Question

我需要在Objective-C中解析NSString ..即如果输入路径字符串是/ a / b / c / d，我需要解析路径字符串以获得out / like / a / b /
我如何实现它？输入路径字符串：/ a / b / c / d 预期输出路径字符串：/ a / b / 请帮帮我。

谢谢。粟色。

Answer 1

您可以使用stringByDeletingLastPathComponent两次：

NSString *pathStr = @"/a/b/c/d";
NSString *path = [[pathStr stringByDeletingLastPathComponent] stringByDeletingLastPathComponent];
NSLog(@"%@", path);

返回/a/b。

Answer 2

怎么样：

NSString *path = @"/a/b/c/d";
NSArray *components = [path pathComponents]

NSLog(@"%@", [components objectAtIndex: 1]); // <- output a
NSLog(@"%@", [components objectAtIndex: 2]); // <- output b
NSLog(@"%@", [components lastObject]); // <- output d

Answer 3

NSString *path = @"/a/b/c/d";


int howManyFoldersNeedsToBeDeleded = 2;

for (int i = 1; i <= howManyFoldersNeedsToBeDeleded; i++) {


     path = [path stringByDeletingLastPathComponent];




}



NSLog(@"output : %@ \n\n",path);

如何通过删除Objective-C中的路径中的2个文件夹来解析NSString

3 个答案: