IOS开发中NSURL的基本操作及用法详解

ps：NSURL的用法

1:NSURL初始化方法:

NSURL *url=[NSURL URLWithString:@"http://www.easck.com/pre>
	
	

		2:解决NSURL初始化失败的方法.
	

		将传进来的NSString 进行 UTF8 转码即可.
	
		

NSString *strLocalHtml = @"file:///Users/amarishuyi/Desktop/My IPhone Life/WebDeveloper/WebPlug-in/ExtEditor/DataPage/KMQT/Ext-HTMLEditor.html"; 
strLocalHtml = [NSString stringWithFormat:@"%@?Value=%@",strLocalHtml,self.txtUrl.text]; 
strLocalHtml= [strLocalHtml stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 
NSURL * url=[NSURL URLWithString:strLocalHtml]; 

	
	

		3:NSURL 成功初始化后可以获取的参数 (摘自:NSURL 学习 )
	
		

NSURL *url = [NSURL URLWithString: @"http://www.easck.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]); 

	
	

		结果如下:
	
		

2012-03-31 18:22:20.904 SmallDemoList[5473:11603] 12131232 
2012-03-31 18:22:20.907 SmallDemoList[5473:11603] Scheme: http 
2012-03-31 18:22:20.907 SmallDemoList[5473:11603] Host: www.baidu.com 
2012-03-31 18:22:20.907 SmallDemoList[5473:11603] Port: (null) 
2012-03-31 18:22:20.907 SmallDemoList[5473:11603] Path: /s 
2012-03-31 18:22:20.907 SmallDemoList[5473:11603] Relative path: /s 
2012-03-31 18:22:20.907 SmallDemoList[5473:11603] Path components as array: ( 
 "/", 
) 
2012-03-31 18:22:20.916 SmallDemoList[5473:11603] Parameter string: (null) 
2012-03-31 18:22:20.917 SmallDemoList[5473:11603] Query: tn=baiduhome_pg&bs=NSRUL&f=8&rsv_bp=1&rsv_spt=1&wd=NSurl&inputT=2709 
2012-03-31 18:22:20.917 SmallDemoList[5473:11603] Fragment: (null) 
2012-03-31 18:22:20.917 SmallDemoList[5473:11603] User: (null) 
2012-03-31 18:22:20.917 SmallDemoList[5473:11603] Password: (null)								 
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