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SwiftUI Dynamically Filtering FetchRequest
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| struct DynamicFetchRequestView<T: NSManagedObject, Content: View>: View { | |
| // That will store our fetch request, so that we can loop over it inside the body. | |
| // However, we don’t create the fetch request here, because we still don’t know what we’re searching for. | |
| // Instead, we’re going to create custom initializer(s) that accepts filtering information to set the fetchRequest property. | |
| @FetchRequest var fetchRequest: FetchedResults<T> | |
| // this is our content closure; we'll call this once the fetch results is available | |
| let content: (FetchedResults<T>) -> Content | |
| var body: some View { | |
| self.content(fetchRequest) | |
| } | |
| // This is a generic initializer that allow to provide all filtering information | |
| init( withPredicate predicate: NSPredicate, andSortDescriptor sortDescriptors: [NSSortDescriptor] = [], @ViewBuilder content: @escaping (FetchedResults<T>) -> Content) { | |
| _fetchRequest = FetchRequest<T>(sortDescriptors: sortDescriptors, predicate: predicate) | |
| self.content = content | |
| } | |
| // This initializer allows to provide a complete custom NSFetchRequest | |
| init( withFetchRequest request:NSFetchRequest<T>, @ViewBuilder content: @escaping (FetchedResults<T>) -> Content) { | |
| _fetchRequest = FetchRequest<T>(fetchRequest: request) | |
| self.content = content | |
| } | |
| } |
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Dynamically Filtering FetchRequest
Refers to the article here