iphone网络post连接的两种处理方式(同步和异步)(zz)

第一种： 直接返回方式。

-(void)UpadaPost:(NSString *)strcontext URL:(NSString *)urlstr{

NSLog(urlstr);

NSLog(strcontext);

assert(strcontext != NULL);

assert(urlstr != NULL);

NSData *postData = [strcontext dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];

[request setURL:[NSURL URLWithString:urlstr]];

[request setHTTPMethod:@"POST"];

[request setValue:postLength forHTTPHeaderField:@"Content-Length"];

[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

[request setHTTPBody:postData];

NSURLResponse *respone;

NSError *error;

NSData *myReturn =[NSURLConnection sendSynchronousRequest:request returningResponse:&respone

error:error];

NSLog(@"%@", [[NSString alloc] initWithData:myReturn encoding:NSUTF8StringEncoding]);

}

第二种，采用事件代理方式

-(void)UpadaPost:(NSString *)strcontext URL:(NSString *)urlstr{

NSLog(urlstr);

NSLog(strcontext);

assert(strcontext != NULL);

assert(urlstr != NULL);

NSData *postData = [strcontext dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];

[request setURL:[NSURL URLWithString:urlstr]];

[request setHTTPMethod:@"POST"];

[request setValue:postLength forHTTPHeaderField:@"Content-Length"];

[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

[request setHTTPBody:postData];

NSURLConnection *conn=[[NSURLConnection alloc] initWithRequest:request delegate:self];

if (conn)

{

NSLog(@"Connection success");

[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

[conn retain];

}

else

{

// inform the user that the download could not be made

}

}

// 收到响应时, 会触发

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {

// 注意这里将NSURLResponse对象转换成NSHTTPURLResponse对象才能去

NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse*)response;

if ([response respondsToSelector:@selector(allHeaderFields)]) {

NSDictionary *dictionary = [httpResponse allHeaderFields];

NSLog([dictionary description]);

NSLog(@"%d",[response statusCode]);

}

}

// Forward errors to the delegate.

//链接错误

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {

//[self performSelectorOnMainThread:@selector(httpConnectEnd) withObject:nil waitUntilDone:NO];

NSLog(@"%@",[error localizedDescription]);

}

// Called when a chunk of data has been downloaded.

//接收数据 每收到一次数据, 会调用一次

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {

// Process the downloaded chunk of data.

NSLog(@"%d", [data length]);

//NSLog(@"%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);

//[self performSelectorOnMainThread:@selector(updateProgress) withObject:nil waitUntilDone:NO];

}

//接收结束

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

NSLog(@"%@",connection);

//NSLog(@"%lld", received_);

//[self performSelectorOnMainThread:@selector(httpConnectEnd) withObject:nil waitUntilDone:NO];

// Set the condition which ends the run loop.

}