lastly, the data comes in a dictionary, where the keys are the section headers, and the elements are the section content.This template loads four instruments: View Body, View Properties, Core Animation Commits, and Time Profiler. So, whenever you create a List in SwiftUI, that is how your lists will turn out by. To profile SwiftUI view loading, open the Instruments tool by selecting Profile from the Xcode Product menu and choosing the SwiftUI profiling template. while we use a ScrollView, we still want to have a lazy loading of our UI elements Therefore, we're going to use a LazyVstack. A SwiftUI List looks pretty similar to the Settings page in your iPhone.LazyVStack behaviour is similar with VStack with the exception of lazy.
we will use a ScrollView and our ScrollViewReader (an example with List is given at the end of the article). In the recent WWDC 2020, Apple introduced an LazyVStack which in my opinion is an improved version of VStack due to its advantage in performance.In this article we're going to use ScrollViewReader and DragGesture and implement our SectionIndexTitles:Ī lot is going on in this screen: let's build each component one by one. In Xcode 12 and iOS 14, we've gained ScrollViewReader, which addresses precisely this shortcoming.Īnother missing feature is the possibility to add sectionIndexTitles to Lists: this is the index list (for example, A through Z) placed on the trailing side of a table view, to jump to a specific section quickly. If we want to support both 13 and 14 versions of iOS, and List. JFederico Zanetello SwiftUI launched, one of the missing pieces was the ability to control the offset of ScrollViews programmatically: Move the NavigationView outside the ForEach, otherwise youll have multiple navigation views. When VStack is a freeform StackView that contains random combinations of other views and controls their layout and organization.
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