使用 NSURLSession 发送 POST 请求
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【中文标题】使用 NSURLSession 发送 POST 请求【英文标题】：Send POST request using NSURLSession 【发布时间】：2013-10-06 14:59:53 【问题描述】：更新：找到解决方案。可以在文末阅读。
我正在尝试使用NSURLSession 对远程 REST API 执行 POST 请求。这个想法是使用两个参数发出请求：deviceId 和 textContent。
问题是服务器无法识别这些参数。服务器部分工作正常，因为我已经使用 POSTMAN for Google Chrome 发送了一个 POST 并且它工作得很好。
这是我现在使用的代码：
NSString *deviceID = [[NSUserDefaults standardUserDefaults] objectForKey:@"deviceID"];
NSString *textContent = @"New note";
NSString *noteDataString = [NSString stringWithFormat:@"deviceId=%@&textContent=%@", deviceID, textContent];
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfiguration.HTTPAdditionalHeaders = @
@"api-key" : @"API_KEY",
@"Content-Type" : @"application/json"
;
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration];
NSURL *url = [NSURL URLWithString:@"http://url_to_manage_post_requests"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPBody = [noteDataString dataUsingEncoding:NSUTF8StringEncoding];
request.HTTPMethod = @"POST";
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
// The server answers with an error because it doesn't receive the params
];
[postDataTask resume];
我用NSURLSessionUploadTask 尝试了相同的过程：
// ...
NSURL *url = [NSURL URLWithString:@"http://url_to_manage_post_requests"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
NSURLSessionUploadTask *uploadTask = [session uploadTaskWithRequest:request fromData:[noteDataString dataUsingEncoding:NSUTF8StringEncoding] completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
// The server answers with an error because it doesn't receive the params
];
[uploadTask resume];
有什么想法吗？
解决方案
我的方法的问题是我在所有请求中都发送了不正确的 Content-Type 标头。因此，代码正常工作所需的唯一更改是删除Content-Type = application/json HTTP 标头。所以正确的代码是这样的：
NSString *deviceID = [[NSUserDefaults standardUserDefaults] objectForKey:@"deviceID"];
NSString *textContent = @"New note";
NSString *noteDataString = [NSString stringWithFormat:@"deviceId=%@&textContent=%@", deviceID, textContent];
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfiguration.HTTPAdditionalHeaders = @
@"api-key" : @"API_KEY"
;
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration];
NSURL *url = [NSURL URLWithString:@"http://url_to_manage_post_requests"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPBody = [noteDataString dataUsingEncoding:NSUTF8StringEncoding];
request.HTTPMethod = @"POST";
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
// The server answers with an error because it doesn't receive the params
];
[postDataTask resume];
与其他参数一起发送图像
如果您需要使用NSURLSession 发布图像以及其他参数，这里有一个示例：
NSString *deviceID = [[NSUserDefaults standardUserDefaults] objectForKey:@"deviceID"];
NSString *textContent = @"This is a new note";
// Build the request body
NSString *boundary = @"SportuondoFormBoundary";
NSMutableData *body = [NSMutableData data];
// Body part for "deviceId" parameter. This is a string.
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", @"deviceId"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"%@\r\n", deviceID] dataUsingEncoding:NSUTF8StringEncoding]];
// Body part for "textContent" parameter. This is a string.
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", @"textContent"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"%@\r\n", textContent] dataUsingEncoding:NSUTF8StringEncoding]];
// Body part for the attachament. This is an image.
