You may choose to add more if you would like but for now, this is the game plan.
As you can see some of the static data contain some influential people such as Steve Job, Jeff Bezos and so on. Last week, we took a closer look at how UIKit views can be imported into the declarative world of SwiftUI, which both gives us an opportunity to reuse existing UIView -based components, and also acts as an important escape hatch for when SwiftUI does not yet support a given use case. Let’s create a model called People and add some static data. SwiftUI and UIKit interoperability - Part 2. You could have a quick glance of what you will be creating. So you came up with this idea of building an app to recognise all these good people.
To do this, we need to take two steps: Obtain the available horizontal space for each AdaptiveView. There are multiple companies in the world that are making difference and you would like people to notice the good thing that they have done. This way, two or more of these views can layout themselves differently, each based on their own space and threshold. To follow along this tutorial, you’ll need some basic knowledge in: We also have LazyVStack and LazyHStack, which are the same as VStack and HStack, except they avoid rendering off-screen views. When they are off-screen, they are not part of the view hierarchy. In summary, use LazyHStack if you have a huge amount of data and HStack when you have a considerable small amount of data.Ī view that arranges its children in a line that grows horizontally, creating items only as needed. The Lazy prefix in LazyVGrid and LazyHGrid indicates that the views contained in the grid are only rendered when on screen. Just think of it this way, if you have a huge load of data, the ideal way is to load what you see only which is what LazyHStack is doing and as you scroll, you will load the data. On the other hand, HStack is a little opposite with this, it loads everything. Lazy in many instance means if you are not you are not seeing it in your screen, it is not being loaded which in turn increases performances. LazyHStack behaviour is similar with HStack with the exception of lazy. My preference is not to use it because Apple doesn’t use it in the template.In the recent WWDC 2020, Apple introduced an LazyHStack which in my opinion is an improved version of HStack due to its advantage in performance. If you wanted to, you can still prepend line 3 by adding return to the front, but Swift 5.1 doesn’t care if the keyword return is used or not. With opaque types and Swift 5.1, we do not need to specify the return keyword. Please note that I speak about returning a view. You may check out the related API usage on the sidebar. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. These examples are extracted from open source projects.
Lazy vstack how to#
Thankfully, there are types, such as stacks, that allow us to embed other views within the stack and then return the stack as a single view, thus, conforming to the View protocol and satisfying the opaque result type. The following are 5 code examples for showing how to use cvxpy.vstack (). Imagine if our view, ie… the part that the user interacts with on screen, was only able to show one Text field or perhaps one button, then interfaces would be incredibly boring. An opaque result type means that we must return one, and only one, of the specified type, in this case something that conforms to the “View” protocol. This is a new feature added added in Swift 5.1. We will create an app that uses LazyHStack and LazyVStack and observe how it works. Lazy components are loaded just before the item becomes visible on the device's screen during a device scroll, therefore reducing latency.
The word “some” means that we are dealing with an opaque result type. These components are used in a similar way to regular HStack and VStack components but offer the advantage of lazy loading. When you create a SwiftUI view, the protocol defines that we need to return “some View”.