environmentobject

问题 I have been reading about the property wrappers in SwiftUI and I see that they do a great job, but one thing which I really don't get is the difference between @EnvironmentObject and @ObservedObject . From what I learned so far, I see that @EnvironmentObject is used when we have an object that is needed in various places in our app but we don't need to pass it through all of them. For example if we have hierarchy A -> B -> C -> D and the object is created at A, it is saved in the environment

问题 I have been reading about the property wrappers in SwiftUI and I see that they do a great job, but one thing which I really don't get is the difference between @EnvironmentObject and @ObservedObject . From what I learned so far, I see that @EnvironmentObject is used when we have an object that is needed in various places in our app but we don't need to pass it through all of them. For example if we have hierarchy A -> B -> C -> D and the object is created at A, it is saved in the environment

来源： https://stackoverflow.com/questions/62851218/swiftui-index-out-of-range-when-deleting-cells-with-toggle

来源： https://stackoverflow.com/questions/63004183/how-do-you-make-a-two-way-binding-within-a-class

来源： https://stackoverflow.com/questions/63004183/how-do-you-make-a-two-way-binding-within-a-class

问题 I used this approach to incorporate camera with swiftUI: https://medium.com/@gaspard.rosay/create-a-camera-app-with-swiftui-60876fcb9118 The UIViewControllerRepresentable is implemented by PageFourView class. PageFourView is one of the TabView of the parental View. I have an @EnvironmentObject passed from the SceneDelegate to the parent view and then to PageFourView. But when I am trying to acess @EnvironmentObject from makeUIViewController method of PageFourView I get an error: Fatal error: