#import <UIKit/UIKit.h>//加入头文件#import "AsyncSocket.h"@interface ViewController : UIViewController<AsyncSocketDelegate>@end

- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.        AsyncSocket *socket=[[AsyncSocket alloc] initWithDelegate:self];    [socket connectToHost:@"www.baidu.com" onPort:80 error:nil];        [socket readDataWithTimeout:3 tag:1];    [socket writeData:[@"GET / HTTP/1.1nn" dataUsingEncoding:NSUTF8StringEncoding] withTimeout:3 tag:1];    }#pragma -mark -socket代理- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{    NSLog(@"did connect to host");}- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{        NSLog(@"did read data");    NSString* message = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];    NSLog(@"message is: n%@",message);}