uiscrollview

问题 So I have a main view that is a UIScrollView, and I add all of my elements (UIButtons, UITextFields, UILabels etc. etc.) to it. The problem I am having, is that when I go to tap a button, the button will perform the action(s) that it is supposed to, however I will not see the pressed animation occur. I can only see the animation if I press and hold for about half a second. I believe this has something to do with the fact that the UIScrollView seems to think I am trying to scroll at first, but

问题 I'm looking to recreate the functionality that's show in this video for the picture: https://www.youtube.com/watch?v=zEREoIcoQHE A long press is done, a view appears, and when the user swipes up far enough, the options come up at the bottom. If the user continues to drag up higher and then lets go, the main view animates to bounce back down to the middle of the screen. If the user swipes all the way down, the view animates away. I recognize there is a lot going on here and a lot of different

问题 So i have a UIScrollView with UIPageControl which has a bunch of MKMapViews (mostly 15 different maps). The app is really sluggish once this view loads and after a few minutes of usage i get a memory warning. I looked at it in Instruments and the maps take an insanely high chunk of memory. Even upto ~200mb sometimes. One thing i can think of is to reuse the mapViews. But because of how the views are structured the coding complexity increases. Any suggestions how i can improve performance?

问题 I'm hitting a problem getting a UIScrollView to update correctly in response to a change in the minimum zoom scale. The scrollview has a UIImageView as a subview, and the image property of the UIImageView is set in response to the didFinishPickingMediaWithInfo method of UIPickerView: - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { UIImage *takenImage = [info objectForKey:UIImagePickerControllerOriginalImage]; [self.imageView

问题 I have a view with a bunch of button in a UIScrollView . When the user presses a button, I want a UIPopOverController to display pointing at the selected button. It kind of works, but the popover is the wrong size and points to a random point in the view. Here is my code. -(void)detail:(id)sender{ UIButton *button = sender; NSLog(@"tag = %i", button.tag); UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController]; if (UI_USER_INTERFACE

问题 I have a view with a bunch of button in a UIScrollView . When the user presses a button, I want a UIPopOverController to display pointing at the selected button. It kind of works, but the popover is the wrong size and points to a random point in the view. Here is my code. -(void)detail:(id)sender{ UIButton *button = sender; NSLog(@"tag = %i", button.tag); UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController]; if (UI_USER_INTERFACE

问题 In my iOS app I am observing changes to the contentOffset property of my scrollView subclass. My observer handler looks like this: - (void)observeContentOffsetHandler:(id)aContentOffset { NSLog(@"%@", aContentOffset); } I chose the parameter to the method arbitrarily as an id for simplicity. My NSLog'ging looks like this: -[MyScrollView observeContentOffsetHandler:] [Line 111] NSPoint: {296, 375} -[MyScrollView observeContentOffsetHandler:] [Line 111] NSPoint: {296, 389} -[MyScrollView

问题 Has anyone managed to get a UIGestureRecognizer to work on a UIView that is a subview of a UIScrollView? My callbacks never seems to get called. As a simple example, I want to have a paging scrollview and on the third page listen for a tap with a UITapGestureRecognizer. However I can not get it to work. Here's how I would do it: self.scrollView = [[[UIScrollView alloc] initWithFrame:self.view.frame] autorelease]; self.scrollView.pagingEnabled = YES; self.scrollView.contentSize = CGSizeMake

问题 Right now I'm populating a UIScrollView with a series of views. The views need to be warped to make the UIScrollView appear like a carousel. In other words when the user scrolls it needs to be like a circle. I've never done anything quite like this before, but I'm assuming CoreAnimation is out of the question and OpenGL needs to be used. If this is possible with CoreAnimation or Quartz then I really just need a sample on how to warp the views and I can figure the rest out myself but I'm not

问题 I am trying to make practice app where i can scroll images with page control. I am able to scroll images and able to include the page control. But the problem i face is i am not able to interlink the two. Meaning to say when I scroll the images, the page control is not affected and when i change the page control, the scrolling of the images is unaffected. I am referring to this website: http://www.raywenderlich.com/10518/how-to-use-uiscrollview-to-scroll-and-zoom-content ViewController.h