Uplift iOS Interview
"Uplift iOS Interview" is a comprehensive guide to help aspiring iOS developers soar to new heights in their careers. This book is an indispensable tool for anyone looking to crack the iOS interview and impress their future employers with their technical prowess. With in-depth coverage of Swift, AutoLayout, SwiftUI, Multithreading, Memory management so on and so forth, this book is a treasure trove of knowledge for anyone looking to uplift their iOS development career.
SwiftUI makes it easy to delete rows from a list using the onDelete()
modifier. In this blog post, we’ll learn how to use the onDelete()
modifier to allow the user to delete items from a list.
To get started, let’s create a simple list of strings that we’ll use as our data source:
@State var data = ["Item 1", "Item 2", "Item 3", "Item 4"]
Next, we’ll create a List
and bind it to our data source using the ForEach
view:
List { ForEach(data, id: \.self) { item in Text(item) } }
This will create a simple list of items that can’t be deleted by the user. To enable deleting, we’ll need to add the onDelete()
modifier to our ForEach
view:
List { ForEach(data, id: \.self, content: { item in Text(item) }).onDelete { (indexSet: IndexSet) in data.remove(atOffsets: indexSet) } }
The onDelete()
modifier takes a closure that is called whenever the user tries to delete an item. The closure receives an IndexSet
that contains the indices of the items being deleted.
To actually delete the items, we’ll need to update our data source and apply the changes to the list. One way to do this is to use the remove(atOffsets:)
method of the MutableCollection
protocol:
// Full code struct ContentView: View { @State var data = ["Item 1", "Item 2", "Item 3", "Item 4"] var body: some View { VStack { List { ForEach(data, id: \.self, content: { item in Text(item) }).onDelete { (indexSet: IndexSet) in data.remove(atOffsets: indexSet) } } } .padding() } }
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Get Ready to Shine: Mastering the iOS Interview
- Uplift iOS Interview - A Comprehensive Guide to iOS Interview
- Xcode Cheat Sheet for Swift
- Xcode Cheat Sheet for SwiftUI
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