将对象 C 转换为 Swift fetchRequest

Question

我在 Objective-C

中有代码

NSFetchRequest *fetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"Doctor"];
[fetchRequest setPredicate:[NSPredicate predicateWithFormat:@"id != nil"]];
fetchRequest.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"distance" ascending:YES], [NSSortDescriptor sortDescriptorWithKey:@"lastname" ascending:YES]];

并尝试转换为 Swift

var fetchRequest: NSFetchRequest = NSFetchRequest(entityName: "Doctor")
fetchRequest.predicate = NSPredicate(format: "id != nil")
let disctanceSortDescriptor = NSSortDescriptor(key:"distance",ascending: true)
let lastNameSortDescriptor = NSSortDescriptor(key:"lastname",ascending: true)
 fetchRequest.sortDescriptors = NSSortDescriptor(key:"distance",ascending: true), NSSortDescriptor(key:"lastname",ascending: true)

如何将 Objective-C 转换为 Swift

fetchRequest.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"distance" ascending:YES], [NSSortDescriptor sortDescriptorWithKey:@"lastname" ascending:YES]];

Answer 1

我想你需要的是这个

fetchRequest.sortDescriptors = [NSSortDescriptor(key: "lastname", ascending:true),NSSortDescriptor(key: "distance", ascending: true)]

希望对您有所帮助！