In this tutorial, we are going to learn about how to get the character index of a string in Swift In swift, we can use the firstIndex(of:) method to get the index position of a character in a given string. In t
letfruitArr: [String] = ["Strawberry","Banana","Orange","Apple"] Here is my cellForRowAt method: overridefunctableView(_tableView:UITableView,cellForRowAtindexPath:IndexPath) ->UITableViewCell{ letcell=UITableViewCell(frame:CGRect(x:0, y:0, width:self.tableView.bounds.width, height:44))...
In typical SwiftRocks fashion, we're going deep into the Swift compiler to answer these and other questions abouthow async/await works internally in Swift. This is not a tutorial on how to use async/await; we're going to take a deep dive into the feature's history and implementation so ...
Sometimes, we may need to merge multiple images into a single PDF file. For example, we scan the front side and the back side of an ID card and want to store them in a single PDF file. In this article, we are going to talk about how to build an iOS app using Swift to merge im...
In the meantime, your only option is to use a Core Data coexistence solution and use NSCoreDataCoreSpotlightDelegate as before to index your data.SAVE 50% All our books and bundles are half price for WWDC25, so you can take your Swift knowledge further without spending big! Get the Swift...
One thing that is critical to understand is that query tuning is an iterative process. You won’t always get it right the first time and data access patterns may change over time. In terms of optimization, the first thing we want to do is get this query using an index and not using ...
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funcmove(fromoldIndex: IndexSet, tonewIndex: Int) { // This guarantees that the edits are performed in the same thread as the CoreData context managedObjectContext.perform { varrevisedItems: [Song] = songs.map({$0}) revisedItems.move(fromOffsets: oldIndex,toOffset: newIndex) ...
Swift renders the syntactic sugar for declaring types optional, so we can replace the Optional<String> with String? There are primarily two ways to obtain wrapped value from the optional container: Optional Chaining: Used in the case where the if-let conditional statement will receive a value on...
Code Block swiftprotocol PodcastViewCellDelegate { func podcastButtonClicked(podcastUrl: String)}In the View Controller, I want to edit element from, added this : Code Block swiftextension DetailViewController: PodcastViewCellDelegate { func podcastButtonClicked(podcastUrl: String) { setupPodcastPlayer...