AlamofireImage保存到缓存的图像并未真正保存 [英] AlamofireImage saved-to-cache images are not really saved
本文介绍了AlamofireImage保存到缓存的图像并未真正保存的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在使用(尝试)AlamofireImage。
我保存到缓存的图像并未真正保存。
I'm using (trying) AlamofireImage. My saved-to-cache images are not really saved.
我的代码包括:
import Alamofire
import AlamofireImage
let imageCache = AutoPurgingImageCache(
memoryCapacity: 100 * 1024 * 1024,
preferredMemoryUsageAfterPurge: 60 * 1024 * 1024
)
然后我自己使用以下方式保存图像:
then i am saving an image myself using:
imageCache.add(image, withIdentifier: path)
,但是在下一次运行中,当我尝试使用相同的路径获取此图像时,它始终返回nil:
but in the next run, it always returns nil when i try to fetch this image using the same path:
if let image = imageCache.image(withIdentifier: path){
return image
}
return nil
我在做什么错了?
- 在运行\调试时我可以看到表示imageCache-currentMemoryUsage = 0
谢谢。
推荐答案
您不需要调用add()方法。我创建了包装Alamofire图片缓存的自定义类。
You don't need to call add() method. I create my custom class which wrap Alamofire Image cache.
class ImageManager: NSObject {
static let shared = ImageManager()
private var imageDownloader: ImageDownloader!
private var imageCache: AutoPurgingImageCache!
// Configuration
var maximumActiveDownloads = 5
var placeholderImage: UIImage!
var imageTransitionDuration: NSTimeInterval = 0.5
// The total memory capacity of the cache in MB.
var memoryCapacity: UInt64 = 150
//The preferred memory usage after purge in MB. During a purge, images will be purged until the memory capacity drops below this limit.
var memoryUsageAfterPurge: UInt64 = 60
private override init() {
super.init()
imageCache = AutoPurgingImageCache(
memoryCapacity: memoryCapacity * 1024 * 1024,
preferredMemoryUsageAfterPurge: memoryUsageAfterPurge * 1024 * 1024
)
imageDownloader = ImageDownloader(
configuration: ImageDownloader.defaultURLSessionConfiguration(),
downloadPrioritization: .FIFO,
maximumActiveDownloads: maximumActiveDownloads,
imageCache: imageCache
)
UIImageView.af_sharedImageDownloader = imageDownloader
}
func setImageOrPlaceholder(onImageView imageView: UIImageView, stringURL: String?) {
guard let correctURL = NSURL.getURL(fromString: stringURL) else {
//debug("URL incorrect!: \(stringURL)", isError: true)
imageView.image = placeholderImage
return
}
let imageTransition: UIImageView.ImageTransition = .CrossDissolve(imageTransitionDuration)
imageView.af_setImageWithURL(correctURL,
placeholderImage: placeholderImage,
filter: nil,
imageTransition: imageTransition,
completion: { response in
// debug("\(response.result.value)")
})
} }
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