[英]How do I find the last occurrence of a substring in an NSString?
How would I get the last occurrence of an NSString within another NSString? 如何在另一个NSString中获得最后一次出现的NSString? For example, in "abc def ghi abc def ghi," I want to find the index of the second "abc," not the first.
例如,在“abc def ghi abc def ghi”中,我想找到第二个“abc”的索引,而不是第一个。 I know I could do this with a bunch of rangeOfStrings, but is there already a function for that?
我知道我可以用一堆rangeOfStrings做到这一点,但是它已经有了这个功能吗?
使用rangeOfString:options:
,在选项中包括NSBackwardsSearch
。
[@"abc def ghi abc def ghi" rangeOfString:@"abc" options:NSBackwardsSearch];
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