如何从 UITextField 输入中使用 setHTTPBody答案

【问题标题】：How to use setHTTPBody from UITextField input如何从 UITextField 输入中使用 setHTTPBody
【发布时间】：2015-10-12 13:16:42
【问题描述】：

我正在使用 mycontacts RESTful API 集成到我的应用程序中。现在，我想使用 UITextField 而不是手动输入的用户名和密码。我不知道，如何在 setHTTPBody 中做到这一点。有什么建议吗？

NSURL *URL = [NSURL URLWithString:@"https://api.addressbook.io/v1/login"];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPMethod:@"POST"];

[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

//Here I want to use username and password obtained by UITextField.
[request setHTTPBody:[@"{\n  \"username\": \"Enter username\",\n  \"password\": \"EnterPassword\",\n  \"client\": \"apiary\"\n}" dataUsingEncoding:NSUTF8StringEncoding]];

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request
                                        completionHandler:
                              ^(NSData *data, NSURLResponse *response, NSError *error) {

                                  if (error) {
                                      // Handle error...
                                      return;
                                  }

                                  if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
                                      NSLog(@"Response HTTP Status code: %ld\n", (long)[(NSHTTPURLResponse *)response statusCode]);
                                      NSLog(@"Response HTTP Headers:\n%@\n", [(NSHTTPURLResponse *)response allHeaderFields]);
                                  }

                                  NSString* body = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
                                  NSLog(@"Response Body:\n%@\n", body);
                              }];
[task resume];

【问题讨论】：

标签： ios xcode ios7 ios8 ios6

【解决方案1】：

我猜你不想让按钮点击应该调用哪个 web 服务。您可以做的是为 UItextField 设置委托并使用此委托方法

- (void)textFieldDidEndEditing:(UITextField *)textField;

此委托方法的作用是每次您移出文本字段时都会调用它。在这里您可以检查用户是否输入了文本字段并设置了您的 http 正文。

【讨论】：

[request setHTTPBody:[@"{\n \"username\": \"Enter username\",\n \"password\": \"EnterPassword\",\n \"client \": \"apiary\"\n}" dataUsingEncoding:NSUTF8StringEncoding]];我已经实现了这些代表和一切。我只想知道，我怎样才能使用上面那一行，因为上面那一行是字符串体。

【解决方案2】：

使用 NSString 并使用文本字段中的用户名和密码对其进行格式化，并将该正文发送到 setHTTPbody。

NSURL *URL = [NSURL URLWithString:@"https://api.addressbook.io/v1/login"];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPMethod:@"POST"];

[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

//Improved code lines
NSString *username = ((UITextField*)[self.view viewWithTag:1]).text;
NSString *password = ((UITextField*)[self.view viewWithTag:2]).text;

NSString *body = [NSString stringWithFormat:@"{\n  \"username\": \"%@\",\n  \"password\": \"%@\",\n  \"client\": \"apiary\"\n}",username,password];

[request setHTTPBody:[body dataUsingEncoding:NSUTF8StringEncoding]];
 //Improved code lines end

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request
                                        completionHandler:
                              ^(NSData *data, NSURLResponse *response, NSError *error) {

                                  if (error) {

                                      [self alert:@"Error" message:@"Check network connection"];

                                      return;
                                  }

                                  if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
                                      NSLog(@"Response HTTP Status code: %ld\n", (long)[(NSHTTPURLResponse *)response statusCode]);

                                      }
                                      NSLog(@"Response HTTP Headers:\n%@\n", [(NSHTTPURLResponse *)response allHeaderFields]);
                                  }

                                  NSString* body = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
                                  NSLog(@"Response Body:\n%@\n", body);
                              }];
[self.view endEditing:YES];
[task resume];

【讨论】：