This application is modifying the autolayout engine from a background thread

I am having the same issue. Did you find a solution?

It could be something as simple as setting a text field value or adding a subview inside a background thread, which may cause a field's layout to change. Make sure anything you do with the interface only happens in the main thread.

Hey!
If u use UITableView try to add UITableViewDelegate in your @interface

Only need to either wrap those methods that call UI updates with dispatch_asynch get main queue or inside those methodes functions that update UI.

XCode 7 and iOS 9 SDK because very strict, compared to previous versions, and that is good. I found many such mistakes in my project that was compiling before perfectly.

Under Xcode 7.1 I'm suddenly seeing this same error when calling...

[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus authorizationStatus)

It doesn't make sense!

dont know iof this is coming a bit late. I got the same message when changing from sendAsynchronousRequest to dataTaskWithRequest.

In my code I was setting up the contents of a UIImage.

I guess that is what this message means, i.e. that the code is changing the UI in a background thread.

But if you do not do it this way, how else are you supposed to update a UIImage?

The only other alternative would be a synchronous request and wait for it ???

Please start your own thread.

This only happens to me when using iPad Retina or iPad 2.

When selecting a newer model like iPad like Air, Air 2 or Pro I don't get the error.

I have the same issue in my swift programming code.

func backgroundThread(delay: Double = 0.0, background: (() -> Void)? = nil, completion: (() -> Void)? = nil) {

dispatch_async(dispatch_get_global_queue(Int(QOS_CLASS_USER_INITIATED.rawValue), 0)) {

if(background != nil){ background!(); }

let popTime = dispatch_time(DISPATCH_TIME_NOW, Int64(delay * Double(NSEC_PER_SEC)))

dispatch_after(popTime, dispatch_get_main_queue()) {

if(completion != nil){ completion!(); }

}

}

}

backgroundThread(background: {

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), {

self.fetchfeeder((url?.URL)!, callback: self.callbackData)

});

},

completion: {

print("Finish run background")

/

})

func fetchfeeder(url2: NSURL, callback:(String, String?)->Void) {

let request2=NSURLRequest(URL: url2)

let session2 = NSURLSession.sharedSession()

let task2 = session2.dataTaskWithRequest(request2) {

(data, header, error) -> Void in

if error != nil {

callback("",error!.localizedDescription)

} else {

let result=NSString(data: data!, encoding: NSUTF8StringEncoding)!

callback(result as String,nil)

}

}

task2.resume()

}

func callbackData(result:String, error:String?) {

if(error == nil){

let data=result.dataUsingEncoding(NSUTF8StringEncoding)

do {

menu = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers) as? NSMutableArray

mytable.reloadData()

activebar.hidden=true

} catch {

print("** Error json ***");

activebar.hidden=true

}

}

activebar.hidden=true

}

You have to interpret the error message as meaning "you tried to change the UI from a background thread". That will typically trigger autolayout, producing the actual message you saw.

What is 'activebar'? It sounds like a UI element, so you cannot set its "hidden" property from a background thread. Also, you should not send 'reloadData' to a table view on a background thread.

Its your main thread is conflicted or any other process is interrupting main thread so please call your method in side grand dispatch

dispatch_async(dispatch_get_main_queue()) {

}

This can solve your problem