I have a UIScrollView with only horizontal scrolling allowed, and I would like to know which direction (left, right) the user scrolls. What I did was to subclass the UIScrollView and override the touchesMoved method: – (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesMoved:touches withEvent:event]; UITouch *touch = [touches anyObject]; float now = [touch locationInView:self].x; float … Read more
I have view with a UITapGestureRecognizer. So when I tap on the view another view appears above this view. This new view has three buttons. When I now press on one of these buttons I don’t get the buttons action, I only get the tap gesture action. So I’m not able to use these buttons … Read more
Getting this error in Swift 2.0. Binary operator ‘|’ cannot be applied to two UIViewAutoresizing operands Here is the code: let view = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 568)) addSubview(view) view.autoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight Any idea what can be the problem? 6 Answers 6
I have a rectangle image (jpg) and want to use it to fill the background of a button with rounded corner in xcode. I wrote the following: UIButton *button = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain]; CGRect frame = CGRectMake(x, y, cardWidth, cardHeight); button.frame = frame; [button setBackgroundImage:backImage forState:UIControlStateNormal]; However, the button I get with that approach doesn’t … Read more
Is there a built-in way to get from a UIView to its UIViewController? I know you can get from UIViewController to its UIView via [self view] but I was wondering if there is a reverse reference? 29 Answers 29
Let’s say we have a view controller with one sub view. the subview takes up the center of the screen with 100 px margins on all sides. We then add a bunch of little stuff to click on inside that subview. We are only using the subview to take advantage of the new frame ( … Read more
I’m looking to perform a perspective transform on a UIView (such as seen in coverflow) Does anyonew know if this is possible? I’ve investigated using CALayer and have run through all the pragmatic programmer Core Animation podcasts, but I’m still no clearer on how to create this kind of transform on an iPhone. Any help, … Read more
What do I need to do to save an image my program has generated (possibly from the camera, possibly not) to the system photo library on the iPhone? 15 Answers 15
I have a UITableView that has two modes. When we switch between the modes I have a different number of sections and cells per section. Ideally, it would do some cool animation when the table grows or shrinks. Here is the code I tried, but it doesn’t do anything: CGContextRef context = UIGraphicsGetCurrentContext(); [UIView beginAnimations:nil … Read more
I am using MKMapView and have added a number of annotation pins to the map about a 5-10 kilometre area. When I run the application my map starts zoomed out to show the whole world, what is the best way to zoom the map so the pins fit the view? EDIT: My initial thinking would … Read more
