URLSessionDelegate's didWriteData not call when app is going to background in iOS12
0
I want to implement downloading functionality which can show completed status of downloading task with the percentage. And I'm able to do that but the problem is when the app is moving to the background and come back to the foreground at that time the delegate method didWriteData is not called in iOS12. Can anyone please help me? Here is my code
protocol DownloadDelagate {
func downloadingProgress(value:Float)
func downloadCompleted(identifier: Int,url: URL)
}
class DownloadManager : NSObject, URLSessionDelegate, URLSessionDownloadDelegate {
static var shared = DownloadManager()
var delegate: DownloadDelagate?
var backgroundSessionCompletionHandler: (() -> Void)?
var session : URLSession {
get {
let config = URLSessionConfiguration.background(withIdentifier: "(Bundle.main.bundleIdentifier!).background")
config.isDiscretionary = true
config.sessionSendsLaunchEvents = true
return URLSession(configuration: config, delegate: self, delegateQueue: OperationQueue())
}
}
private override init() {
}
func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) {
DispatchQueue.main.async {
if let completionHandler = self.backgroundSessionCompletionHandler {
self.backgroundSessionCompletionHandler = nil
completionHandler()
}
}
}
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
delegate?.downloadCompleted(identifier: downloadTask.taskIdentifier, url: location)
}
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didWriteData bytesWritten: Int64, totalBytesWritten: Int64, totalBytesExpectedToWrite: Int64) {
if totalBytesExpectedToWrite > 0 {
let progress = Float(totalBytesWritten) / Float(totalBytesExpectedToWrite)
let progressPercentage = progress * 100
delegate?.downloadingProgress(value: progressPercentage)
print("Download with task identifier: (downloadTask.taskIdentifier) is (progressPercentage)% complete...")
}
}
func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
if let error = error {
print("Task failed with error: (error)")
} else {
print("Task completed successfully.")
}
}
}
swift downloading ios12
asked Nov 23 '18 at 9:14
Ankit Prajapati
519
add a comment |
0
I want to implement downloading functionality which can show completed status of downloading task with the percentage. And I'm able to do that but the problem is when the app is moving to the background and come back to the foreground at that time the delegate method didWriteData is not called in iOS12. Can anyone please help me? Here is my code
protocol DownloadDelagate {
func downloadingProgress(value:Float)
func downloadCompleted(identifier: Int,url: URL)
}
class DownloadManager : NSObject, URLSessionDelegate, URLSessionDownloadDelegate {
static var shared = DownloadManager()
var delegate: DownloadDelagate?
var backgroundSessionCompletionHandler: (() -> Void)?
var session : URLSession {
get {
let config = URLSessionConfiguration.background(withIdentifier: "(Bundle.main.bundleIdentifier!).background")
config.isDiscretionary = true
config.sessionSendsLaunchEvents = true
return URLSession(configuration: config, delegate: self, delegateQueue: OperationQueue())
}
}
private override init() {
}
func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) {
DispatchQueue.main.async {
if let completionHandler = self.backgroundSessionCompletionHandler {
self.backgroundSessionCompletionHandler = nil
completionHandler()
}
}
}
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
delegate?.downloadCompleted(identifier: downloadTask.taskIdentifier, url: location)
}
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didWriteData bytesWritten: Int64, totalBytesWritten: Int64, totalBytesExpectedToWrite: Int64) {
if totalBytesExpectedToWrite > 0 {
let progress = Float(totalBytesWritten) / Float(totalBytesExpectedToWrite)
let progressPercentage = progress * 100
delegate?.downloadingProgress(value: progressPercentage)
print("Download with task identifier: (downloadTask.taskIdentifier) is (progressPercentage)% complete...")
}
}
func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
if let error = error {
print("Task failed with error: (error)")
} else {
print("Task completed successfully.")
