NSString* index=@"/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip";
/最后一个“/”之后的部分/
NSLog(@"1=%@",[index lastPathComponent]);
/最后一个“/”之前的部分/
NSLog(@"2=%@",[index stringByDeletingLastPathComponent]);
/最后一个“/”之前的部分的后缀名称/
NSLog(@"3=%@",[index pathExtension]);
/此方法仅仅适用于文件夹路径 不适用于URL 获取主目录/
NSLog(@"4=%@",[index stringByDeletingPathExtension]);
NSLog(@"5=%@",[index stringByAbbreviatingWithTildeInPath]);
NSLog(@"6=%@",[index stringByExpandingTildeInPath]);
NSLog(@"7=%@",[index stringByStandardizingPath]);
NSLog(@"8=%@",[index stringByResolvingSymlinksInPath]);
NSLog(@"9=%@",[[index lastPathComponent] stringByDeletingPathExtension]);
https://www.jianshu.com/p/8f049d61e795 NSString 截取详情
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