URL URN URI

今天在做项目的时候突然遇到了NSURLComponents,发现以前没有用到过,就想简单的查一下,后来就发现了更多的东西,这是我看资料和一些自己简单的理解.

DFE54082-9054-48FC-AD66-AC8DF3E7F8C7.png

维基百科:URI可以分为URL,URN或同时具备locators 和names特性的一个东西。URN作用就好像一个人的名字，URL就像一个人的地址。换句话说：URN确定了东西的身份，URL提供了找到它的方式。

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]);  

分隔

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)