Http get 要求

// 組合一個搜刮字符串
    NSString *urlStr = [NSString stringWithFormat:@"http://www.百度.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轉化為一個要求
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    // 狀況要求
    NSURLResponse *response;
    // 鏈接一個要求
    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異步要求

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    _data = [[NSMutableData alloc] init];
    
    // 組合一個搜刮字符串
    NSString *urlStr = [NSString stringWithFormat:@"http://www.百度.com/s?wd=%@", @"php"];
    NSURL *url = [NSURL URLWithString:urlStr];
    
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    //提議要求，界說署理
    [NSURLConnection connectionWithRequest:request delegate:self];
    
}
 
// 分批前往數據
- (void)connection:(NSURLConnection *) connection didReceiveData:(NSData *)data {
    [_data appendData:data];
    NSLog(@"%@", _data);
}
 
// 數據完整前往終了
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    NSString *dataString =  [[NSString alloc] initWithData:_data encoding:NSUTF8StringEncoding];
    NSLog(@"%@", dataString);
}

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