百度手机版.png

实现效果

• 1.查找WebView

WebView

• 2.拖动WebView到ViewController

• 3.导入库

#import <sys/socket.h>
#import <netinet/in.h>
#import <arpa/inet.h>

• 4.请求数据

#import "ViewController.h"
#import <sys/socket.h>
#import <netinet/in.h>
#import <arpa/inet.h>
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIWebView *webView;
@property (nonatomic, assign) int clientSocket;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //1 连接百度的服务器
    BOOL result = [self content:@"119.75.216.20" port:80];
    if (!result) {
        NSLog(@"NO");
        return;
    }else {
        NSLog(@"YES");
    }
    //构造http请求头
    NSString *request = @"GET / HTTP/1.1\r\n"
                        "Host: www.baidu.com\r\n\r\n"
                        "User-Agent:Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1";
    //服务器返回的响应 响应体
    NSString *respose = [self sendAndRecv:request];
    NSLog(@"---%@",respose);
    //关闭连接 http协议要求,请求结束后要关闭连接
    close(self.clientSocket);
    //找到\r\n\r\n!
//    NSRange rang = [respose rangeOfString:@"\r\n\r\n"];
    //从\r\n\r\n之后的第一个位置开始截取字符串 响应体
//    NSString *html = [respose substringFromIndex:rang.length + rang.location];
//    [self.webView loadHTMLString:respose baseURL:[NSURL URLWithString:@"http://www.baidu.com"]];
    [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.baidu.com"]]];
    
    
}
//1.连接服务器
-(BOOL)content:(NSString *)ip port:(int)port {
    int clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    self.clientSocket = clientSocket;
    struct sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_addr.s_addr = inet_addr(ip.UTF8String);
    addr.sin_port = htons(port);
    int result = connect(clientSocket, (const struct sockaddr *)&addr, sizeof(addr));
    if (result == 0) {
        return YES;
    }else {
        return NO;
    }
    
}
//2.发送和接收数据
-(NSString *)sendAndRecv:(NSString *)sendMsg{
    //3 向服务器发送数据
    //成功则返回实际参数,失败返回1
    const char *msg = sendMsg.UTF8String;
    ssize_t sendCount = send(self.clientSocket, msg, strlen(msg), 0);
    NSLog(@"发送的字节数 %zd",sendCount);
    //4 接收服务器返回的数据
    //返回的是实际接收的字节数
    uint8_t buffer[1024];
    NSMutableData *mData = [NSMutableData data];
    ssize_t recvCount = recv(self.clientSocket, buffer, sizeof(buffer), 0);
    [mData appendBytes:buffer length:recvCount];
    
    //服务器返回多次数据,等所有的数据都接收完成,再转换成字符串
    while (recvCount != 0) {
        recvCount = recv(self.clientSocket, buffer, sizeof(buffer), 0);
        NSLog(@"接收的字节数 %zd",recvCount);
        [mData appendBytes:buffer length:recvCount];
    }
    
    //把字节数组转换成字符串
    NSString *recvMsg = [[NSString alloc]initWithData:mData.copy encoding:NSUTF8StringEncoding];

    return recvMsg;
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end