从一个字符串中得到末尾字符串

从/Application/Mobile/Lib/123.abc中获取123.abc。123.abc的长度不是固定的。

应该怎么做？

NSString *fileName=[str lastPathComponent];

使用NSString的lastPathComponent方法

NSString *myString = @"/Application/Mobile/Lib/123.abc";
NSString *lastPath = [myString lastPathComponent];
//lastPath would be equal to 123.abc (or whatever the last path component is.