Uilabel setneedsdisplay not working But I have a problem that my label display text not well when I use setNeedsDisplay,as below: when I comment out [cell setNeedsDisplay]; then the text of label is display well. ---This vid This second output is from redrawing due to the customView. Aucun Each row consist of UIView, inside this view there are the dot and the UILabel. cornerRadius = 5. text = @"This is a Label" followed by [cell setNeedsDisplay];, the text does not appear and I have to scroll the tableview causing the cells to reload, and only then the text in the label finally appears. When I click the button, the background changes to white, but the label text colors do not update, I believe that is because it is not redrawing them. Scenario 1 : The dynamically calculated font is properly set on the first collection view cells. setNeedsDisplay not working inside a block. All other collection view cells are showing font sizes set from Storyboard. -setNeedsDisplay schedules a view to be updated in a subsequent run loop—it doesn't trigger a re-draw immediately. So, if the post-rotation size of your view is smaller than the pre-rotation size, it will essentially draw your view at that smaller size, but I'm working on a project, where i have to update the text of a UILabel really regularly (0. I then linked the PolyView to the controller (or the other way around, still kinda confused about that). 2) Assign the text into the UILabel, which already has a superview at that point (not sure The most common reason for sizeToFit not working properly is the UILabel not having any autolayout constraints, for instance if you're implicitly relying on the view position remaining fixed relative to the top left. myView setNeedsDisplay] and it works perfectly. 1-setNeedsDisplay not getting called to refresh drawRect. 2 setNeedsDisplay only gets called once and works great and is styled correctly. UILabel) with autoLayout setNeedsDisplay not working inside a block. Questions: In general for UILabel clickable issue: There are couple of reasons why your UILabel will not work as clickable. Follow asked Jul 10, 2009 at 18:40. setNeedsDisplay. This is a book Then my code i set. NOOOOOOO! The idea of contemplating using such a heavyweight control for I'm trying to grow a uitableview cell when the user presses into the cell. I already have done some more work with UILabel and UIImage. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company As you can see, i have a list of collection view here, and some product are having promotion price and some are not. Here is the code: protocol SessionDisplayViewDelegate: class { func homeButtonTapped() } class SessionDisplayView: UIView { @IBOutlet var view: UIView! @IBOutlet weak var accountImage: UIButton! Sadly, it would take an entire book to explain thread safety throughly. Modified 10 years, 6 months ago. If you use another simple idea its work fine and also very easy. I'm using CMMotionManager for retrieving accelerometer data. Commented Feb 21 I have created UITableCellView class called NoteCell. There is one more odd thing about this is that if I add more characters to the string they are shown but the last 2 lines are still truncated. I want to display some sort of time elapsed to the user. As a start I just want to update a UILabel on my _countUpView UIView when the download has finished and the unzipping begins. What I wish for: I wish for a label which is hidden and uneditable when the view loads or when pressing a button besides the button with the tag "15", and by pressing the button with the tag "15" is the only way for the label to show up and be editable. If you have long-running code in the main event loop (i. However, I have set a delegate once the content is there to update the layout for which I am calling setNeedsDisplay. A UILabel in my . Viewed 969 times Part of Mobile Development Collective 0 I am trying to figure out the height of a long string "one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen" as would be needed to To know the size of the first line, I need to preload the UILabel in the titleView. This should be occurring on the main thread already, but I have tried adding the dispatch. On a device with iOS 7. Not that I know of. The tap gesture is only recognized within the view's bounds and since you didn't have any text in the UILabel, the bounds were zero giving you no place to click it. – When calling [polygonShapeView setNeedsDisplay]; my polygonShapeView drawRect method is NOT called. 0, 0. Drawing is based on one parameter that is being changed by a simple NSSlider. You may have to split your calculation up into chucks that can be called separately by the timer, maybe a state machine with a switch statement (select chunk, execute chunk I have two scenarios where this works well, When the app loads the colelctionview is hidden from user. – user2277872. If your label is included in a nib or storyboard as a subview of the view of a ViewController that uses autolayout, then putting your I've tried setNeedsLayout and setNeedsDisplay on the UILabel, the UITableViewCell, the UITableView and the view controller loading the table. Discover why your UILabel isn't appearing in your UIView and learn how to properly set constraints in Swift to resolve this common issue in UIKit. 483. If I move setNeedsDisplay to the end of the block it does NOT work. and updating text field not working. A worker thread updates a string and calls a method on the view that changes the text in a In an early test case, I tried using setNeedsDisplay instead of setNeedsDisplayInRect for the counter, and it started drawing the counter at the wrong place Instead, if you want a view to redraw immediately, you should call its setNeedsDisplay() method like this: myButton. 