我的风投中有一个清单
var list : [QCategoryy] = [QCategoryy]()
list = NearbyPlaces.getCategories()
list.shuffled()
其中
getCategories()
是函数static func getCategories() -> [QCategoryy] {
let list:[QCategoryy] = [QCategoryy(name: "bar", image: UIImage(named: "bar_button.png")!), QCategoryy(name :"night_club", image: UIImage(named: "nightclub_button.png")!), QCategoryy(name: "movie_theater", image: UIImage(named: "cinema_button.png")!), QCategoryy(name: "restaurant", image: UIImage(named: "restaurant_button.png")!), QCategoryy(name: "gym", image: UIImage(named: "gym_button.png")!), QCategoryy(name: "spa", image: UIImage(named: "spa_button.png")!), QCategoryy(name: "museum", image: UIImage(named: "museum_button.png")!)]
return list
}
我想做的是从此列表中随机抽取一些项目并将其添加到另一个列表,例如
var filteredList = [QCategoryy]()
,我该怎么办?更新
我想在用户点击按钮时这样做
最佳答案
尝试这个。它将过滤列表,并且每个项目都有50%的机会被过滤。
var filteredList = list.filter { _ in
arc4random() % 2 == 0
}
对于改组,请参见this答案。