kean / preheat

Automates prefetching of content in UITableView and UICollectionView

Hi, I'm Alex (short for Alexander).

• Blog: kean.blog
• Built Nuke, Pulse, and other popular frameworks and tools
• Developed the initial CreateAPI version which is now maintained by @cookpad

Contacts

• Mastodon: @[email protected]

preheat's Issues

Requires "to convert to latest swift syntax"

README is outdated

It's not swift 3 or the latest version. I'll see if I can get around to it.

Manual Installation

CocoaPods and Carthage are awesome tools and make our life really easier, but there are some devs who still don't know how to use them.

It would be cool to add the Manual installation guide in your README.md. You can take a look at my iOS Readme Template to see how you can do it.

Could not cast value of type 'FlexiCollectionViewLayout.FlexiCollectionViewLayout' to 'UICollectionViewFlowLayout'

Привет. Я не силен в swift, только начинаю его изучать, прошу помочь.
Я использую кастомный layout (FlexiCollectionViewLayout)

Как следствие, приложение падает при попытке cast типов

Could not cast value of type 'FlexiCollectionViewLayout.FlexiCollectionViewLayout' (0x103ffe070) to 'UICollectionViewFlowLayout' (0x1055a2a48).

Падает вот в этом месте
extension UICollectionView: Preheated {
public var orientation: ScrollOrientation {
switch (collectionViewLayout as! UICollectionViewFlowLayout).scrollDirection {
case .vertical: return .vertical
case .horizontal: return .horizontal
}
}

Падает потому, что я использую FlexiCollectionViewLayout, тогда как Preheared желает получить layout как UICollectionViewFlowLayout

Смысл проблемы понятен, но как исправить, я не понимаю, очень прошу помочь.

Вот кусок кода загрузки контроллера...

override func viewDidLoad() {
super.viewDidLoad()

    preheater = Preheater()
    preheatController = Preheat.Controller(view: self.collectionView!)
    preheatController.handler = { [weak self] addedIndexPaths, removedIndexPaths in
        self?.preheat(added: addedIndexPaths, removed: removedIndexPaths)
    }
    
    let layout = FlexiCollectionViewLayout()
    collectionView?.collectionViewLayout = layout

What is "PreheatControllerDelegate"?

I saw in your example, there is a PreheatControllerDelegate.

After I installed Preheat, cleaned and build, the compiler shows PreheatControllerDelegate is undeclared. (I have import Preheat)

And I can't find the documentation about it, what is it and how to fix this?

Fast scrolling in PreheaterController showing no images even images already downloaded

Hi kean i am using UITableView as PreheaterController, and nuke to download images. Images are approximately 2 MB each. Issue is that after downloading all images if i am scrolling little bit fast (more then normal scrolling by a user) image view not showing respected image. Its working great on normal scrolling. Is it due to preheat method which call nuke to stopPreheatingImages ?

Thanks.

How to use Preheat with swift 2.3

Hello kean thanks for this great library i tested it on swift 3.0 and it is great library great experience.
But i have to integrate this with my project written in swift 2.3 and i tried a lot but failed. Is it possible to use this with swift 2.3?

Thanks

Using Preheat

Hi Alexander,

I'm interested in using Preheat for my project to load very deep view structures before I need them. I was looking at the code a bit, my hesitation is that Preheat may not be tool I'm looking for. Can you speak to its performance for doing that kind of preloading rather than just purely images?

Thanks!
Zack