I'm trying to implement a grid view menu, with horizontal background scroll of three images triggered by swipe gesture, so only the background images are scrolled while icons remain still. I investigated AQGridView, GMGridView, OHGridView, but they seem to not include this feature, so I decided to implement my own grid view with custom buttons placed in grid formation. My doubts are how to implement the background image scroll. I have searched for different solutions, but I'm not able to figure out how to solve it.
Many thanks
If I understand your question correctly you could make a view with 2 subviews: a) the grid of icons (UIImageView) and b) a scroll view with your background images in paging mode (UIScrollViewController).
Just make sure your icons do not receive touches, so that the scrollview gets the touches.
If you want to make the icons tap-able, then it's a little more complicated; you could create an invisible layer on top and then manually handle the touches, which will get complicated. Or, what I would do, place the icons as subviews on the plain scrollview, and then move the icons in the equal and opposite direction that the scrollview is moving in to create the illusion that the icons are standing still, this will simplest to implement but is a bit of a hack. Mathematically speaking you want to apply a transformation to the scrollview and apply the opposite transformation to the icons which are in the scrollview's coordinate system so that in the global coordinate system (the screen) your icons do not move.
Related
Is it possible to have a curved scrollbar like on WearableRecyclerView on ScrollView? How is it done?
Here is a reference to get you started.
To create a curved layout for scrollable items in your wearable app:
Use WearableRecyclerView as your main container in the relevant XML layout.
Set the setEdgeItemsCenteringEnabled(boolean) method to true. This will align the first and last items on the list vertically
centered on the screen.
Use the WearableRecyclerView.setLayoutManager() method to set layout of the items on the screen.
If you explore the document, you will be able to get in touch with the code snippet for customization of the scrolling.
For Circular Scrolling Gesture:
By default, circular scrolling is disabled in the
WearableRecyclerView. If you want to enable a circular
scrolling gesture in your child view, use the WearableRecyclerView’s
setCircularScrollingGestureEnabled() method.
I am trying to understand how can I set a threshold for the RN ScrollView.
This is because if you have multiple vertical scrollable View in a horizontal ScrollView then the scrolling of the Views is very difficult.
So i just need something that holds the horizontal scrolling until the finger swipe horizontally for a certain pixel-span.
Has anyone a clue about how to archive this?
You can use the native scroll event in onScrollEnd to get the velocity of the scroll, then only scroll horizontally if it's past a certain amount. On most vertical/horizontal scrolls, most users only scroll in one direction. If you truly want to implement a distance based scroll, you would need to attach a PanResponder to your component and compare the distnaces of the Grant and Release events.
How can I implement swipe to see more options? There are lot of libraries that I could readily use, but they all are designed for iPhone apps. In iPad you have a lot of space, and I want to stack the buttons vertically instead of horizontally.
Is there any library for this? If not, how should I go about building this as a custom cell?
I tried building a custom UITableViewCell class which adds a UIScrollView, but it's not the same as showing the buttons beneath the cell.
Based on your inputs I have created a simple custom cell with basic functionality of swipe to see utility buttons and of course buttons stacked vertically.
What I did was, add a UIView beneath the cell's content view and positioned at right. Now depending on the number of buttons provided each button's height is adjusted accordingly. And delegates are provided for button clicks.
Swipe gestures are added. On swiping left it will animate and shift the cell's content view to reveal the button view. On swiping right it will reset the cell to original position.
You can customise it from here onwards as you wish :)
I have uploaded them over here : https://github.com/srikanth-vm/GSSwipeableCell
I am trying to create the same type of slide-up/pull-up menu (from the bottom) as the Any.do iPhone app, but not having any success.
The issue I am running into is the app was built with storyboards so I am thinking I might have to scratch that idea and use just code.
Any ideas?
There is no need to get rid of your storyboard to recreate this, that's what IBOutlets are for. Any way, it looks like this was made by creating a UIScrollView that takes up the entire screen. Then add a UITableView to the upper section of the scroll view. Mind you in order for this to work, you'll need to disable scrolling on the scroll view in the background.
From there you can programmatically add the other elements to the scroll view to be rendered off screen, since there are only three they can probably just be buttons. And finally, since scrolling is disabled on the background scroll view you can add an image with a UISwipeGestureRecognizer at the bottom of the screen to manually change the scroll view's content offset property.
In my app I use a page control and a UIScrollView to page horizontally, I'd like to be able to enable vertical scrolling on each page. Now I know you can nest UIScrollViews in order to achieve this, there is however one problem in my project. Each of the pages uses a view controller consisting of a view, with a background image (different image for each page). This background image should not move while scrolling up and down.
Now what I want is the ability to have buttons, regular rect buttons, which I create in Interface Builder (since I want to be able to design and update the positions easily) and which then can be scrolled vertically.
So it should be like this:
You see a screen with a page-control on the bottom, above it an image with buttons over it. When you scroll sideways, you go to another page, again with an image (another one) and with different buttons. Now whenever you scroll vertically on a page, the buttons should be scrollable (so I can have a LOT of buttons on 1 page), but the image should maintain it's position.
So I figured, I just add another scroll view on top of the view with the background image. This works fine since I now have my buttons hovering over the background image and I have a separate nib file for each page including the buttons. But when I do it like this, the scrollview with the buttons becomes un-scrollable vertically. I don't know why this is happening, so could anyone suggest me how to achieve the wanted result?
I'd be really really grateful!
Thanks,
Fabian