图像未显示在collectionView中

作者: ࿏自ོ༾由ོ༽人͙⃡⌇
发布时间: 2024-12-21 08:09:41 (13小时前)
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0#
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一腔诗意 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”> <P> 请格式化您的下载代码，而不是将URL字符串保存到数组中以正确加载图像。我已经更新了代码。请参考下文。 </p> <pre> <code> //MARK: Image func downloadJson(){ let access_token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOjEwMjc2LCJpc3MiOiJodHRwczovL2hvbWlpdGVzdC5jby56YS9hcGkvbG9naW4iLCJpYXQiOjE1NTIxOTYwMjIsImV4cCI6MTU1NDc4ODAyMiwibmJmIjoxNTUyMTk2MDIyLCJqdGkiOiJBeTY5R0JkZDA5dWdFTDBhIn0.czpQQsC08vuTB8iGdTeEjjQUmzl6I5Cs0VQ8WeA5VaY" let headers = ["Authorization": "Bearer "+access_token+"", "Content-Type": "application/json"] Alamofire.request("https://homiitest.co.za/api/gallery", method: .get, parameters: nil, encoding: JSONEncoding.default, headers: headers).responseJSON { response in if response.result.isSuccess{ //print(response) let swiftyJson = JSON(response.data!) let productTemplate = swiftyJson["data"].array //print("hello there - \(productTemplate)") for product in productTemplate! { // print(product["image_medium"].stringValue) self.AllImage.append(product.stringValue) print("this is data - \(product.stringValue)") } self.collectionView!.reloadData() } } } </code> </pre> </DIV>

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1#
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清月 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”> <P> 如果您不想使用其他库，您仍然可以使用Alamofire <a href="https://github.com/Alamofire/AlamofireImage" rel="nofollow noreferrer"> AlamofireImage </A> ， <a href="https://github.com/AFNetworking/AFNetworking" rel="nofollow noreferrer"> AFNetworking </A> ， <a href="https://github.com/SDWebImage/SDWebImage" rel="nofollow noreferrer"> SDWebImage </A> 等 </p> <pre> <code> extension UIImageView { func showImages(imageURL: String) { Alamofire.request(imageURL, method: .get) .validate() .responseData(completionHandler: { (responseData) in self.image = UIImage(data: responseData.data!) }) }} </code> </pre> <P> 你可以像这样使用它： </p> <pre> <code> cell.myImage.showImages(AllImage[indexPath.row]) </code> </pre> </DIV>

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2#
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易米烊光 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”> <P> 如果您不想安装pod，请尝试此操作。让imageCache = NSCache（） </p> <pre> <code> extension UIImageView { func imageFromServerURL(_ URLString: String, placeHolder: UIImage?) { self.image = nil if let cachedImage = imageCache.object(forKey: NSString(string: URLString)) { self.image = cachedImage return } self.image = placeHolder if let url = URL(string: URLString) { URLSession.shared.dataTask(with: url, completionHandler: { (data, response, error) in if error != nil { print("ERROR LOADING IMAGES FROM URL: \(String(describing: error))") return } DispatchQueue.main.async { if let data = data { if let downloadedImage = UIImage(data: data) { imageCache.setObject(downloadedImage, forKey: NSString(string: URLString)) self.image = downloadedImage } } } }).resume() } } } </code> </pre> <P> 的<strong> 使用： </强> </p> <pre> <code> cell.myImage.imageFromServerURL(AllImage[indexPath.row], placeHolder:PLACEHOLDER_IMAGE) </code> </pre> <P> 如果您有任何疑问，请告诉我。 </p> </DIV>

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3#
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无语 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”> <P> UIImage（named：String）从资产目录中加载图像。由于AllImage包含图像网址，因此您需要先显示每个图像，然后才能显示它们。我推荐使用图书馆（ <a href="https://github.com/onevcat/Kingfisher" rel="nofollow noreferrer"> 翠鸟 </A> 是一个很棒的，相当容易使用）。您需要替换此行代码 </p> <pre> <code> cell.myImage.image = UIImage(named: AllImage[indexPath.row]) </code> </pre> <P> 同 </p> <pre> <code> let url = URL(string: AllImage[indexPath.row]) cell.myImage.kf.setImage(with: url) </code> </pre> </DIV>

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