NSURL其實就是我們在瀏覽器上看到的網(wǎng)站地址，這不就是一個字符串么，為什么還要在寫一個NSURL呢，主要是因為網(wǎng)站地址的字符串都比較復(fù)雜，包括很多請求參數(shù)，這樣在請求過程中需要解析出來每個部門，所以封裝一個NSURL，操作很方便。參考鏈接

簡單用法:

    NSString *str = @"http://www.itdecent.cn";
    // NSString轉(zhuǎn)成NSURL
    NSURL *URL = [NSURL URLWithString:str];
    NSString *scheme = [URL scheme];// 取出協(xié)議頭
    NSLog(@"%@",scheme);
    NSString *host = [URL host];// 取出主機地址
    NSLog(@"%@",host);
    
    // NSURL轉(zhuǎn)成NSString
    NSString *str1 = [URL absoluteString];
    NSLog(@"%@",str1);

Simple.png

全部用法:

    NSURL *url = [NSURL URLWithString:@"https://www.baidu.com/s?wd=coderzb&rsv_spt=1&rsv_iqid=0x8ec61a4600000289&issp=1&f=8&rsv_bp=0&rsv_idx=2&ie=utf-8&rqlang=&tn=baiduhome_pg&rsv_enter=1&inputT=9743"];
    
    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]);

Result.png