ios - 过滤和排序 swift 数组

Question

我有一个要过滤的 swift 数组，这是数组

let array = [apple,workshops,shopping,sports,parties,pantry,pen] 

我想以这样的方式过滤数组，使以搜索字符串开头的项目出现在仅包含搜索字符串的项目之前

所以当我搜索示例 p 时，结果应该是这样的

let array = [parties,pantry,pen,apple,workshops,shopping,sports] 

我试过了

tagSearchResults = tagSearchResults.filter({ (interestTag:InterestTag) -> Bool in
            let tmp: NSString = interestTag.tag
            let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
            return range.location != NSNotFound
        })

但这给了我所有包含搜索字符串的字符串。

伙计们，我该怎么做

Answer 1

你可以写

 let result = words
    .filter { $0.contains(keyword) }
    .sorted { ($0.hasPrefix(keyword) ? 0 : 1) < ($1.hasPrefix(keyword) ? 0 : 1) }

例子

let words = ["apple", "workshops", "shopping", "sports", "parties", "pantry", "pen", "cat", "house"]
let keyword = "p"
let result = words
    .filter { $0.contains(keyword) }
    .sorted { ($0.hasPrefix(keyword) ? 0 : 1) < ($1.hasPrefix(keyword) ? 0 : 1) }

// ["pen", "pantry", "parties", "apple", "workshops", "shopping", "sports"]