I have a UIScrollView which has a bunch of UIButtons as children.
If I click outside of these buttons, I am able to scroll the UIScrollView. However, if I try to scroll by clicking on one of these buttons, the scrollview doesn't work.
Each button is registered to listen to UIControlEventTouchUpInside.
Any ideas?
If you're touching the button and hoping to scroll, then you should be linking to the UIControlEventTouchDownInside event, not outside!
Additionally, you have to pass the touch event to the underlying UIScrollView to make the scrolling happen. The app is actually trying to do you a favor by letting you click the button and not scrolling the table.
Good luck
Related
I made UIPicker and with background on it:
(left is normal size of Picker, on the right is mine)
The problem is: when the user clicks on TextField - the picker reacts and scrolls down. Is it possible to prevent clicking, and make it to react only on swipe?
Add an another UIView above all view then add your UITextField on this UIView.
This will prevent the user interaction conflict.
I think you should move your UITextField farther away from the UIPickerView. Maybe a few notches up as the users touch would cover both the views.
I have a "side panel" like widget in my app that can be swiped in from the side of the screen. In order to help the users find the panel, I also added a UIButton to do the same thing - scroll the panel on and off screen.
The view comes from a different view controller, otherwise I would've simply created an extra panel in the interface builder and positioned it properly.
My problem is that the side panel gets positioned over the button, so if it is displayed with a button, it can only be dismissed with a gesture.
is it possible to specify at which "depth" I add a UIView when I programmatically add it in code?
This is the snipped that slides the panel in or out within the animation block.
self.audioSystemController.view.frame =CGRectMake(0,20, 120,460);
I need the UIView to be shown below a UIButton, so the button may be used to dismiss the view. I know this is redundant, but I cannot depend on the users to simply discover the side swiping gestures :/
Thank you for your help!
Check out the insertSubview:belowSubview: method of UIView.
I have a view that holds some UIButtons. Another view covers and hides the buttons. When the top view slides off to reveal the buttons (with an animation).. the UI draws the buttons grayed out until the top view no longer covers or overlaps the buttons at all.. causing an undesirable flicker from gray to the normal button color (white).
is there a way to keep the UIButton from rendering itself disabled while covered or semi covered by another view?
I dont think that its correct that a button is disabled while covered. What is happening is that when its covered, touch events are prevented from getting to the button, so the button cant get pressed. If the button is only partially covered, touch events to that part that are not covered can be received by the button and the button can be depressed. If you really wanted the button to work while it was covered (maybe you can relayer your views so the button is in front of the view instead of behind it?) you could hack your view and void its hit testing so it doesnt capture the touches.
Well, in lieu of actually finding the correct answer, I simply swapped out the buttons with UIImageViews and attached UITapGestureRecognizers to them... this solved the problem.
I placed a uibutton inside of a tablecell. When i try to scroll up and down through the table, the table does not scroll if i place my finger on the button and scroll from there. How do I pass the scroll event up the responder chain so that the tableview can handle the scrolling?
This is very deliberate behavior in the frameworks. UIScrollView explicitly avoids taking over touch events that begin on a button. Is there any particular reason you want this to happen?
I want something similar to how the iPhone homescreen works. I have my scrollview inside my main view, which scrolls to the right, but when you touch on the UIButtons, they become highlighted and dragging means they don't end up getting pressed but also the scrollview doesn't end up scrolling. It doesn't do this on the homescreen. How can i make it similar to this?
A touch-down-drag is a completely different event. Apple doesn't support this directly—you'd have to code it in—start tracking the touches using the gesture responders as soon as a touch-down-inside is detected, then scroll the same amount, and stop scrolling at a touch-up-outside (or inside). This would most likely fall under the category of unusual use of interface elements, and could very well get you rejected.
I think this is a better answer to the question:
UIScrollview with UIButtons - how to recreate springboard?