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It’s hard to overstate how much of a game-changer Xcode Previews are for iOS development,Īnd we couldn’t be happier to incorporate them into our workflow. These inline previews serve as living documentationįinally get a handle on their design system. We not only get (literally) hours more time each week,īut we unlock the possibility of maintaining an unbroken flow state during that time.įundamentally changes the calculus for testing: It enables with Xcode 11 on macOS Catalina.īy eliminating so much time spent waiting for things to happen, We can all immediately benefit from the order-of-magnitude improvement There’s currently no way to get SwiftUI device previews in landscape orientation.Īlthough you can approximate this with a fixed size preview layout,īe aware that it won’t respect Safe Area on iPhoneĪlthough most of us are still some years away from shipping SwiftUI in our apps That draws a border around itself: final class Bordered Button : UIButton #endif
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Without changing a line of code in our UIKit apps. To radically speed up and improve our development process. We can start using its capabilities today Your code either won’t compile or won’t render live previews.Īlthough many of us have taken a “wait and see” approach to SwiftUI, (In Xcode, navigate your project’s Build Settings Įxpand the iOS Deployment Target setting and set Debug to iOS 13.0 or later)
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The next sprint Shlemiel only gets 5 screens done. “you’re a fast worker!” and pays him a Bitcoin.
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Shlemiel gets a job as a software developer,Īnd implements 10 new screens of the app. (provided below with a few -specific modifications
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There’s an old Yiddish joke about Shlemiel the painter The stop-and-go nature of app development, Just to see whether the Auto Layout constraint you just addedīut for those of us who don’t so much relish in Into a particular state and onto a particular screen, You spend even more time getting your app
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Waiting for the Simulator to boot and your app to launch… Waiting for Swift and Objective-C code to compile, let image // your image let targetSize CGSize(width: 100, height: 100) let scaledImage image. Working on a large iOS codebase often involves a lot of waiting: That’s it You now have an extension that will resize any UIImage to a target size without stretching or distorting the original image.
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