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"ranking"], 0.6);
if (imageData)
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", @"image"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:imageData];
[body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// Setup the session
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfiguration.HTTPAdditionalHeaders = @
@"api-key" : @"55e76dc4bbae25b066cb",
@"Accept" : @"application/json",
@"Content-Type" : [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]
;
// Create the session
// We can use the delegate to track upload progress
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:self delegateQueue:nil];
// Data uploading task. We could use NSURLSessionUploadTask instead of NSURLSessionDataTask if we needed to support uploads in the background
NSURL *url = [NSURL URLWithString:@"URL_TO_UPLOAD_TO"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
request.HTTPBody = body;
NSURLSessionDataTask *uploadTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
// Process the response
];
[uploadTask resume];
【问题讨论】：
切线，如果您只使用NSURLSessionUploadTask，它会将原始数据发布到您的服务器。你仍然可以使用它——例如，通过file_get_contents('php://input') in PHP——但你必须在标题中包含其他数据。
不错的解决方案！用它来创建我自己的多部分表单作曲家。
我有一个不同的问题，但关于Content-Type 的提示是我需要弄清楚的所有事情。谢谢！
应该添加问题中的“解决方案”作为答案:)
如果您有一个帖子作为答案而不是将其放在那里，请不要回答您的问题。请参考 Meta 上的这个post
【参考方案1】：
您可以尝试使用 NSDictionary 作为参数。以下将正确地将参数发送到 JSON 服务器。
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:@"[JSON SERVER"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: @"TEST ios", @"name",
@"IOS TYPE", @"typemap",
nil];
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request setHTTPBody:postData];
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
];
[postDataTask resume];
希望这会有所帮助（我正在尝试使用上述方法对 CSRF 真实性问题进行排序 - 但它确实会在 NSDictionary 中发送参数）。
【讨论】：
效果很好！谢谢@greentor！知道如何将图像与“普通”数据一起上传吗？ 我已经找到了我的第一个问题的解决方案（无需与NSJSONSerialization 混淆），并且我已经添加了发布图像的代码以及其他参数。我已经更新了原来的帖子。谢谢你的帮助:-)
非常感谢 greentor，我从很久以前就找到了解决方案。你的帖子帮助我解决了我在 ios 7 中使用 Post call to rest service 的所有问题
@sendoa ，如果您知道如何上传图像以及“普通”数据？我急需解决方案。非常感谢提前
@GaganJoshi 阅读了我最初帖子的“发送图像以及其他参数”部分 :-)【参考方案2】：
动机
当你想将 httpBody 从Dictionary 序列化到Data 时，有时我会遇到一些错误，这在大多数情况下是由于编码错误或由于非@ 而导致的数据格式错误Dictionary中的987654321@符合对象。
解决方案
根据您的要求，一种简单的解决方案是创建 String 而不是 Dictionary 并将其转换为 Data。您在Objective-C 和Swift 3.0 上编写了以下代码示例。
目标-C
// Create the URLSession on the default configuration
NSURLSessionConfiguration *defaultSessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration:defaultSessionConfiguration];
// Setup the request with URL
NSURL *url = [NSURL URLWithString:@"yourURL"];
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
// Convert POST string parameters to data using UTF8 Encoding
NSString *postParams = @"api_key=APIKEY&email=example@example.com&password=password";
NSData *postData = [postParams dataUsingEncoding:NSUTF8StringEncoding];
// Convert POST string parameters to data using UTF8 Encoding
[urlRequest setHTTPMethod:@"POST"];
[urlRequest setHTTPBody:postData];
// Create dataTask
NSURLSessionDataTask *dataTask = [defaultSession dataTaskWithRequest:urlRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
// Handle your response here
];
// Fire the request
[dataTask resume];
斯威夫特
// Create the URLSession on the default configuration
let defaultSessionConfiguration = URLSessionConfiguration.default
let defaultSession = URLSession(configuration: defaultSessionConfiguration)
// Setup the request with URL
let url = URL(string: "yourURL")
var urlRequest = URLRequest(url: url!) // Note: This is a demo, that's why I use implicitly unwrapped optional
// Convert POST string parameters to data using UTF8 Encoding
let postParams = "api_key=APIKEY&email=example@example.com&password=password"
let postData = postParams.data(using: .utf8)
// Set the httpMethod and assign httpBody
urlRequest.httpMethod = "POST"
urlRequest.httpBody = postData
// Create dataTask
let dataTask = defaultSession.dataTask(with: urlRequest) (data, response, error) in
// Handle your response here
