Http get 请求

复制代码 代码如下:

// 组合一个搜索字符串

NSString *urlStr = [NSString stringWithFormat:@"http://www.baidu.com/s"];

// 字符串转化为URL

NSURL *url = [NSURL URLWithString:urlStr];

// NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

// [request setURL:url];

// [request setHTTPMethod:@"POST"];

// [request setTimeoutInterval:60];

// [request setHTTPBody:_data];

// [request setValue:@"ttt" forHTTPHeaderField:@"cookies"];

// url转化为一个请求

NSURLRequest *request = [NSURLRequest requestWithURL:url];

// 状态请求

NSURLResponse *response;

// 链接一个请求

NSData *resultData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];

// 返回数据转为字符串

NSData *dataString = [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding];

NSLog(@"%@", dataString);

// 解析json吧

Http异步请求

复制代码 代码如下:

- (void)viewDidLoad

{

[super viewDidLoad];

// Do any additional setup after loading the view.

_data = [[NSMutableData alloc] init];

// 组合一个搜索字符串

NSString *urlStr = [NSString stringWithFormat:@"http://www.baidu.com/s"];

NSURL *url = [NSURL URLWithString:urlStr];

NSURLRequest *request = [NSURLRequest requestWithURL:url];

//发起请求，定义代理

[NSURLConnection connectionWithRequest:request delegate:self];

}

// 分批返回数据

- (void)connection:(NSURLConnection *) connection didReceiveData:(NSData *)data {

[_data appendData:data];

NSLog(@"%@", _data);

}

// 数据完全返回完毕

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

NSString *dataString = [[NSString alloc] initWithData:_data encoding:NSUTF8StringEncoding];

NSLog(@"%@", dataString);

}