How to open multiple windows one by one using a loop in OSX?

Question

I can open multiple windows using a loop. Now I want to open these windows one by one. That means when I close one window the next window will be opened, I mean till the close of the first window next window should not be opened. Using below code all windows are getting opened at a time.

let selectedFiles = ["file1","file2"] 
for eachfile in selectedFiles 
{ 
let storyBoard : NSStoryboard = NSStoryboard(name: "Main", bundle:nil)
let newViewController = storyBoard.instantiateController(withIdentifier: "MainView") as? ViewController  
if newViewController != nil 
{ 
 newViewController.ParentView = self 
 self.presentAsModalWindow(newViewController!)  
} 
}

I want the second window to open only after closing first window

AppKit

929

Posted by

SyamalaDutt

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Answer 1

Did you try to create a global Bool

var oneWindowOpened = false

then set to true each time you open a window and set to false when you close.

Use it in your loop:

if newViewController != nil  && !oneWindowOpened {  
     oneWindowOpened = true
     newViewController.ParentView =  self.presentAsModalWindow(newViewController!) 
}

Posted by

Claude31

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Answer 2

Did this make it work ? If not, please explain what happens. If yes, thanks to close the thread.

Posted by

Claude31

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Answer 3

No this didnt worked, for loop will not wait till window closes and it is iterating and coming out. I used while loop and it is blocking the execution. I am looking for standard way or any cocoa API to fix this. Thanks

Posted by

SyamalaDutt

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Answer 4

No this didnt worked, for loop will not wait till window closes and it is iterating and coming out.

You did not tell you wanted to control the timing as well.

I used while loop and it is blocking the execution.

Could you show what you did, that will make it easier to understand

I would try to execute in another thread. Take care, I did not test yet.

DispatchQueue.global().async {
     if newViewController != nil  && !oneWindowOpened {  
          oneWindowOpened = true
          DispatchQueue.main.async { () -> Void in
               self.newViewController.ParentView =  self.presentAsModalWindow(newViewController!)
         }
     }
}

If that does not work properly, you could introduce some waiting at line 4:

DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.001)     // wait 1ms. May have to adjust

Posted by

Claude31

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Answer 5

Did that fix your problem ?

If not, please explain.

If yes, thanks to close the thread.

Posted by

Claude31

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How to open multiple windows one by one using a loop in OSX?

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