iOS predicate for searching each word in a string of an array

Question

I have an array and I want to implement autocomplete with it. The autocomplete should work in such a way that for eg:

I am searching a string pi

It should return the string big pizza as pi is the start of the 2nd word. I have implemented :

    NSPredicate *pred = [NSPredicate predicateWithFormat:@"stationName CONTAINS[cd] %@", substring];

This is returning me all strings which have the string as a part of it. I want string which have the string present at the start of any word.

Answer 1

您需要使用MATCHES运算符（使用ICU的正则表达式 ）来匹配对所有规则进行编码的表达式。