// Fire the request
dataTask.resume()
【讨论】：
NSURLSessionDataTask 行在 urlRequest 之前缺少一个冒号。 谢谢。很干净的答案。为什么该请求应该是可变的？什么可能变异？或者是因为你不断地附加（比如数组或字典）url，然后是method，然后是body，所以它必须是可变的？如果是这种情况，那么哪里需要使用NSURLRequest？
嘿 +1 解释一下你能告诉我如何将图像发送到服务器我所知道的只是 api 和密钥“图像”请帮助我很多教程但没有任何解释任何帮助将不胜感激：（
@Kuldeep1007tanwar 嗯，这真的取决于你的服务器，你可以尝试通过一个名为 PostMan 的工具来完成，当你最终看到你需要如何发送图像时，我可以帮助你 :)
它是一个 php 服务器，您有任何与 Postman 相关的参考资料吗？【参考方案3】：
您可以使用https://github.com/mxcl/OMGHTTPURLRQ
id config = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:someID];
id session = [NSURLSession sessionWithConfiguration:config delegate:someObject delegateQueue:[NSOperationQueue new]];
OMGMultipartFormData *multipartFormData = [OMGMultipartFormData new];
[multipartFormData addFile:data1 parameterName:@"file1" filename:@"myimage1.png" contentType:@"image/png"];
NSURLRequest *rq = [OMGHTTPURLRQ POST:url:multipartFormData];
id path = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"upload.NSData"];
[rq.HTTPBody writeToFile:path atomically:YES];
[[session uploadTaskWithRequest:rq fromFile:[NSURL fileURLWithPath:path]] resume];
【讨论】：
感谢您的链接。我不确定我是否理解关于这不是“清晰编码”的抱怨。如果您曾经不得不使用 NSURLSession 创建自己的多部分表单数据，您就会知道这可以为您节省大量的编码。在上面@mxcl 的示例中，创建请求只需要两行。要自己实现这一点，至少需要 12 行代码。 我刚刚意识到他们是如何设法构建多部分请求的。他们抓取要上传的文件并将其保存在其他文件中，其中也包含请求的正文。然后他们可以使用uploadTaskWithRequest:fromFile:。由于您不能使用任何 NSData 方法在后台上传，因此他们修改了实际文件。好点子。 backgroundSessionConfiguration 不允许自定义正文。您在请求对象的正文中放入的任何内容都会被忽略。【参考方案4】：Swift 2.0 解决方案来了：
let urlStr = “http://url_to_manage_post_requests”
let url = NSURL(string: urlStr)
let request: NSMutableURLRequest =
NSMutableURLRequest(URL: url!) request.HTTPMethod = "POST"
request.setValue(“application/json” forHTTPHeaderField:”Content-Type”)
request.timeoutInterval = 60.0
//additional headers
request.setValue(“deviceIDValue”, forHTTPHeaderField:”DeviceId”)
let bodyStr = “string or data to add to body of request”
let bodyData = bodyStr.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
request.HTTPBody = bodyData
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request)
(data: NSData?, response: NSURLResponse?, error: NSError?) -> Void in
if let httpResponse = response as? NSHTTPURLResponse
print("responseCode \(httpResponse.statusCode)")
if error != nil
// You can handle error response here
print("\(error)")
else
//Converting response to collection formate (array or dictionary)
do
let jsonResult: AnyObject = (try NSJSONSerialization.JSONObjectWithData(data!, options:
NSJSONReadingOptions.MutableContainers))
//success code
catch
//failure code
task.resume()
【讨论】：
【参考方案5】：如果您使用的是 Swift，Just 库会为您执行此操作。它的自述文件示例：
// talk to registration end point
Just.post(
"http://justiceleauge.org/member/register",
data: ["username": "barryallen", "password":"ReverseF1ashSucks"],
files: ["profile_photo": .URL(fileURLWithPath:"flash.jpeg", nil)]
) (r)
if (r.ok) /* success! */
【讨论】：
有趣，非常简单直接=D 我喜欢简单的图案【参考方案6】：Teja Kumar Bethina 为 Swift 3 更改了代码：
let urlStr = "http://url_to_manage_post_requests"
let url = URL(string: urlStr)
var request: URLRequest = URLRequest(url: url!)
request.httpMethod = "POST"
request.setValue("application/json", forHTTPHeaderField:"Content-Type")
request.timeoutInterval = 60.0
//additional headers
request.setValue("deviceIDValue", forHTTPHeaderField:"DeviceId")
let bodyStr = "string or data to add to body of request"
let bodyData = bodyStr.data(using: String.Encoding.utf8, allowLossyConversion: true)
request.httpBody = bodyData
let task = URLSession.shared.dataTask(with: request)
(data: Data?, response: URLResponse?, error: Error?) -> Void in
if let httpResponse = response as? HTTPURLResponse
print("responseCode \(httpResponse.statusCode)")
if error != nil
// You can handle error response here
print("\(error)")
else
//Converting response to collection formate (array or dictionary)
do
let jsonResult = (try JSONSerialization.jsonObject(with: data!, options:
JSONSerialization.ReadingOptions.mutableContainers))
//success code
catch
//failure code
task.resume()
【讨论】：
【参考方案7】： use like this.....
