blocks|key|1062431|text|下面是我要做的(请注意，发送到我的服务器的JSON需要是一个字典，对于key+=quest..{：问题字典{+=>+}}+)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1062432|NSArray+*objects+=+[NSArray+arrayWithObjects:[[NSUserDefaults+standardUserDefaults]valueForKey:@"StoreNickName"],
++[[UIDevice+currentDevice]+uniqueIdentifier],+[dict+objectForKey:@"user_question"],+++++nil];
NSArray+*keys+=+[NSArray+arrayWithObjects:@"nick_name",+@"UDID",+@"user_question",+nil];
NSDictionary+*questionDict+=+[NSDictionary+dictionaryWithObjects:objects+forKeys:keys];

NSDictionary+*jsonDict+=+[NSDictionary+dictionaryWithObject:questionDict+forKey:@"question"];

NSString+*jsonRequest+=+[jsonDict+JSONRepresentation];

NSLog(@"jsonRequest+is+%25@",+jsonRequest);

NSURL+*url+=+[NSURL+URLWithString:@"https://xxxxxxx.com/questions"];

NSMutableURLRequest+*request+=+[NSMutableURLRequest+requestWithURL:url
+++++++++++++cachePolicy:NSURLRequestUseProtocolCachePolicy+timeoutInterval:60.0];


NSData+*requestData+=+[jsonRequest+dataUsingEncoding:NSUTF8StringEncoding];

[request+setHTTPMethod:@"POST"];
[request+setValue:@"application/json"+forHTTPHeaderField:@"Accept"];
[request+setValue:@"application/json"+forHTTPHeaderField:@"Content-Type"];
[request+setValue:[NSString+stringWithFormat:@"%25d",+[requestData+length]]+forHTTPHeaderField:@"Content-Length"];
[request+setHTTPBody:+requestData];

NSURLConnection+*connection+=+[[NSURLConnection+alloc]initWithRequest:request+delegate:self];
if+(connection)+{
+receivedData+=+[[NSMutableData+data]+retain];
}|code-block|syntax|javascript|1062433|然后，通过以下方式处理receivedData：|1062434|NSString+*jsonString+=+[[NSString+alloc]+initWithData:data+encoding:NSUTF8StringEncoding];
NSDictionary+*jsonDict+=+[jsonString+JSONValue];
NSDictionary+*question+=+[jsonDict+objectForKey:@"question"];|1062435|这不是100%25清楚，需要重新阅读，但一切都应该在这里让你入门。据我所知，这是异步的。在进行这些调用时，我的UI未被锁定。希望这能有所帮助。|1062436|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Here's what I do (please note that the JSON going to my server needs to be a dictionary with one value (another dictionary) for key = question..i.e. {:question => { dictionary } } ):

<pre><code>NSArray *objects = [NSArray arrayWithObjects:[[NSUserDefaults standardUserDefaults]valueForKey:@"StoreNickName"],
 [[UIDevice currentDevice] uniqueIdentifier], [dict objectForKey:@"user_question"], nil];
NSArray *keys = [NSArray arrayWithObjects:@"nick_name", @"UDID", @"user_question", nil];
NSDictionary *questionDict = [NSDictionary dictionaryWithObjects:objects forKeys:keys];

NSDictionary *jsonDict = [NSDictionary dictionaryWithObject:questionDict forKey:@"question"];

NSString *jsonRequest = [jsonDict JSONRepresentation];

NSLog(@"jsonRequest is %@", jsonRequest);

NSURL *url = [NSURL URLWithString:@"https://xxxxxxx.com/questions"];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
 cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];


NSData *requestData = [jsonRequest dataUsingEncoding:NSUTF8StringEncoding];

[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:[NSString stringWithFormat:@"%d", [requestData length]] forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody: requestData];

NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
if (connection) {
 receivedData = [[NSMutableData data] retain];
}
</code></pre>

The receivedData is then handled by:

<pre><code>NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *jsonDict = [jsonString JSONValue];
NSDictionary *question = [jsonDict objectForKey:@"question"];
</code></pre>

This isn't 100% clear and will take some re-reading, but everything should be here to get you started. And from what I can tell, this is asynchronous. My UI is not locked up while these calls are made. Hope that helps.

