使用ASIRequest库进行Objective-C网络爬虫示例

#import "ASIHTTPRequest.h"

#import "ASIWebPage.h"

// 请求URL

NSString * const kRequestURL = @"http://example.com";

// 请求方法

ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:kRequestURL]];

// 设置请求方法为GET

[request setRequestMethod:@"GET"];

// 开始请求

[request startSynchronous];

// 检查是否有错误发生

NSError *error = [request error];

if (!error) {

// 获取响应状态码

NSInteger responseStatusCode = [request responseStatusCode];

if (responseStatusCode == 200) {

// 获取网页内容

NSString *responseString = [[request responseString] stringByReplacingOccurrencesOfString:@"<br>" withString:@"\n"];

NSLog(@"网页内容: %@", responseString);

} else {

NSLog(@"请求失败，状态码: %ld", (long)responseStatusCode);

}

} else {

NSLog(@"请求失败，错误信息: %@", error);

}