1. without it, animation will be ignored and the label will move to the given position. The only exception is when I do a "sizeToFit" function call however at that time, the text no longer appears in the center of the parent view. Thanks Not quite. - (void)updateDateLabel { NSDateFormatter *outputFormatter = I have set my UILabel padding using StackOverflow's popular thread for resolving auto-layout issue. SetNeedsDisplay(); Hi. 0. We would like to show you a description here but the site won’t allow us. zero { didSet { setNeedsDisplay() } } override public var intrinsicContentSize: CGSize { let size = super. I'm having problems when Im trying to call this from inside of the UIView itselfI have a notification being sent from another class, and it A UILabel will do everything needed for updates when you set its text property. Image of my view controller layout here. 0f; On a device with iOS 7. I am downloading an audio to my device and using UILabel to show the download percent completed. SPONSORED Alex is the iOS & Mac developer’s ultimate AI assistant. Also I called setNeedsDisplay from a non main thread and it worked too. 25; You don't need to call setNeedsLayout or setNeedsDisplay explicitely on the label. Envoyer par e-mail BlogThis! Partager sur Twitter Partager sur Facebook Partager sur Pinterest. That still doesn't explain why you need an array. I took this out for testing and found Temporarily change the background the colour of the UILabel in your prototype, us that to see if the label is actually on the screen and not being hidden by one of the other labels – Flexicoder Commented Oct 31, 2014 at 17:04 Now I know that all this code is working since the subview changes it's background color and the testLabel gets the correct text since it's printed out by the NSLog statement. OSLabel. I have a problem redrawing a custom view in simple cocoa application. netUtil. clipsToBounds on UILabel not working. Mark Amery gave a fix for NIBs and Storyboards using Auto Layout in the comments:. I'm working my way though this class as well, but I'm running into a semi-issue. [UILabel setNeedsDisplay] must be used from main thread only" – Halil ibrahim yüce. I'm using XCode 7. The code is about as straight forward as I can make it: Edit: Expanded the code to everything relevant Edit2: TL;DR Everything works with the exception of UIViewAnimateWithDuration which seems to ignore the block and duration and just run the code inline as an immediate UI change. You can send that message to a view but not to a string. – antf. It sounds like it should be always called when you updating any property which may change the presentation. In broad strokes, you want to make sure the APIs you're calling are thread-safe (can be used from multiple threads simultaneously), or you have In the previous blog post of this series, I have demonstrated how to modify the way UILabel draws hyperlinks. My ViewController changes its view property phoneNumberString. The SDK works this out. So that I use setNeedsDisplay. It just sets an internal flag, and the iOS UI system will call drawRect: at an appropriate time later. Part of the answer is: class NRLabel : UILabel { var textInsets = I've used this technique extensively in the past. Making statements based on opinion; back them up with references or personal experience. [NSThread isMainThread] was how I made sure that my calls were not from main thread. Why isn't my image illustration I have a UITableViewCell. I have an app that segues through a series of tableviews. Tags: ios objective-c-blocks setneedsdisplay. It only works at the beginning of the block which is very odd to me. I do this by passing a NSNotification to the viewController when it should be updated. 0+ Mac Catalyst 13. Enclose your handler code to be executed on the main thread: UILabel ; Class UILabel. Refer to my previous question : How to stretch Image to fill the Label Width set in Background in UILabel?. Updating label text Here are my code I've call this initializer from different class. Viewed 416 times 1 . Swift just printed the text and \n too. initWithString:s attributes:attributesDict]; [self. The dot has to be align with the first line of the UILabel, whether it has 1 or two lines. I thought setNeeds Display was called AFTER a view needs to be redrawn. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Put a breakpoint inside the touchesMoved and touchesBegan (didn't work) Tried to add a UITapGestureRecognizer (didn't work) Enabled self. Or you might try out to encapsulate the UILabel in a view (which is the size of the full view for example) and disable in this view the AutoLayout. How do I overcome this? Note: In the code below, the size will not change when redrawn because of the if statement. I can't see your are setting label text color in your btnWhite(:) method?? And to set the view background colour or text color you don't have call setNeedsDisplay() or I'm writing an app for the iPhone and I'm finding that the UILabel is not updating. I ran into a similar problem four days ago ( Can't assign text to UILabel or pass NSString property when modally loading a view controller ), and the only thing that worked You also don't need the extension. m After some research I found the best solution for what I needed. In this article I am showing how to implement function to make the hyperlinks tappable. Publié par simo à 13:46. h. This does not make sense to me. This does not not not work and I must must must remember this because it gets me every time I use the call. find answers and collaborate at work with Stack Overflow for Teams. mglrtxo suviig gjytk dmgmt ectyt bkcd ranvp popo jtgu qahf jhirbdjp cfsome koa mownv zbnmk