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Swift run multiple block of codes asynchronously in background thread in order


By : Ashutosh Anshu
Date : October 18 2020, 06:10 PM
this will help DispatchQueue.global() is a concurrent queue which means any 2 tasks will run in parallel whatever 1 ends the first
if you need to run them serially then either chain them one after the other or create a custom serial queue and dispatch the tasks in it like
code :
let serialQueue = DispatchQueue(label: "queuename")
serialQueue.sync { 
   // task 1
}

serialQueue.sync { 
  // task 2     
}


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Open a modal form from a background thread to block UI thread without also blocking background thread


By : Augusto Calvo Losada
Date : March 29 2020, 07:55 AM
may help you . I disagree.
All that needs to be done is to change Invoke() to BeginInvoke() and you're golden.
code :
Public Class Form1

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        If Not BackgroundWorker1.IsBusy Then
            BackgroundWorker1.RunWorkerAsync()
        End If
    End Sub

    Private Delegate Sub BlockingDelegate(ByVal reason As String)

    Private Sub StartBlockingTask(ByVal reason As String)
        If Me.InvokeRequired Then
            Dim del As New BlockingDelegate(AddressOf StartBlockingTask)
            Me.BeginInvoke(del, New Object() {reason})
        Else
            Try
                _frmBlock.lblBlock.Text = reason
                _frmBlock.ShowDialog()
            Catch ex As Exception
                'stuff
            End Try
        End If
    End Sub

    Private Sub EndBlockingTask()
        If Me.InvokeRequired Then
            Dim del As New BlockingDelegate(AddressOf EndBlockingTask)
            Me.BeginInvoke(del, New Object() {""})
        Else
            Try
                If (Not _frmBlock Is Nothing) Then
                    _frmBlock.DialogResult = Windows.Forms.DialogResult.OK
                End If
            Catch ex As Exception
                'stuff
            End Try
        End If
    End Sub

    Private Sub BackgroundWorker1_DoWork(sender As System.Object, e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        For i As Integer = 1 To 10
            BackgroundWorker1.ReportProgress(i)
            System.Threading.Thread.Sleep(1000)

            If i = 4 Then
                Dim del As New BlockingDelegate(AddressOf StartBlockingTask)
                del("bada...")
            ElseIf i = 7 Then
                Dim del As New BlockingDelegate(AddressOf EndBlockingTask)
                del("bing!")
            End If
        Next
    End Sub

    Private Sub BackgroundWorker1_ProgressChanged(sender As Object, e As System.ComponentModel.ProgressChangedEventArgs) Handles BackgroundWorker1.ProgressChanged
        Label1.Text = e.ProgressPercentage
    End Sub

End Class

different background color for different block of codes


By : Anthony Horn
Date : March 29 2020, 07:55 AM
should help you out If you're talking about coloring the code blocks that you're writing inside Aptana Studio itself (rather than the colors of the rendered objects in the browser) you may wish to install an Aptana IDE Theme.
This will allow you to choose the color of different keywords, languages and sections.

Implementing a long running background thread that interacts with multiple controllers in Swift


By : xenz
Date : March 29 2020, 07:55 AM
Does that help Why not create a singleton ApiController that has GCD and does all the api calls and notifies your view controllers, this singleton class can be called from any view controller and once you enable run in the background, it should have to permission to run in the background.

Calling multiple individual thread asynchronously.But one thread stuck in loop and another thread doesn't execute


By : muhsin goose
Date : March 29 2020, 07:55 AM
hope this fix your issue The problem here is that your client is just a runnable. It needs a backing thread to run its code.
When you call
code :
client2.run();
new Thread(client2).start();

How to pass a parameter to a block executed asynchronously in Swift?


By : user3557837
Date : March 29 2020, 07:55 AM
this will help dispatch_async_f() can be used in C code, which has no blocks or closures.
In Swift you simply pass a closure, and the closure calls the function:
code :
DispatchQueue.global().async {
    let theParameter = ...
    theFunction(theParameter)
}
let theParameter = ...
DispatchQueue.global().async {
    theFunction(theParameter)
}
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