如何在iOS中使用POST? [英] How to use POST in iOS?

问题描述

发布时间表请求

NSString *str = [NSString stringWithFormat:@"{\"userId\":\"733895\",\"startDate\":\"24-04-2016\",\"endDate\":\"25-04-2016\"}"];
NSData *responseData = [str dataUsingEncoding:NSUTF8StringEncoding];
NSMutableURLRequest *request =
[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://15.0.3.1/FFDCollector/timeSheet"]];
[request setHTTPMethod:@"POST"];
NSError *error1 = nil;
NSDictionary* dictionary = [NSJSONSerialization
                            JSONObjectWithData:responseData
                            options:kNilOptions
                            error:&error1];
NSData *jsonData1 = [NSJSONSerialization dataWithJSONObject:dictionary options:NSJSONWritingPrettyPrinted error:&error1];
if (jsonData1) {

处理数据

[request setHTTPBody:jsonData1];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Assigned"];
    (void)[[NSURLConnection alloc] initWithRequest:request delegate:self];

}

我在这里没有得到答复.

I'm not getting the response here.

NSLog(@"%@",responseData);

推荐答案

问题是(a)如何实现NSURLConnectionDataDelegate方法；或(b)您的服务器如何处理请求.

The problem is either (a) how you implemented the NSURLConnectionDataDelegate methods; or (b) how your server processed the request.

在第一个问题上，由于无论如何都弃用了NSURLConnection，我们可以使用NSURLSession，简化您的代码，并消除NSURLConnection数据源和委托代码的潜在问题根源:

On that first issue, because NSURLConnection is deprecated anyway, we can use NSURLSession, simplify your code, and eliminate the potential source of problem of the NSURLConnection data source and delegate code:

NSError *encodeError;
NSDictionary *parameters = @{@"userId":@"733895",@"startDate":@"24-04-2016",@"endDate":@"25-04-2016"};

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://15.0.3.1/FFDCollector/timeSheet"]];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPBody:[NSJSONSerialization dataWithJSONObject:parameters options:0 error:&encodeError]];
NSAssert(request.HTTPBody, @"Encoding failed: %@", error);

NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
    if (error) {
        NSLog(@"Network error: %@", error);
    }

    if (data == nil) {
        return;
    }

    NSError *parseError;
    NSDictionary *responseObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
    if (!responseObject) {
        NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"could not parse; responseString = %@", responseString);
        return;
    }

    NSLog(@"Everything ok; responseObject = %@", responseObject);
}];
[task resume];

注意，我也整理了JSON请求的结构.更重要的是，我也在进行错误处理，因此，如果无法解析JSON响应，我们可以了解原因.

Note, I tidied up the building of the JSON request, too. More importantly, I'm also doing error handling, so if the JSON response can't be parsed, we can see why.

就无法处理响应的原因而言，Web服务代码中可能存在问题.例如，也许网络会生成对application/x-www-form-urlencoded请求的JSON响应.可能有很多事情.但是如果不执行此日志记录，您将永远不知道为什么会失败.

In terms of reasons why the response cannot be processed, there could be an issue in the web service code. For example, perhaps the web generates JSON response to application/x-www-form-urlencoded requests. It could be many things. But without doing this logging, you will never know why it failed.

请注意，在iOS 9中，您需要告诉项目您愿意接受与Web服务的不安全连接.因此，右键单击info.plist，打开为"-源代码"，然后将以下内容添加到其中:

Note, in iOS 9, you need to tell your project that you're willing to accept insecure connections to your web service. So right-click on the info.plist, "Open As" - "Source code" and then add the following to it:

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>15.0.3.1</key>
        <dict>
            <!--Include to allow subdomains-->
            <key>NSIncludesSubdomains</key>
            <true/>
            <!--Include to allow HTTP requests-->
            <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
            <true/>
            <!--Include to specify minimum TLS version-->
            <key>NSTemporaryExceptionMinimumTLSVersion</key>
            <string>TLSv1.1</string>
        </dict>
    </dict>
</dict>

这篇关于如何在iOS中使用POST?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！