替换与其他字符的字符串的字符（唯一那么通配符值） [英] Replace characters (unique then wildcard value) in a string with other characters

问题描述

我有一个NSString，让我们说H，L，K，P我怎么能检测出特定的字符不是那么野生车字符...例如，检查是否有*将返回，L K和P，因为他们都有特定的，然后他们都在他们以后的字符。然后我想用自己加上一个周期追加到它替换字符串。

I have an NSString, let's say "H,L,K,P" how can I detect a specific character than then a wild-car character... for example, checking for ",*" would return ",L" ",K" and ",P" because they all have the specific "," and then they all have a character after them. Then I want to replace that string with itself plus a "period" appended to it.

因此​​，H，L，K，P将变成H，L，K，P。

So "H,L,K,P" would become "H,L.,K.,P."

推荐答案

使用一个普通的前pression。搜索模式将是：

Use a regular expression. The search pattern would be:

,(.)

替换模式将是：

,$1.

样code：

NSString *string = @"H,L,K,P";
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@",(.)"
                                    options:0
                                    error:&error];
NSString *modifiedString = [regex stringByReplacingMatchesInString:string
                                    options:0
                                    range:NSMakeRange(0, [string length])
                                    withTemplate:@",$1."];

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