IOS 开发AFNetworking 3.0+ 遇到的问题

问题1：

接收不到服务器的数据：
添加代码：

//如果报接受类型不一致请替换一致text/html或别的 
_sharedClient.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@”text/html”]; 

问题2：

服务器接收不到参数
请求参数确保和你选择的格式一致。

//申明返回的结果是json类型 
_sharedClient.responseSerializer = [AFJSONResponseSerializer serializer]; 
//申明请求的数据是json类型 
_sharedClient.requestSerializer=[AFJSONRequestSerializer serializer]; 

如果不确定是什么格式，把这两句话注释掉就行。

更新 其他（以下代码并不是3.0+）
我们在开发过程中，经常会遇到有些页面不止一个网络请求，有时候需要两个三个甚至更多，这个时候我们就需要队列请求，下边是GET请求的多个请求放在队列里边：

[objc] view plain copy print? 
NSURL *url = [NSURL URLWithString:@”http://www.baidu.com“];

NSURLRequest *request = [NSURLRequest requestWithURL:url];  

AFHTTPRequestOperation *operation1 = [[AFHTTPRequestOperation alloc] initWithRequest:request];  

[operation1 setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {  

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

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {  

    NSLog(@"Error: %@", error);  

}];  





NSURL *url2 = [NSURL URLWithString:@"http://www.sohu.com"];  

NSURLRequest *request2 = [NSURLRequest requestWithURL:url2];  

AFHTTPRequestOperation *operation2 = [[AFHTTPRequestOperation alloc] initWithRequest:request2];  

[operation2 setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {  

    NSLog(@"Response2: %@", [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]);  

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {  

    NSLog(@"Error: %@", error);  

}];  







NSURL *url3 = [NSURL URLWithString:@"http://www.sina.com"];  

NSURLRequest *request3 = [NSURLRequest requestWithURL:url3];  

AFHTTPRequestOperation *operation3 = [[AFHTTPRequestOperation alloc] initWithRequest:request3];  

[operation3 setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {  

    NSLog(@"Response3: %@", [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]);  

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {  

    NSLog(@"Error: %@", error);  

}];  





//同时请求  

NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init];  

[operationQueue setMaxConcurrentOperationCount:3];  

[operationQueue addOperations:@[operation1, operation2, operation3] waitUntilFinished:NO];  





//operation2 在 operation1 请求完成后执行  

NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init];  

[operation2 addDependency:operation1];  

[operationQueue addOperations:@[operation1, operation2, operation3] waitUntilFinished:NO];  

下边是POST请求：

[objc] view plain copy print? 
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@”https://gowalla.com/friendships/request?user_id=1699“]]; 
[request setHTTPMethod:@”POST”];

NSDictionary *headers = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@”Token token=\”%@\”“, kOAuthToken] forKey:@”Authorization”]; 
[request setAllHTTPHeaderFields:headers];

AFHTTPRequestOperation *operation = [AFHTTPRequestOperation operationWithRequest:request completion:^(NSURLRequest *request, NSHTTPURLResponse *response, NSData *data, NSError *error) { 
BOOL HTTPStatusCodeIsAcceptable = [[NSIndexSet indexSetWithIndexesInRange:NSMakeRange(200, 100)] containsIndex:[response statusCode]]; 
if (HTTPStatusCodeIsAcceptable) { 
NSLog(@”Friend Request Sent”); 
} else { 
NSLog(@”[Error]: (%@ %@) %@”, [request HTTPMethod], [[request URL] relativePath], error); 
} 
}];

NSOperationQueue *queue = [[[NSOperationQueue alloc] init] autorelease]; 
[queue addOperation:operation];