[英]No Response from NSURLConnection
I have the following code, which should simply load a URL with post data, and then grab the HTML response from the server: 我有以下代码,该代码应该简单地用发布数据加载URL,然后从服务器获取HTML响应:
// Send log in request to server
NSString *post = [NSString stringWithFormat:@"username=%@&password=%@", text_field_menu_username.text, text_field_menu_password.text];
NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSMutableURLRequest *request;
[request setURL:[NSURL URLWithString:@"http://example.com/test.php"]]; // Example Only
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
{
// Handle response
NSString *response_string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"Data 1: %@", response);
NSLog(@"Data 2: %@", data);
NSLog(@"Data 3: %@", error);
NSLog(@"Data 4: %@", response_string);
}];
Here's the output from each of the NSLog
's: 这是每个
NSLog
的输出:
Data 1: (null)
Data 2: (null)
Data 3: (null)
Data 4:
Any idea what I am doing wrong? 知道我在做什么错吗?
You haven't initialized the request
object before setting its parameters. 您尚未在设置
request
参数之前初始化request
对象。 It should be: 它应该是:
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.