core-animation

I have a custom view that has to track the user's location. I put the following code in touchesBegan , as well as in touchesMoved : [UIView animateWithDuration:0.2 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{ cursorView.center = locationOfTouch; } completion:^(BOOL finished){}]; It seems fairly straightforward to me. I'd expect the view to always animate to the user's current location, even if that location is changed and the view is still animating (because of the beginFromCurrentState option). Yet, each animation finishes completely. They don't 'transition' to

The following is code that I use to add a UIButton to a layer via -addSublayer : CAGradientLayer * tile = [[tile alloc] init]; UIButton *XImageButton = [[UIButton alloc]init]; XImageButton.frame= CGRectMake(kXButtonlocX, kXButtonlocY, kXButtonHeight,kXButtonWidth ); [XImageButton setTitle:@"xbutton" forState:UIControlStateNormal]; [XImageButton addTarget:nil action:@selector(XbuttonTouchEvent) forControlEvents:UIControlEventTouchUpInside]; [tile addSublayer:XImageButton.layer]; The XImageButton isn't responding to touch events. How can I fix this so that it does respond? You can't. You'll have

I am working on an iPad app that presents a question to the user in a view. When they answer the question, I would like the view to transition to another view that contains the next question. To make it look all fancy, I am trying to add a curl transition to it but the code I wrote does not work can I can't see to find the problem. It does show the correct view but there is no transition animation. What's with that? Here is the method I use to transition: - (void)pageChangedTo:(NSInteger)page { if ( (page == currentQuestionNumber) || (page > ( [self.allQuestions count] - 1 ) ) || (page < 0) )