After creating a new project and selecting the option to Use SwiftUI, the file opens, but i get an error message in the preview window; 'Cannot preview in this file -- active scheme does not build this file. ' the info button says 'Select a scheme that builds a target which contains ...
我目前正在使用SwiftUI开发一个应用程序。Cannot preview in this file - My.app may have crashed我看不见FirstView.swift和SecondView.swift的预览</e 浏览0提问于2020-09-03得票数 2 回答已采纳 2回答 SwiftUI:如何使用非模拟器支持的框架和PreviewProvider?
我运行的是Catalina 10.15.7和XCode12.3。新的项目->单视图应用程序->提供名称(所有字母,没有中断或标点符号)。项目启动。在不做任何更改的情况下,我单击Resume Preview,并得到一条消息:"Cannot preview in this file: Failed to launch ContentView.swift中的代码是标准的,并在各种视频等中得到确认: import < ...
I can't build even a simple SwiftUI file in my project without running into an error in the Preview pane, which says "Cannot preview this file - not building -Onone".When I tap the little info button, it shows me this message: OptimizationLevelError: not building -Onone"CJDashboard.ap...
I cannot get Kotlin native working with the new SwiftUI preview. SwiftUI works fine in the simulator, but the Xcode preview shows this error: Terminating app due to uncaught exception 'NSGenericException', reason: 'Only one Kotlin framew...
从两方面评价 SwiftUI。库本身和语法 工具集成,实时刷新预览。Swift 语言很适合编写 DSL,另外为了让 ...
• Attempt to preview a SwiftUI view from the watchOS target in Xcode Canvas. Additional Notes: This issue seems to arise only with Canvas previews, as the watchOS app builds and runs successfully on actual devices and simulators. The issue is specific to the Canvas preview environment in Xco...
Sorry you're hitting this error, this sounds like something we'll need more diagnostics to figure out what's going on.Could you please file a bug report and attach your preview diagnostics?Steps to generate helpful diagnostics:Download and install the logging profile on all devices involved. ...
I can see that when building the watch target, only SPM that are included in this target are build for for watchOS The issue is when I try to build a swiftUI preview of the watch target. In this case I can see on the build for Preview log that Xcode try to build ALL spm defined ...
In some cases, your only option to see realm data in a SwiftUI Preview is to create a realm that contains the data. You might do this when populating a property that can only be populated during a write transaction, rather than initialized directly with a value, such as aListorMutableSet...