我已经搜索过这个问题,但没有找到任何适合我使用最新版本的 Xcode 和 Swift 的解决方案。我使用三个数组:
1. baseArray[Meal]: array filled with every meal. Not locally saved.
2. favoritesArray[Favorite]: with names of all favorite meals, locally saved by the user with NSKeyedArchiver.
3. filteredArray[Meal]: baseArray but filtered for searchterm. In code:
(filteredArray = baseArray.filter { $0.type == searchtext }}
我使用最后一个数组tableView
。如果他们想看到所有餐点,filteredArray
与baseArray
.
我的问题:我怎样才能得到filteredArray
它有所有最喜欢的食物(所以在哪里Meal.title == Favorite.name
)。如何组合三个数组?
上周我尝试了很多选择,但没有一个有效。我希望你能帮助我!
这就是你想要的:
struct Meal {
let title: String
}
struct Favorite {
let name: String
}
let meal1 = Meal(title: "Soup")
let meal2 = Meal(title: "Stew")
let meal3 = Meal(title: "Pizza")
let favorite1 = Favorite(name: "Stew")
let baseArray = [meal1, meal2, meal3]
let favoritesArray = [favorite1]
let favoriteNames = favoritesArray.map { $0.name }
let filteredArray = baseArray.filter { favoriteNames.contains($0.title) }
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