Objective-C / cocoa相当于Python的os.path.split（）来获取目录名和文件名

Question

当我有一个路径时，我可以在Python中使用os.path.split（）来获取目录名和文件名。

>>> x = '/a/b/c/hello.txt'
>>> import os.path
>>> os.path.split(x)
('/a/b/c', 'hello.txt')

Objective-C / cocoa中的等效功能是什么？

Answer 1

NSString *a = @"/a/b/c/hello.txt";
NSArray *path = [a pathComponents];
NSArray *startOfPath = [path subarrayWithRange:NSMakeRange(0, [path count]-2)];
[NSString pathWithComponents:startOfPath]; // /a/b/c
[a lastPathComponent]; // hello.txt

Answer 2

有一种更简单的方法（好吧，比乱搞子阵列）;查看NSPathUtilities.h。

- (NSString *)lastPathComponent;
- (NSString *)stringByDeletingLastPathComponent;
- (NSString *)stringByAppendingPathComponent:(NSString *)str;

- (NSString *)pathExtension;
- (NSString *)stringByDeletingPathExtension;
- (NSString *)stringByAppendingPathExtension:(NSString *)str;

- (NSArray *)stringsByAppendingPaths:(NSArray *)paths;

使用“/a/b/c/hello.txt”示例：

 NSString *path = @"/a/b/c/hello.txt";

 NSString *fileName = [path lastPathComponent];
  // 'hello.txt'

 NSString *basePath = [path stringByDeletingLastPathComponent];
  // '/a/b/c'

 NSString *newPath = [basePath stringByAppendingPathComponent:@"goodbye.txt"];
  // '/a/b/c/goodbye.txt'

等等......

Answer 3

NSString有 - (NSArray *)pathComponents。