blocks|key|1062459|text|这是一篇很棒的使用Restkit的文章|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1062460|它解释了如何将嵌套数据序列化为JSON并将数据附加到HTTP+POST请求。|1062461|entityMap|0|LINK|mutability|MUTABLE|url|http://flaviusim.com/blog/ios-nested-json-post-with-restkit/^0|9|7|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Here is a great article using <a href="http://flaviusim.com/blog/ios-nested-json-post-with-restkit/" rel="nofollow">Restkit</a>

It explains on serializing nested data into JSON and attaching the data to a HTTP POST request.

blocks|key|848171|text|到目前为止，你们中的大多数人已经知道了这一点，但我发布了这篇文章，以防万一，你们中的一些人仍然在为iOS6%2B中的JSON而苦苦挣扎。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|848172|在iOS6和更高版本中，我们使用的NSJSONSerialization+Class速度很快，并且不依赖于包含“外部”库。|offset|length|848173|NSDictionary+*result+=+[NSJSONSerialization+JSONObjectWithData:[resultStr+dataUsingEncoding:NSUTF8StringEncoding]+options:0+error:nil];+|code-block|syntax|javascript|848174|这是iOS6和更高版本现在可以解析JSON+efficiently.The的方式。SBJson的使用也是ARC之前的实现，如果您在ARC环境中工作，也会带来这些问题。|848175|我希望这能帮到你!|848176|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/library/ios/documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html^0|0|H|P|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

Most of you already know this by now, but I am posting this, just incase, some of you are still struggling with JSON in iOS6+.

In iOS6 and later, we have the <a href="https://developer.apple.com/library/ios/documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html" rel="nofollow">NSJSONSerialization Class</a> that is fast and has no dependency on including "outside" libraries.

<pre><code>NSDictionary *result = [NSJSONSerialization JSONObjectWithData:[resultStr dataUsingEncoding:NSUTF8StringEncoding] options:0 error:nil]; 
</code></pre>

This is the way iOS6 and later can now parse JSON efficiently.The use of SBJson is also pre-ARC implementation and brings with it those issues too if you are working in an ARC environment.

I hope this helps!

blocks|key|1062581|text|下面是一个使用NSURLConnection+%2BsendAsynchronousRequest：(10.7%2B，iOS+5%2B)的更新示例，"Post“请求与接受的答案相同，为了清楚起见，这里省略了它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1062582|NSURL+*apiURL+=+[NSURL+URLWithString:
++++[NSString+stringWithFormat:@"http://www.myserver.com/api/api.php?request=%25@",+@"someRequest"]];
NSURLRequest+*request+=+[NSURLRequest+requestWithURL:apiURL];+//+this+is+using+GET,+for+POST+examples+see+the+other+answers+here+on+this+page
[NSURLConnection+sendAsynchronousRequest:request
+++++++++++++++++++++++++++++++++++queue:[NSOperationQueue+mainQueue]
+++++++++++++++++++++++completionHandler:%5E(NSURLResponse+*response,+NSData+*data,+NSError+*connectionError)+{
+++++if(data.length)+{
+++++++++NSString+*responseString+=+[[NSString+alloc]+initWithData:data+encoding:NSUTF8StringEncoding];
+++++++++if(responseString+&&+responseString.length)+{
+++++++++++++NSLog(@"%25@",+responseString);
+++++++++}
+++++}
}];|code-block|syntax|javascript|1062583|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here's an updated example that is using NSURLConnection +sendAsynchronousRequest: (10.7+, iOS 5+), The "Post" request remains the same as with the accepted answer and is omitted here for the sake of clarity:

<pre><code>NSURL *apiURL = [NSURL URLWithString:
 [NSString stringWithFormat:@"http://www.myserver.com/api/api.php?request=%@", @"someRequest"]];
NSURLRequest *request = [NSURLRequest requestWithURL:apiURL]; // this is using GET, for POST examples see the other answers here on this page
[NSURLConnection sendAsynchronousRequest:request
 queue:[NSOperationQueue mainQueue]
 completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
 if(data.length) {
 NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
 if(responseString &amp;&amp; responseString.length) {
 NSLog(@"%@", responseString);
 }
 }
}];
</code></pre>

blocks|key|1062646|text|我为此挣扎了一段时间。在服务器上运行PHP。此代码将发布一个json，并从服务器获取json回复。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1062647|NSURL+*url+=+[NSURL+URLWithString:@"http://example.co/index.php"];
NSMutableURLRequest+*rq+=+[NSMutableURLRequest+requestWithURL:url];
[rq+setHTTPMethod:@"POST"];
NSString+*post+=+[NSString+stringWithFormat:@"command1=c1&command2=c2"];
NSData+*postData+=+[post+dataUsingEncoding:NSASCIIStringEncoding];
[rq+setHTTPBody:postData];
[rq+setValue:@"application/x-www-form-urlencoded"+forHTTPHeaderField:@"Content-Type"];
NSOperationQueue+*queue+=+[[NSOperationQueue+alloc]+init];

