
        let resource = ImageResource(downloadURL: url)
        
        KingfisherManager.shared.retrieveImage(with: resource, options: nil, progressBlock: nil) { result in
            switch result {
            case .success(let value):
                imageCompletionHandler(value.image)
            case .failure:
                imageCompletionHandler(nil)
            }
        }
    }

如何调用：

 downloadImage(with :yourUrl){image in
     guard let image  = image else { return}
      // do what you need with the returned image.
 }
于 2020-08-14T23:07:44.263 回答
6

Kingfisher 5 中的另一种方式：

KingfisherManager.shared.retrieveImage(with: url) { result in
    let image = try? result.get().image
    if let image = image {
        ...
    }
}
于 2019-03-27T23:55:58.027 回答
4

在翠鸟 5

imageView.kf.setImage(with: url) { result in
   switch result {
   case .success(let value):
       print("Image: \(value.image). Got from: \(value.cacheType)")
   case .failure(let error):
       print("Error: \(error)")
   }
 }

查看更多：https ://github.com/onevcat/Kingfisher/wiki/Kingfisher-5.0-Migration-Guide

于 2019-03-13T04:04:53.807 回答
0

如果你想通过 api 调用自定义 UIImageView 的 UILabel。

import Kingfisher

func getImage(imageUrl: String,title:String?=nil){

        let someTitle = UILabel()
        view.addSubview(someTitle)
        someTitle.text = title
        someTitle.isHidden = true
       
        someTitle.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
        someTitle.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
        someTitle.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
        someTitle.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true

        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) { [self] in
            let url = URL(string: imageUrl )
            yourImage.kf.setImage(
                with: url,
                placeholder:  (someTitle as? Placeholder),
                options: [
                    .loadDiskFileSynchronously,
                    .cacheOriginalImage,
                    .transition(.fade(0.25))
                ],
                completionHandler: { result in
                    // Done
                    switch result {
                    case .success(let value):
                         self.yourImage.image = value.image
                    case .failure(let error):
                        someTitle.isHidden = false
                    }
                }
            )
                        
        }
    }

只需调用控制器中的函数


getImage(imageUrl: you_url, title: your_name)
于 2021-07-29T17:11:27.200 回答
0

雨燕 5 翠鸟 5

此代码 100% 有效

YourImageView.kf.setImage(with: URL(string: imagePath), placeholder: nil, options: nil, progressBlock: nil, completionHandler: { result in
switch result {
    case .success(let value):
                print("Image: \(value.image). Got from: \(value.cacheType)")
    case .failure(let error):
                print("Error: \(error)")
    }
})

//OR
let resource = ImageResource(downloadURL: picUrl!)
KingfisherManager.shared.retrieveImage(with: resource, options: nil, progressBlock: nil) { result in
    switch result {
        case .success(let value):
        print("Image: \(value.image). Got from: \(value.cacheType)")
        imageProfile = value.image
        case .failure(let error):
            print("Error: \(error)")
        }
    }
于 2021-08-27T04:02:46.367 回答