我是 iPhone 开发新手。我已经发布了带有用户名和密码的 URL。我可以在“connection didReceiveData”方法中打印数据。但是我看到“connection didReceiveData”方法被调用了两次。我不知道我哪里出错了。这是我的代码
- (void)viewDidLoad {
[super viewDidLoad];
NSString *post = [NSString stringWithFormat:@"&domain=school.edu&userType=2&referrer=http://apps.school.edu/navigator/index.jsp&username=%@&password=%@",@"xxxxxxx",@"xxxxxx"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d",[postData length]];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"https://secure.school.edu/login/process.do"]]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Current-Type"];
[request setHTTPBody:postData];
NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];
if(conn)
{
NSLog(@"Connection Successful");
}
else
{
NSLog(@"Connection could not be made");
}
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData*)data{
NSString *string = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
NSLog(@"the data %@",string);
}
整个 HTML 页面在控制台中打印了两次。所以请帮助我。谢谢。
最佳答案
您可能会收到分块的响应数据，这就是 NSURLConnection's documentation 的原因状态:
“委托(delegate)应该连接所交付的每个数据对象的内容，以构建 URL 加载的完整数据。”
为此使用 NSMutableData 实例，并且仅在收到 -connectionDidFinishLoading: 消息后才处理完整数据。
关于iphone - 在 iPhone 中发布 URL 时，连接 didReceiveData 调用了两次？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2446095/