catransaction

问题 I'm trying to draw a animated circle but every segment needs to have another color. Now everything works except that my piece that is just drawed before I call the method again disappears so only the last part stays. I don't want that, I want that after 4 times a whole circle is drawn in different color strokes. How can I fix this that it doesn't disappears? This is my init code: - (void)_initCircle { _circle = [CAShapeLayer layer]; _radius = 100; // Make a circular shape _circle.path =

问题 I am making an app that fetches JSON content of a blog. The titles of the blog articles are shown in tableView. The titles fetched were HTML encoded. So I decoded them using this code func configureCell(cell: UITableViewCell, atIndexPath indexPath: NSIndexPath) { let object = self.fetchedResultsController.objectAtIndexPath(indexPath) as NSManagedObject var encodedString = object.valueForKey("title")!.description var encodedData = (encodedString as NSString).dataUsingEncoding

问题 I am coding in iOS. I have an NSArray, which contains a few MKMapCameras. I want to display MKMapCameras from the array one after another. I put a while loop and used [self.mapView setCamera:nextCamera animated:YES]; However, this is only showing the first and the last views. Everything in between is going too fast. I want to slow down the movement of each camera. Is there a way to achieve it using CATransaction or using any other animation tricks. If so, could you please show me an example

问题 I'm using GMSMapView . So I added custom GMSMarker and set the image(Ex. Bike image) and animating that marker when user starts moving and changing the angle of the marker in locationManager . Currently I'm just updating position attribute of GMSMarker. But it gives the GMSMarker jump effect. Instead of this I want to move and rotate the GMSMarker smoothly/properly into the GMSMapView. How can i achieve this in Swift? Thanks. (void)updateLocationoordinates(CLLocationCoordinate2D) coordinates

问题 I did a ViewController where there is a button and UITextfield when I click the button a UITableViewController with a UISearchBar is presented and a list of languages is displayed. My issue is when I run the app the first time I click the button and then click the UISearchBar on my console I have this warning SearchDebugApp[2237:558457] +[CATransaction synchronize] called within transaction SearchDebugApp[2237:558457] +[CATransaction synchronize] called within transaction SearchDebugApp[2237

问题 I'm getting this warning in the log window of the debugger: CoreAnimation: warning, deleted thread with uncommitted CATransaction; set CA_DEBUG_TRANSACTIONS=1 in environment to log backtraces. I have to find out what code of mine is calling CATransaction so I can make sure it is running on the main thread. My code doesn't call CATransaction directly. I.e. a search of my code for CATransaction turns up nothing. In Xcode 5, what is the correct way to set CA_DEBUG_TRANSACTIONS=1 in the

问题 I am having issues with the following warning: CoreAnimation: warning, deleted thread with uncommitted CATransaction; set CA_DEBUG_TRANSACTIONS=1 in environment to log backtraces. I am using an NSOperation object to perform some calculations, once complete it sends a message back to the AppDelegate that then hides a progress bar and unhides some buttons. If I comment out the message back to the AppDelegate the warning goes away but the progress bar obviously remains visible and animated. I am

问题 I'm simply closing doors, delaying 2 sec/calling a method then opening them back. One comes from the left side and the other from the right side. I first used UIView animation block but then realized whenever user leaves the app during animation, its completion block would never get called. I could not find anyone complaining about such behavior when interruption happens during animation thus could not solve the problem and now I'm hoping CAAnimation's animationDidStop or CATransaction's

问题 I am getting the following warning with Device only: CoreAnimation: warning, deleted thread with uncommitted CATransaction; created by: 0 QuartzCore 0x3763c65d <redacted> + 220 1 QuartzCore 0x3763c541 <redacted> + 224 2 QuartzCore 0x3763fe2f <redacted> + 30 3 QuartzCore 0x3763b9bf <redacted> + 318 4 QuartzCore 0x3763b87b <redacted> + 50 5 QuartzCore 0x3763b80b <redacted> + 538 6 MyApp 0x000df597 -[CommonClass orangeGradient:] + 382 7 MyApp 0x000f70e1 -[HomeViewController updateStatusBar] +

问题 I am performance testing my iPhone app: // using CATransaction like this goes from 14fps to 19fps [CATransaction begin]; [CATransaction setDisableActions: YES]; // NEG, as coord system is flipped/messed up self.transform = CGAffineTransformMakeRotation(-thetaWheel); [CATransaction commit]; Question: why does disabling core animation's default behavior of interpolating between the old and the new transform matrix give such a performance boost? What could they possibly be doing that could be so