我使用“AlamoFireImage”下载我的图像文件。
在这之后,我用NSFileManager
和CreateFile
方法将它们保存在目录中。
但是,当我尝试检索保存的图像,它只是返回的第一个文件。虽然它应该已经保存15幅图像。
这是我对保存图像文件的功能:
func getImage(url: String) {
Alamofire.request("https://www.tandori.ir/uploads/categories/" + url).responseImage { (response) in
if response.result.value != nil {
do {
let fileManager = FileManager.default
let paths = (NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString).appendingPathComponent(url)
let image = UIImage(named: url)
let imageData = image?.jpegData(compressionQuality: 0.2)
fileManager.createFile(atPath: paths as String, contents: imageData, attributes: nil)
print(paths)
}
catch let error as NSError {
print(error)
}
}
}
}
这是我对他们下载功能:
func launchApp() {
let imgTitiles = UserDefaults.standard.array(forKey: "imgsArray")!
for pic in imgTitiles {
self.getImage(url: pic as! String)
print("done")
}
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let resultViewController = storyBoard.instantiateViewController(withIdentifier: "mainTab") as! TandoriTabView
self.present(resultViewController, animated: true)
}
当我尝试检索保存的图像,我得到控制台此错误:
“BOMStream BOMStreamWithFileAndSys(INT,off_t,为size_t,INT,CHAR *,BomSys *):读:没有这样的文件或目录”
我想显示在收集观看这些图像。
这是我在我的ViewController代码:
//Get Images Directory Path Function.
func getDirectoryPath() -> String {
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let documentsDirectory = paths[0]
return documentsDirectory
}
//Get Images Function.
func getImage(name : String) -> String {
_ = FileManager.default
let imagePAth = (self.getDirectoryPath() as NSString).appendingPathComponent(name)
return imagePAth
}
//Show Images in collectionView cells function.
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = categoriesCollection.dequeueReusableCell(withReuseIdentifier: "categories", for: indexPath) as! categoriesCell
let imageAddress = getImage(name: imgTitiles[indexPath.row] as! String) //TheRealShit
cell.categoryImage.image = UIImage(contentsOfFile: imageAddress)
return cell
}
似乎是什么问题?
提前致谢!
其实您使用Alamofire下载图像是异步。由于这一点,你只有少数图像时,你是显示视图 - 控制。修改代码以的getImage()同步在下面的代码。我希望它会为你工作。
func getImage(url: String) {
if let image = UIImage(named: url) {
let fileManager = FileManager.default
let paths = (NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString).appendingPathComponent(url)
let imageData = image?.jpegData(compressionQuality: 0.2)
fileManager.createFile(atPath: paths as String, contents: imageData, attributes: nil)
print(paths)
}
}