NSURL其实就是我们在浏览器上看到的网站地址，这不就是一个字符串么，为什么还要在写一个NSURL呢，主要是因为网站地址的字符串都比较复杂，包括很多请求参数，这样在请求过程中需要解析出来每个部门，所以封装一个NSURL，操作很方便：
- 2012-08-29 15:52:23.781 NSurl[3560:f803] Scheme: http
- 2012-08-29 15:52:32.793 NSurl[3560:f803] Host: www.baidu.com
- 2012-08-29 15:52:39.102 NSurl[3560:f803] Port: (null)
- 2012-08-29 15:52:42.590 NSurl[3560:f803] Path: /s
- 2012-08-29 15:52:52.516 NSurl[3560:f803] Relative path: /s
- 2012-08-29 15:53:05.576 NSurl[3560:f803] Path components as array: (
- "/",
- s
- )
- 2012-08-29 15:53:32.861 NSurl[3560:f803] Parameter string: (null)
- 2012-08-29 15:53:37.528 NSurl[3560:f803] Query: tn=baiduhome_pg&bs=NSRUL&f=8&rsv_bp=1&rsv_spt=1&wd=NSurl&inputT=2709
- 2012-08-29 15:53:52.942 NSurl[3560:f803] Fragment: (null)
- 2012-08-29 15:53:54.539 NSurl[3560:f803] User: (null)
- 2012-08-29 15:53:57.808 NSurl[3560:f803] Password: (null)
1:NSURL初始化方法:
- NSURL *url=[NSURL URLWithString:@"http://www.baidu.com?id=1"];
2:解决NSURL初始化失败的相关解决方案.
将传进来的NSString 进行 UTF8 转码即可.
1:针对 URLWithString 初始化失败的解决方案
- 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];
2:针对 fileURLWithPath 初始化失败的解决方案
- self.filePathString = [self.filePathString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
- NSURL *url = [NSURL fileURLWithPath:self.filePathString];
转码成功后 会自动 在字符串左侧添加 "file:///"
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.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]);
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: (
- "/",
- s
- )
- 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)
4:根据文件名称和文件后缀获取程序包内容文件的路径
NSURL *urlKindEditor = [[NSBundlemainBundle]URLForResource:@"simple"withExtension:@"html"subdirectory:@"KindEditor/examples"];
URLForResource:文件名称
withExtension:文件后缀
subdirectory:在程序包中的哪个子目录中寻找.
如果没有找到将会返回nil
找到后返回如下路径: file://localhost/Users/amarishuyi/Library/Application Support/iPhone Simulator/5.1/Applications/FB0CDABC-D0E2-45FF-AA2C-959E8A65ADB4/SmallDemoList.app/KindEditor/examples/simple.html