[NSURLConnection+sendAsynchronousRequest:rq+queue:queue+completionHandler:%5E(NSURLResponse+*response,+NSData+*data,+NSError+*error)
+{
+++++if+([data+length]+>+0+&&+error+==+nil){
+++++++++NSError+*parseError+=+nil;
+++++++++NSDictionary+*dictionary+=+[NSJSONSerialization+JSONObjectWithData:data+options:0+error:&parseError];
+++++++++NSLog(@"Server+Response+(we+want+to+see+a+200+return+code)+%25@",response);
+++++++++NSLog(@"dictionary+%25@",dictionary);
+++++}
+++++else+if+([data+length]+==+0+&&+error+==+nil){
+++++++++NSLog(@"no+data+returned");
+++++++++//no+data,+but+tried
+++++}
+++++else+if+(error+!=+nil)
+++++{
+++++++++NSLog(@"there+was+a+download+error");
+++++++++//couldn't+download

+++++}
+}];|code-block|syntax|javascript|1062648|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I struggled with this for a while. Running PHP on the server. This code will post a json and get the json reply from the server

<pre><code>NSURL *url = [NSURL URLWithString:@"http://example.co/index.php"];
NSMutableURLRequest *rq = [NSMutableURLRequest requestWithURL:url];
[rq setHTTPMethod:@"POST"];
NSString *post = [NSString stringWithFormat:@"command1=c1&amp;command2=c2"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding];
[rq setHTTPBody:postData];
[rq setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];

[NSURLConnection sendAsynchronousRequest:rq queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
 {
 if ([data length] &gt; 0 &amp;&amp; error == nil){
 NSError *parseError = nil;
 NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&amp;parseError];
 NSLog(@"Server Response (we want to see a 200 return code) %@",response);
 NSLog(@"dictionary %@",dictionary);
 }
 else if ([data length] == 0 &amp;&amp; error == nil){
 NSLog(@"no data returned");
 //no data, but tried
 }
 else if (error != nil)
 {
 NSLog(@"there was a download error");
 //couldn't download

 }
 }];
</code></pre>

I'm new to objective-c and I'm starting to put a great deal of effort into request/response as of recent. I have a working example that can call a url (via http GET) and parse the json returned.

The working example of this is below

<pre><code>- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
 [responseData setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
 [responseData appendData:data];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
 NSLog([NSString stringWithFormat:@"Connection failed: %@", [error description]]);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
 [connection release];
 //do something with the json that comes back ... (the fun part)
}

- (void)viewDidLoad
{
 [self searchForStuff:@"iPhone"];
}

-(void)searchForStuff:(NSString *)text
{
 responseData = [[NSMutableData data] retain];
 NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.whatever.com/json"]];
 [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
</code></pre>

My first question is - will this approach scale up? Or is this not async (meaning I block the UI thread while the app is waiting for the response)

My second question is - how might I modify the request part of this to do a POST instead of GET? Is it simply to modify the HttpMethod like so?

<pre><code>[request setHTTPMethod:@"POST"];
</code></pre>

And finally - how do I add a set of json data to this post as a simple string (for example)

<pre><code>{
 "magic":{
 "real":true
 },
 "options":{
 "happy":true,
 "joy":true,
 "joy2":true
 },
 "key":"123"
}
</code></pre>

Thank you in advance

How to send json data in the Http request using NSURLRequest

服务器

JSON

我是objective-c的新手，到最近为止，我开始在请求/响应上投入大量的精力。我有一个可以调用url (通过http GET)并解析返回的json的工作示例。这方面的工作示例如下- (void)connection:(NSURLConnection *)connection didReceiveResponse:(...

问如何使用NSURLRequest在Http请求中发送json数据
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