在传递给的闭包中sort，比较要排序的属性。像这样：
movieArr.sorted { $0.name < $1.name }
或以下要绕过案例的案例：
movieArr.sorted { $0.name.lowercased() < $1.name.lowercased() }
通常，只有类型以大写字母开头；我建议使用nameand date，而不是Nameand Date。
例如，在操场上：
class Movie {
let name: String
var date: Int?
init(_ name: String) {
self.name = name
}
}
var movieA = Movie("A")
var movieB = Movie("B")
var movieC = Movie("C")
let movies = [movieB, movieC, movieA]
let sortedMovies = movies.sorted { $0.name < $1.name }
sortedMovies
sortedMovies 将按顺序 [movieA, movieB, movieC]
Swift5更新
channelsArray = channelsArray.sorted { (channel1, channel2) -> Bool in
let channelName1 = channel1.name
let channelName2 = channel2.name
return (channelName1.localizedCaseInsensitiveCompare(channelName2) == .orderedAscending)
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