}
}
}
swift downloading ios12
asked Nov 23 '18 at 9:14
Ankit Prajapati
519
Take an object that is delegate of your DownloadManger. Adddeinit { print("class deinited") }in that object class. Now when you enter the background check whether your delegate object is still alive. You'll see printed statement if it was deinitialized. That basically means that your weak reference is freed and your function is not firing because it has no delegate.
– inokey
Nov 23 '18 at 9:46
add a comment |
0
0
0
I want to implement downloading functionality which can show completed status of downloading task with the percentage. And I'm able to do that but the problem is when the app is moving to the background and come back to the foreground at that time the delegate method didWriteData is not called in iOS12. Can anyone please help me? Here is my code
protocol DownloadDelagate {
func downloadingProgress(value:Float)
func downloadCompleted(identifier: Int,url: URL)
}
class DownloadManager : NSObject, URLSessionDelegate, URLSessionDownloadDelegate {
static var shared = DownloadManager()
var delegate: DownloadDelagate?
var backgroundSessionCompletionHandler: (() -> Void)?
var session : URLSession {
get {
let config = URLSessionConfiguration.background(withIdentifier: "(Bundle.main.bundleIdentifier!).background")
config.isDiscretionary = true
config.sessionSendsLaunchEvents = true
return URLSession(configuration: config, delegate: self, delegateQueue: OperationQueue())
}
}
private override init() {
}
func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) {
DispatchQueue.main.async {
if let completionHandler = self.backgroundSessionCompletionHandler {
self.backgroundSessionCompletionHandler = nil
completionHandler()
}
}
}
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
delegate?.downloadCompleted(identifier: downloadTask.taskIdentifier, url: location)
}
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didWriteData bytesWritten: Int64, totalBytesWritten: Int64, totalBytesExpectedToWrite: Int64) {
if totalBytesExpectedToWrite > 0 {
let progress = Float(totalBytesWritten) / Float(totalBytesExpectedToWrite)
let progressPercentage = progress * 100
delegate?.downloadingProgress(value: progressPercentage)
print("Download with task identifier: (downloadTask.taskIdentifier) is (progressPercentage)% complete...")
}
}
func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
if let error = error {
print("Task failed with error: (error)")
} else {
print("Task completed successfully.")
}
}
}
swift downloading ios12
asked Nov 23 '18 at 9:14
Ankit Prajapati
519
I want to implement downloading functionality which can show completed status of downloading task with the percentage. And I'm able to do that but the problem is when the app is moving to the background and come back to the foreground at that time the delegate method didWriteData is not called in iOS12. Can anyone please help me? Here is my code
protocol DownloadDelagate {
func downloadingProgress(value:Float)
func downloadCompleted(identifier: Int,url: URL)
}
class DownloadManager : NSObject, URLSessionDelegate, URLSessionDownloadDelegate {
static var shared = DownloadManager()
var delegate: DownloadDelagate?
var backgroundSessionCompletionHandler: (() -> Void)?
var session : URLSession {
get {
let config = URLSessionConfiguration.background(withIdentifier: "(Bundle.main.bundleIdentifier!).background")
config.isDiscretionary = true
config.sessionSendsLaunchEvents = true
return URLSession(configuration: config, delegate: self, delegateQueue: OperationQueue())
}
}
private override init() {
}
func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) {
DispatchQueue.main.async {
if let completionHandler = self.backgroundSessionCompletionHandler {
self.backgroundSessionCompletionHandler = nil
completionHandler()
}
}
}
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
delegate?.downloadCompleted(identifier: downloadTask.taskIdentifier, url: location)
}
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didWriteData bytesWritten: Int64, totalBytesWritten: Int64, totalBytesExpectedToWrite: Int64) {
if totalBytesExpectedToWrite > 0 {
let progress = Float(totalBytesWritten) / Float(totalBytesExpectedToWrite)
let progressPercentage = progress * 100
delegate?.downloadingProgress(value: progressPercentage)
print("Download with task identifier: (downloadTask.taskIdentifier) is (progressPercentage)% complete...")
}
}
func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
if let error = error {
print("Task failed with error: (error)")
} else {
print("Task completed successfully.")
