iOS开发中NSURL的基本操作

NSURL *url = [NSURL URLWithString:@"http://www.baidu.com/s?tn=baiduhome_pg&bs=NSRUL&f=8&rsv_bp=1&rsv_spt=1&wd=NSurl&inputT=2709"];  
      
    NSLog(@"Scheme: %@", [url scheme]);  
      
    NSLog(@"Host: %@", [url host]);  
      
    NSLog(@"Port: %@", [url port]);  
      
    NSLog(@"Path: %@", [url path]);  
      
    NSLog(@"Relative path: %@", [url relativePath]);  
      
    NSLog(@"Path components as array: %@", [url pathComponents]);  
      
    NSLog(@"Parameter string: %@", [url parameterString]);  
      
    NSLog(@"Query: %@", [url query]);  
      
    NSLog(@"Fragment: %@", [url fragment]);  
      
    NSLog(@"User: %@", [url user]);  
      
    NSLog(@"Password: %@", [url password]);  

2015-12-10 21:53:57.171 [4697:358837] Scheme: http
2015-12-10 21:53:57.171 [4697:358837] Host: www.baidu.com
2015-12-10 21:53:57.172 [4697:358837] Port: (null)
2015-12-10 21:53:57.172 [4697:358837] Path: /s
2015-12-10 21:53:57.172 [4697:358837] Relative path: /s
2015-12-10 21:53:57.172 [4697:358837] Path components as array: (
    "/",
    s
)
2015-12-10 21:53:57.172 [4697:358837] Parameter string: (null)
2015-12-10 21:53:57.173 [4697:358837] Query: tn=baiduhome_pg&bs=NSRUL&f=8&rsv_bp=1&rsv_spt=1&wd=NSurl&inputT=2709
2015-12-10 21:53:57.173 [4697:358837] Fragment: (null)
2015-12-10 21:53:57.173 [4697:358837] User: (null)
2015-12-10 21:53:57.173 [4697:358837] Password: (null)