ios,objective-c,uitableview,setneedsdisplay
You'll could always reload the cell by calling [self.tableView reloadRows[email protected][indexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; In order to prevent the infinite loop once you successfully download an image you'll want to cache the results. How long you cache is up to you. NSCache *imageCache = [[NSCache alloc] init]; imageCache.name = @"My Image Cache"; UIImage...
From the documentation: When the actual content of your view changes, it is your responsibility to notify the system that your view needs to be redrawn. You do this by calling your view’s setNeedsDisplay or setNeedsDisplayInRect: method of the view. These methods let the system know that it should update...
ios,uiview,autolayout,setneedsdisplay
Since you are using AutoLayout, you should change 'constant' value of the constraints associated with the views, rather than directly changing their frames. You can start by creating an IBOutlets/IBOutletCollection to the constraints you want to change and then using those IBoutlets you can change their 'constant' value....
ios,objective-c,multithreading,setneedsdisplay
You can't update the user interface on a background thread. In your background thread, change [object setNeedsDisplay]; to [object performSelectorOnMainThread:@selector(setNeedsDisplay) withObject:nil waitUntilDone:NO]; ...
ios,objective-c,uitableview,setneedsdisplay
I think you need to read up on the run loop and setNeedsDisplay (which I don't think does what you're expecting). Basically, the UI does not get updated until your code finishes executing. The pattern you need for displaying a complex calculation is something like this: -(void)Initialiseer { dispatch_async(dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0),...
ios,xcode,swift,uiview,setneedsdisplay
Create an outlet for between your View on Storyboard and DrawGraph, suppose you name it DrawGraphV, be sure that view is Custom class DrawGraph, you don't need the method updateModell, just call directly DrawGraphV.SetNeedsDisplay