[英]Searching for a substring in string in Swift not working
我在我的建议数组中匹配了一个子字符串,以创建一个自动完成文本字段。
func searchAutocompleteEntriesWithSubstring(substring: String)
{
autocompleteUrls.removeAll(keepCapacity: false)
for curString in countries
{
let myString:NSString! = curString as NSString
let substringRange :NSRange! = myString.rangeOfString(substring)
if (substringRange.location == 0)
{
autocompleteUrls.append(curString)
}
}
autocompleteTableView.reloadData()
}
但是,如果我要搜索的国家是印度,并且我从“ ndia”开始搜索,那么它没有得到建议,它也应该得到建议。
使用谓词代替:
let countries = ["india", "japan", "Indonesia", "bangladesh", "Australia"];
let predicate = NSPredicate(format: "SELF contains[c] %@", "ndia")
let autocompleteUrls = countries.filter { predicate.evaluateWithObject($0) }
print(autocompleteUrls) // output: ["india"]
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