swiftui

问题 I have a ObservableObject that I use to update my UI when new data is sent from the server (an a class which contains an array of custom structs). For some reason, when the data is sent, the ContentView 's body is called, but the data isn't changed. I even added a print statement to check if the data that the array contains is right and it is. When I try to switch to another tab on my TabView , and then switch back to the main view, the UI does get updated. Does anybody know why the UI

问题 I have a ObservableObject that I use to update my UI when new data is sent from the server (an a class which contains an array of custom structs). For some reason, when the data is sent, the ContentView 's body is called, but the data isn't changed. I even added a print statement to check if the data that the array contains is right and it is. When I try to switch to another tab on my TabView , and then switch back to the main view, the UI does get updated. Does anybody know why the UI

问题 I have a ObservableObject that I use to update my UI when new data is sent from the server (an a class which contains an array of custom structs). For some reason, when the data is sent, the ContentView 's body is called, but the data isn't changed. I even added a print statement to check if the data that the array contains is right and it is. When I try to switch to another tab on my TabView , and then switch back to the main view, the UI does get updated. Does anybody know why the UI

问题 I have a ObservableObject that I use to update my UI when new data is sent from the server (an a class which contains an array of custom structs). For some reason, when the data is sent, the ContentView 's body is called, but the data isn't changed. I even added a print statement to check if the data that the array contains is right and it is. When I try to switch to another tab on my TabView , and then switch back to the main view, the UI does get updated. Does anybody know why the UI

问题 The code is let request: NSFetchRequest<NSFetchRequestResult> = Item.fetchRequest() print(request) Item is an entity of Core Data. The first execution is correct, but when execute it again error occurs Thread 12: EXC_BAD_ACCESS (code=1, address=0x0) . The following is logs: This is a similar question, but with Object C. It says that defining managedObjectContext in view controller directly instead of transferring it from AppDelegate can fix the bug. In my code, the managedObjectContext is in

问题 The code is let request: NSFetchRequest<NSFetchRequestResult> = Item.fetchRequest() print(request) Item is an entity of Core Data. The first execution is correct, but when execute it again error occurs Thread 12: EXC_BAD_ACCESS (code=1, address=0x0) . The following is logs: This is a similar question, but with Object C. It says that defining managedObjectContext in view controller directly instead of transferring it from AppDelegate can fix the bug. In my code, the managedObjectContext is in

问题 I'm trying to accomplish the following: struct MultiSegmentPaths: Shape { func path(in rect: CGRect) -> Path { let path1 = UIBezierPath() // apply gradient to path 1 let path2 = UIBezierPath() // apply gradient to path 2 return Path(path1.append(path2).cgPath) } } Now I thought I could wrap each segment with Path , but that returns some View which means I can't append the two together. And applying a gradient directly to UIBezierPath requires having access to context - which isn't passed in

问题 I need to open a view called PackageDetails . There are two cases in which this view could be opened. 1. If you tap a specific Package from a list of packages. I have an array of all the packages. So I'm passing the specific struct from this list and I'm opening this package view. PackageDetail(package: package) . I already have all the data I need so I do not need to make an extra call to Firestore to fetch this document. 2. Package view can be opened by a link from some other view in this

问题 I need to open a view called PackageDetails . There are two cases in which this view could be opened. 1. If you tap a specific Package from a list of packages. I have an array of all the packages. So I'm passing the specific struct from this list and I'm opening this package view. PackageDetail(package: package) . I already have all the data I need so I do not need to make an extra call to Firestore to fetch this document. 2. Package view can be opened by a link from some other view in this

问题 How can I get SwiftUI to load 8 images horizontally but if the third image happens to go off screen it puts it in a Vstack underneath the 1st image with the same padding... and if three can fit on the screen it does the same to the 4th. I can not find anyway to do this! TableViews were so easy to implement but now SwiftUI makes things much harder iPhone: [1] [2] [3] [4] [5] [6] [7] [8] iPad Pro [1] [2][3] [4] [5] [6] [7] [8] iPad Mini [1] [2][3] [4] [5] [6] [7] [8] 回答1: I have acheived this