}
}
}
swift downloading ios12
swift downloading ios12
asked Nov 23 '18 at 9:14
Ankit Prajapati
519
asked Nov 23 '18 at 9:14
Ankit Prajapati
519
edited Nov 23 '18 at 9:25
asked Nov 23 '18 at 9:14
Ankit Prajapati
519
asked Nov 23 '18 at 9:14
Ankit Prajapati
519
asked Nov 23 '18 at 9:14
Ankit Prajapati
519
519
Take an object that is delegate of your DownloadManger. Adddeinit { print("class deinited") }in that object class. Now when you enter the background check whether your delegate object is still alive. You'll see printed statement if it was deinitialized. That basically means that your weak reference is freed and your function is not firing because it has no delegate.
– inokey
Nov 23 '18 at 9:46
add a comment |
Take an object that is delegate of your DownloadManger. Adddeinit { print("class deinited") }in that object class. Now when you enter the background check whether your delegate object is still alive. You'll see printed statement if it was deinitialized. That basically means that your weak reference is freed and your function is not firing because it has no delegate.
– inokey
Nov 23 '18 at 9:46
Take an object that is delegate of your DownloadManger. Add
deinit { print("class deinited") } in that object class. Now when you enter the background check whether your delegate object is still alive. You'll see printed statement if it was deinitialized. That basically means that your weak reference is freed and your function is not firing because it has no delegate.– inokey
Nov 23 '18 at 9:46
Take an object that is delegate of your DownloadManger. Add
deinit { print("class deinited") } in that object class. Now when you enter the background check whether your delegate object is still alive. You'll see printed statement if it was deinitialized. That basically means that your weak reference is freed and your function is not firing because it has no delegate.– inokey
Nov 23 '18 at 9:46
add a comment |
1 Answer
1
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oldest
votes
0
Please try your code in AppDelegate's applicationWillEnterForeground(). You can make changes here when the app makes transition from Background to Active state.
answered Nov 23 '18 at 9:44
Bella
509
Would you please explain it with some sample code?
– Ankit Prajapati
Nov 23 '18 at 11:23
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
Please try your code in AppDelegate's applicationWillEnterForeground(). You can make changes here when the app makes transition from Background to Active state.
answered Nov 23 '18 at 9:44
Bella
509
Would you please explain it with some sample code?
– Ankit Prajapati
Nov 23 '18 at 11:23
add a comment |
0
Please try your code in AppDelegate's applicationWillEnterForeground(). You can make changes here when the app makes transition from Background to Active state.
answered Nov 23 '18 at 9:44
Bella
509
Would you please explain it with some sample code?
– Ankit Prajapati
Nov 23 '18 at 11:23
add a comment |
0
0
0
Please try your code in AppDelegate's applicationWillEnterForeground(). You can make changes here when the app makes transition from Background to Active state.
answered Nov 23 '18 at 9:44
Bella
509
Please try your code in AppDelegate's applicationWillEnterForeground(). You can make changes here when the app makes transition from Background to Active state.
answered Nov 23 '18 at 9:44
Bella
509
answered Nov 23 '18 at 9:44
Bella
509
answered Nov 23 '18 at 9:44
Bella
509
answered Nov 23 '18 at 9:44
Bella
509
509
Would you please explain it with some sample code?
– Ankit Prajapati
Nov 23 '18 at 11:23
add a comment |
Would you please explain it with some sample code?
– Ankit Prajapati
Nov 23 '18 at 11:23
Would you please explain it with some sample code?
– Ankit Prajapati
Nov 23 '18 at 11:23
Would you please explain it with some sample code?
– Ankit Prajapati
Nov 23 '18 at 11:23
add a comment |
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Take an object that is delegate of your DownloadManger. Add
deinit { print("class deinited") }in that object class. Now when you enter the background check whether your delegate object is still alive. You'll see printed statement if it was deinitialized. That basically means that your weak reference is freed and your function is not firing because it has no delegate.– inokey
Nov 23 '18 at 9:46