Use a UIPanGestureRecognizer to rotate view
Is it possible to rotate a view using a UIPanGestureRecognizer? I would like similar functionality to the rotation gesture but with only one finger. Thanks. ...
uiview
Alpha addition in fading UIView and UIImageView
I feel like this ought to be simple, but after searching high and low I can't find an answer to my question. I'm developing page swiping funtionality similar to Mobile Safari, where one page will fade out as it is swiped out of view and the other page fades in. Each "page" is a plain, white UIView with a small UIImageView, displaying a...
improving image view performance
Hi, I'm designing an iPhone app right now that uses a custom UIView that displays a photo and then some quartz drawing over it. Right now, the drawRect function for the view looks like this: [image drawInRect:[self bounds]]; //some quartz drawing code here The problem is that when the image is hi-res, the program lags a...
How can I present a UIView from the bottom of the screen like a UIActionSheet?
I'd like a UIView to slide up from the bottom of the screen (and stay mid-screen) like a UIActionSheet. How can I accomplish this? UPDATE: I am using the following code: TestView* test = [[TestView alloc] initWithNibName:@"TestView" bundle:nil]; [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:0.4]; [UIView setAni...
iPhone SDK, selection Rectangle around a view
I have a Drawing app of sorts and am looking for some feedback on ways to draw a selection rectangle, and or the resize grips for a selected view. So I have a custom class that is inherited from UIView, in it it contains a UIImageView, UILabel, and UIButton. I can have several on the screen at one time. I want to tap on one and draw a ...
Resizing a UIView on iPhone at run-time.
I'm trying to resize my app's view whenever an iAd is scrolled down from the top. The problem is that in run-time, when i set the resized frame size of the relevant view, the resizing doesnt happen 9so the iAd is draw on top of the top 50 vertical pixels). If I set the UIView size at design-time, then I see that the view is resized (whe...
UIView drawRect vs initWithFrame
I have a UIView which has several buttons added to it as subviews. Currently I have the buttons in drawRect:, which I have heard is a bad idea because drawRect can be called several times. I tried to move these UIButtons to initWithFrame, but they just don't get drawn. How should I fix this? I am not using interface builder, so there ar...
How to display a picture on UIView programmatically?
Hi, everyone, I want to ask a question about the UIview on the iPhone applicaiton. I want to display a image one the UIView programmatically, but I don't know how to do it. What should I do to display the image. Thank you very much. ...
Rotate view using CGAfffineTransformRotate
I have a circular image which i am trying to rotate so that the yellow and black striped circle stays under the users finger and rotates in both directions. I have this so far: - (void)handleJogShuttle:(UIPanGestureRecognizer *)recognizer { UIView *shuttle = [recognizer view]; if ([recognizer state] == UIGestureRecognizerState...
UIView touch location coordinates
What are the coordinates used in UIViews and their corresponding superviews? I have this code which i would like to detect a 'corridor' where the user can touch... similar to this image: This is the code i have: CGPoint touch = [recognizer locationInView:[shuttle superview]]; CGPoint centre = shuttle.center; int outerRadiu...
resize multiple uiview in response to in-call status bar change
Using this code I am able to added two uiviews to my window - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { UIViewController* test = [[UIViewController alloc] init]; UILabel* label = [[UILabel alloc] init]; label.frame = CGRectMake(0, 0, 100, 20); label....
FlipFromRight UIView animation
Hello guys! First here's my code: [_helperView addSubview:_navigationController.view]; [_helperView addSubview:itemView]; [UIView beginAnimations:@"pageFlipAnimation" context:nil]; [UIView setAnimationDuration:1.0]; [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:_helperView cache:NO]; [UIView setAnimatio...
Problems with UIView Animation of frame property
Hallo! That's really strange.. i'm changing the frame between two states. In case one, it's animated correctly, in case two (back to original size) only x/y is animated, but width/height instantly changes. Any Idea? Greetz // strange behavior [UIView beginAnimations: @"photobtn" context: nil]; [UIView setAnimationDuration: 0.15...
Creating a transparent UIView behind a subview on iPhone
Question regarding layer two bitmaps on top of each other, one of which is semi-transparent. I have a custom UIView called foo. I have two CGBitmapContext's I have created. They are effectively being used as offscreen buffers and are of equal rectangular dimensions. I want to take the two of these offscreen and layer them one on top of ...
Odd problem with UIView touch handling
Hi, For my iPad app, I'm using a UIViewController subclass called SidebarViewController to display some stuff in a sidebar. In the sidebar I have a calendar control. I'm using the open source Kal component from http://github.com/klazuka/Kal. In the -viewDidLoad method of SidebarViewController, I'm creating a new instance of KalView (the...
How to switch page on iPhone?
HI, everyone, I want to ask a question about the iPhone application. I am writing a program. The program will ask the user the enter some information and press enter, after that the program will process and get some information, then the program will display the tab page with 3 tabs. However, I don't know how to switch the page after t...
Adding scroll bar to a custom ViewGroup ?
I've got the following node in my XML layout: <com.x.y.view.TagLayout android:id="@+id/TagLayout" android:layout_width="fill_parent" android:layout_height="170dip" /> TagLayout is a class that extends ViewGroup, and basically holds a bunch of buttons with text (a custom object that act as tags, but that's neither here or there). The...
Use PanGestureRecognizer translationInView to track touch location
How would i use a PanGestureRecognizer's translationInView which returns a CGPoint, to track the user touch location so that i can rotate an image so that the point where the user touches stays under the finger? I can use CGAffineTransformRotate to do the rotation but it expects a rotation angle in radians. Currently i am using M_PI/20;...
Calculate arc length / central angle of circle using Gesture Recognizers
I need to rotate a circle by an amount equal to the distance travelled by the users finger... This would equate to the length of the arc moved by the finger... I know the radius of the circle, but need to calculate the central angle and maybe the arc length. Can i do this using any functions in PanGestureRecognizer? translationInView? ...
Rotating a UIView programmatically
Should setting an autoresizeMask on a subview and autoresizesSubviews on the superview automatically resize and rotate the view if the return value for shouldAutoRotateTo... is YES? Because its not. I have a scrollView and pageControl on my MainWindow, and the scroll view subviews are loaded from xibs. Consequently, do i need to chang...