uicollectionview

问题 I'm using UICollectionView to create a gallery app for iOS. I'd like for users to be able to drag and drop images to reorder the gallery and to create folders (similar to the home screen on the iPhone). I found the following tutorial to implement drag and drop reordering. However, I'm having an trouble figuring out where to start on the folder creation. What I'd like to do is implement the following scenarios: When an image is dragged around, it does not automatically reorder other images in

问题 I'm using UICollectionView to create a gallery app for iOS. I'd like for users to be able to drag and drop images to reorder the gallery and to create folders (similar to the home screen on the iPhone). I found the following tutorial to implement drag and drop reordering. However, I'm having an trouble figuring out where to start on the folder creation. What I'd like to do is implement the following scenarios: When an image is dragged around, it does not automatically reorder other images in

问题 I'm using UICollectionView to create a gallery app for iOS. I'd like for users to be able to drag and drop images to reorder the gallery and to create folders (similar to the home screen on the iPhone). I found the following tutorial to implement drag and drop reordering. However, I'm having an trouble figuring out where to start on the folder creation. What I'd like to do is implement the following scenarios: When an image is dragged around, it does not automatically reorder other images in

问题 I am using UICollectionViewDiffableDataSource for UICollectionView to display content in multiple sections. I am using Collection View Compositional Layout and Diffable Datasources link which was introduced at WWDC'19 to render the Multiple Section Layout of UICollectionView I have a simple setup, The Header for each section shows number of items in that section, and Footer shows the summary of all items of the section. section 1 Header --> January 2020 - 5 Trips section 1 item 1 --> Trip 1

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use

问题 I'm trying to implement a feature where by a user drags and drops one collectionview cell onto another. However, I want to change the preview of the thing in motion completely, as to match the visual metaphor of my app (the item isn't moving, something the item contains is moving). For example, say my collectionview cell shows a pen of pigs, and I want to to let the pig move from one pen to another, the preview view should be a view showing a single, not the pen. Its a slightly different use