我使用此代码下载我的文件并在我的标签中显示下载进度。
我的代码:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! MasterViewCell
let cellFilePath = "\(indexPath.section)\(indexPath.row).zip"
let indexOfTask = allDownloadTasks.index { (task:URLSessionDownloadTask) -> Bool in
return task.currentRequest?.url?.lastPathComponent == cellFilePath
}
if indexOfTask == nil {
//cell.label?.isHidden = true
}
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let path = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentDirectoryPath:String = path[0]
let fileManager = FileManager()
let destinationURLForFile = URL(fileURLWithPath: documentDirectoryPath.appendingFormat("/file.png"))
if fileManager.fileExists(atPath: destinationURLForFile.path){
animation()
} else {
let url = URL(string: "link")!
let downloadTaskLocal = self.backgroundSession.downloadTask(with: url)
self.allDownloadTasks.append(downloadTaskLocal) // Add a new task to the array
downloadTaskLocal.resume()
cell.label?.frame = CGRect(x: 70, y: 128, width: 82, height: 21)
cell.label?.isHidden = false
}
}
func urlSession(_ session: URLSession,
downloadTask: URLSessionDownloadTask,
didWriteData bytesWritten: Int64,
totalBytesWritten: Int64,
totalBytesExpectedToWrite: Int64){
DispatchQueue.main.async(execute: {() -> Void in
if let visibleIndexPath = self.collectionView?.indexPathsForVisibleItems {
for visibleIndexPath in visibleIndexPath {
if (downloadTask.currentRequest?.url?.lastPathComponent == "\(visibleIndexPath.section)\(visibleIndexPath.row).zip") {
var myCell = self.collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: visibleIndexPath) as! MasterViewCell
myCell = self.collectionView?.cellForItem(at: visibleIndexPath) as! MasterViewCell
myCell.label.text = "\(Int(CGFloat(totalBytesWritten) / CGFloat(totalBytesExpectedToWrite) * 100.0))%"
if myCell.label?.text == "100%" {
myCell.label?.isHidden = true
myCell.activityIndicator?.isHidden = true
myCell.activityIndicator?.startAnimating()
}
}
}
}
})
}
我有这个代码来解压缩我的文件:
func urlSession(_ session: URLSession,
downloadTask: URLSessionDownloadTask,
didFinishDownloadingTo location: URL){
let fileName = downloadTask.originalRequest?.url?.lastPathComponent
let path = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentDirectoryPath:String = path[0]
let fileManager = FileManager()
let destinationURLForFile = URL(fileURLWithPath: documentDirectoryPath.appendingFormat("/\(String(describing: fileName!))"))
do {
try fileManager.moveItem(at: location, to: destinationURLForFile)
}catch{
print("error")
}
let indexOfComplatedTask = allDownloadTasks.index(of: downloadTask)
if indexOfComplatedTask != nil {
SSZipArchive.unzipFile(atPath: documentDirectoryPath.appendingFormat("/\(String(describing: fileName!))"), toDestination:documentDirectoryPath, delegate:self)
do {
try fileManager.removeItem(atPath: documentDirectoryPath.appendingFormat("/\(String(describing: fileName!))"))
}
catch let error as NSError {
print("Ooops! Something went wrong: \(error)")
}
}
}
我想在文件解压缩时显示我的 activityIndicator
动画,并在文件停止解压缩后停止动画并删除它。我还在 Storyboard 中创建标签和事件指示器。
怎么做??????
检查下面的代码。
do {
try fileManager.moveItem(at: location, to: destinationURLForFile)
}catch{
print("error")
}
let indexOfComplatedTask = allDownloadTasks.index(of: downloadTask)
if indexOfComplatedTask != nil {
**// Start animating your activityIndicator here.
// Use unzipFile API having completion block callback
// In the completion callback stop your activityIndicator**
SSZipArchive.unzipFile(atPath: documentDirectoryPath.appendingFormat("/\(String(describing: fileName!))"), toDestination:documentDirectoryPath, delegate:self)
如果有任何疑问,请告诉我。
关于ios - swift:文件解压缩时显示 UIActivityIndicatorView,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51629230/
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