轉(zhuǎn)載自：此處

1.
    NSURL *url = [NSURL URLWithString:@"http://www.baidu.com/search?id=1"];
2
    NSLog(@"scheme:%@", [url scheme]); //協(xié)議 http
3
    NSLog(@"host:%@", [url host]);     //域名 www.baidu.com
4
    NSLog(@"absoluteString:%@", [url absoluteString]); //完整的url字符串 http://www.baidu.com:8080/search?id=1   (剛才在真機(jī)上跑了一下，并沒有打印出來端口 8080 啊)
5
    NSLog(@"relativePath: %@", [url relativePath]); //相對路徑 search
6
    NSLog(@"port :%@", [url port]);  // 端口 8080
7
    NSLog(@"path: %@", [url path]);  // 路徑 search
8
    NSLog(@"pathComponents:%@", [url pathComponents]); // search
9
    NSLog(@"Query:%@", [url query]);  //參數(shù) id=1