我已经将NSData对象细分为我的.h和.m文件，如下所示：
@interface Test : NSData // and so forth
我创建了一个函数，该函数生成
JSON数据以POST的形式发送回服务器。我在代码的这一部分：NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
问题1：
如何知道连接/发布的时间？在下面的if / else中吗？
if(conn) {
NSLog(@"Connection Successful");
} else {
NSLog(@"Connection could not be made");
}
问题2：
我如何使用下面的这些委托方法来获取返回的数据？
// This method is used to receive the data which we get using post method.
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData*)data
// This method receives the error report in case of connection is not made to server.
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
// This method is used to process the data after connection has made successfully.
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
最佳答案
这对我有用
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"API link"]
NSLog(@"%@",url.standardizedURL);
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response,
NSData *data, NSError *connectionError)
{
NSLog(@"balh %@",connectionError);
if (data.length > 0 && connectionError == nil)
{
NSDictionary *response = [NSJSONSerialization JSONObjectWithData:data
options:0
error:NULL];
NSString * string = [[NSString alloc] initWithData:data encoding:NSStringEncodingConversionAllowLossy];
NSLog(@"%@ %@",response,string);
[self dismissViewControllerAnimated:YES completion:^{
}];
}
}];
为了检查连接，您可以在NSURLConnection语句之后使用此语句
if(response){NSLog(@"Connection Established");}else{NSLog(@"Connection not established");}