Http get 懇求

// 組合一個搜索字符串
NSString *urlStr = [NSString stringWithFormat:@"http://www.baidu.com/s?wd=%@", @"php"];
// 字符串轉化為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轉化為一個懇求
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 形態懇求
NSURLResponse *response;
// 鏈接一個懇求
NSData *resultData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
// 前往數據轉為字符串
NSData *dataString = [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding];
NSLog(@"%@", dataString);
// 解析json吧

Http異步懇求

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.

_data = [[NSMutableData alloc] init];

// 組合一個搜索字符串
NSString *urlStr = [NSString stringWithFormat:@"http://www.baidu.com/s?wd=%@", @"php"];
NSURL *url = [NSURL URLWithString:urlStr];

NSURLRequest *request = [NSURLRequest requestWithURL:url];

//發起懇求，定義代理
[NSURLConnection connectionWithRequest:request delegate:self];

}

// 分批前往數據
- (void)connection:(NSURLConnection *) connection didReceiveData:(NSData *)data {
[_data appendData:data];
NSLog(@"%@", _data);
}

// 數據完全前往終了
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSString *dataString = [[NSString alloc] initWithData:_data encoding:NSUTF8StringEncoding];
NSLog(@"%@", dataString);
}

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