NSURL absolute elativeToURL

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http://142.21.79.210/init/init

NSLog(@"%@",path);

NSLog(@"%@",[[NSURL URLWithString:path] absoluteString]);

NSLog(@"%@",[NSURL URLWithString:path relativeToURL:[NSURL URLWithString:_baseUrl]]);

NSLog(@"%@",[[NSURL URLWithString:path relativeToURL:[NSURL URLWithString:_baseUrl]] absoluteString]);

输出全部为：http://142.21.79.210/init/init

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NSURL *baseURL1 = [NSURL URLWithString:@"https://api.service.com/v1/"];

NSURL *baseURL2 = [NSURL URLWithString:@"https://api.service.com/v1"];

NSURL *baseURL3 = [NSURL URLWithString:@"/v1" relativeToURL:[NSURL URLWithString:@"https://api.service.com"]];

NSURL *relativeURL1 = [NSURL URLWithString:@"/files/search" relativeToURL:baseURL1];

NSURL *relativeURL2 = [NSURL URLWithString:@"/files/search" relativeToURL:baseURL2];

NSURL *relativeURL3 = [NSURL URLWithString:@"/files/search" relativeToURL:baseURL3];

NSURL *relativeURL4 = [NSURL URLWithString:@"files/search" relativeToURL:baseURL1];

NSURL *relativeURL5 = [NSURL URLWithString:@"files/search" relativeToURL:baseURL2];

NSURL *relativeURL6 = [NSURL URLWithString:@"files/search" relativeToURL:baseURL3];

NSLog(@"1: %@", [relativeURL1 absoluteString]);

NSLog(@"2: %@", [relativeURL2 absoluteString]);

NSLog(@"3: %@", [relativeURL3 absoluteString]);

NSLog(@"4: %@", [relativeURL4 absoluteString]);

NSLog(@"5: %@", [relativeURL5 absoluteString]);

NSLog(@"6: %@", [relativeURL6 absoluteString]);

And this is the output:

1: https://api.service.com/files/search

2: https://api.service.com/files/search

3: https://api.service.com/files/search

4: https://api.service.com/v1/files/search

5: https://api.service.com/files/search

6: https://api.service.com/files/search

Firstly, the string /files/search is an absolute path since it starts with a slash. Resolving it against any existing URL will ignore the existing path.

Secondly, https://api.service.com/v1 does not have a trailing slash to indicate it's a directory. Any strings resolved against it will always ignore the v1 portion.

To conclude, you need that combo of a relative path — files/search — and directory base URL — https://api.service.com/v1/.