I'm trying to create a scroll view like the one used in the airbnb app.
At start the view display the image and under the image there is many subviews with info.
when scrolling the image start to shrink in a parallax way till it's gone.
Any ideas how to implement it ? I prefer to understand how it's done rater then using some github control
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I am trying to build an iOS app that will have the structure of Facebook's feed:
A vertical collection view that will have cells. Each cell will consist of image and text.
In fact, I am building my app with the help of this video by LetsBuildThatApp (this guy rocks by the way).
Currently, I am able to touch the image and animate it to full width, and also pan to dismiss it if velocity on Y-axis is more than a specific threshold.
What I want to achieve after that is to also be able to pinch/double tap to zoom. Like this:
I searched around and found some great articles on how to use UISCrollView to zoom. [Article1, Article2].
The problem is that I use autolayout to perform animations but these articles either use Storyboards or frames to position the image in the center of the scroll view [or at least this is how I understand it]. And also they don't involve any animations to start with.
Also, I don't want to present or push a view controller onto the navigation controller stack. I would rather animate the view on top of the base view as I do now.
Any idea on how to achieve this?
Thank you in advance!
I am looking to achieve a similar effect to the Netflix app where at the top they have a scrollable header displaying different 'featured' movies.
As soon as the header start to scroll and the next image enters the view it downloads the image, also while being scrolled if you let go it snaps into place the image that was currently being shown the most.
I am not sure how to proceed and try to solve this problem. Any suggestions? should I look at using UIPageControl, or should I use a horizontal UICollectionView?
Thanks
You can implement it by using a horizon collection view，it can help you handle the reuse of imageViews!Or you can use a UIScrollView to contain a couple of subViews to display the image or three subViews and switch the image content
I am looking to create a simple parallax scrolling effect on an image view that is embedded in a UIScrollView in swift (actually, I have the image embedded in a view that is, in turn, embedded in the UIScrollview). This is the layout I am working with:
As you can see from the screenshot above, the image is larger than the UIImageView to which it is assigned. When the user scrolls down the screen I would like other (vertical) portions of the image to become visible, such as in the example given in this tutorial. The tutorial, however, uses a collection view to display a mutable array of images and I could not figure out how to adapt it to my purposes. Does anyone have an idea as to how to accomplish this?
I have created a small app using a ScrollView w/ paging and a series of UIImageViews each representing a page. It acts similar to the Photos.app.
I want to be able to pan and zoom individually for each image (page of a scrollview).
What would be the most sound approach to do this? Should I replace the UIImageView page with a scrollview with a UIImage inside it? I would then have a main scroll view where each page of the scrollview had a scrollview with an image inside it that could be pinched,etc.
It seems like a messy approach. I am looking for a clean approach. Any suggestions?
Well, as far as I know the approach you suggest is the way it is done. I have used this to create a PDF viewer and once everything is in place it doesn't feel too messy.
You might want to use CATiledLayer as your inner (per-page) scrollview's layer (instead of CALayer) if these images you have are really big (which could well be the case since otherwise zooming in on them would not bring you much but pixelation, but this is just an assumption on my part).
Checkout UIPageViewController. This controller manages a view controllers for each page and transitions between them using effects like page curl or scroll.
In your case you would create a view controller that manages a scrollview for zoom & pan for each page.
I have a simple app that has a set of coloured views, one red, one green and one blue.
I am trying to make it so that when a swipe gesture is made the current view will switch to the next one in the list in a fluid manner, it looks like moving a long piece of paper with different colours on it.
Is there a way to do this (CoreAnimation)?
You could first look into UIScrollView. It seems to me that what you are trying to accomplish is the same you have, say, in Mobile Safari on an iPhone, when you show all your current pages and can go from one to the next by scrolling. This tutorial is particularly close to what you describe.
If you are looking into more advanced kind of transformations, than Core Animation would be the option.
Actually, nothing prevents using both approaches, UIScrollView to handle the swipe, Core Animation to add more animation to the pack...
You could use a UIScrollView to accomplish this. Add all of your colored views as subviews to the scroll view. Make sure your contentSize is setup appropriately and optionally setup paging to make the scrolling always snap to a certain border. See the scroll view programming guide for more info Scroll View Programming Guide