Create file
#import <Foundation/Foundation.h>`
#import "SharedManager.h"
#import "Constant.h"
#import "UserDetails.h"
@interface APISession : NSURLSession<NSURLSessionDelegate>
@property (nonatomic, retain) NSMutableData *responseData;
+(void)postRequetsWithParam:(NSMutableDictionary* )objDic withAPIName:(NSString*
)strAPIURL completionHandler:(void (^)(id result, BOOL status))completionHandler;
@end
****************.m*************************
#import "APISession.h"
#import <UIKit/UIKit.h>
@implementation APISession
+(void)postRequetsWithParam:(NSMutableDictionary *)objDic withAPIName:(NSString
*)strAPIURL completionHandler:(void (^)(id, BOOL))completionHandler
NSURL *url=[NSURL URLWithString:strAPIURL];
NSMutableURLRequest *request=[[NSMutableURLRequest alloc]initWithURL:url];
[request setHTTPMethod:@"POST"];
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
NSError *err = nil;
NSData *data=[NSJSONSerialization dataWithJSONObject:objDic options:NSJSONWritingPrettyPrinted error:&err];
[request setHTTPBody:data];
NSString *strJsonFormat = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"API URL: %@ \t Api Request Parameter ::::::::::::::%@",url,strJsonFormat);
// NSLog(@"Request data===%@",objDic);
NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: nil delegateQueue: [NSOperationQueue mainQueue]];
// NSURLSession *session=[NSURLSession sharedSession];
NSURLSessionTask *task=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error)
if (error==nil)
NSDictionary *dicData=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];\
NSLog(@"Response Data=============%@",dicData);
if([[dicData valueForKey:@"tokenExpired"]integerValue] == 1)
NSLog(@"hello");
NSDictionary *dict = [NSDictionary dictionaryWithObject:@"Access Token Expire." forKey:@"message"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"UserLogOut" object:self userInfo:dict];
dispatch_async(dispatch_get_main_queue(), ^
completionHandler(dicData,(error == nil));
);
NSLog(@"%@",dicData);
else
dispatch_async(dispatch_get_main_queue(), ^
completionHandler(error.localizedDescription,NO);
);
];
// dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^
[task resume];
// );
@end
*****************************in .your view controller***********
#import "file"
txtEmail.text = [txtEmail.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
[SVProgressHUD showWithStatus:@"Loading..."];
[SVProgressHUD setDefaultMaskType:SVProgressHUDMaskTypeGradient];
NSMutableDictionary *objLoginDic=[[NSMutableDictionary alloc] init];
[objLoginDic setValue:txtEmail.text forKey:@"email"];
[objLoginDic setValue:@0 forKey:kDeviceType];
[objLoginDic setValue:txtPassword.text forKey:kPassword];
[objLoginDic setValue:@"376545432" forKey:kDeviceTokan];
[objLoginDic setValue:@"" forKey:kcountryId];
[objLoginDic setValue:@"" forKey:kfbAccessToken];
[objLoginDic setValue:@0 forKey:kloginType];
[APISession postRequetsWithParam:objLoginDic withAPIName:KLOGIN_URL completionHandler:^(id result, BOOL status)
[SVProgressHUD dismiss];
NSInteger statusResponse=[[result valueForKey:kStatus] integerValue];
NSString *strMessage=[result valueForKey:KMessage];
if (status)
if (statusResponse == 1)
UserDetails *objLoginUserDetail=[[UserDetails alloc]
initWithObject:[result valueForKey:@"userDetails"]];
[[NSUserDefaults standardUserDefaults]
setObject:@(objLoginUserDetail.userId) forKey:@"user_id"];
[[NSUserDefaults standardUserDefaults] synchronize];
[self clearTextfeilds];
HomeScreen *obj=[Kiran_Storyboard instantiateViewControllerWithIdentifier:@"HomeScreen"];
[self.navigationController pushViewController:obj animated:YES];
else
[strMessage showAsAlert:self];
];
**********use model class for represnt data*************
#import <Foundation/Foundation.h>
#import "Constant.h"
#import <objc/runtime.h>
@interface UserDetails : NSObject
@property(strong,nonatomic) NSString *emailId,
*deviceToken,
*countryId,
*fbAccessToken,
*accessToken,
*countryName,
*isProfileSetup,
*profilePic,
*firstName,
*lastName,
*password;
@property (assign) NSInteger userId,deviceType,loginType;
-(id)initWithObject :(NSDictionary *)dicUserData;
-(void)saveLoginUserDetail;
+(UserDetails *)getLoginUserDetail;
-(UserDetails *)getEmptyModel;
- (NSArray *)allPropertyNames;
-(void)printDescription;
-(NSMutableDictionary *)getDictionary;
@end
******************model.m*************
#import "UserDetails.h"
#import "SharedManager.h"
@implementation UserDetails
-(id)initWithObject :(NSDictionary *)dicUserData
self = [[UserDetails alloc] init];
if (self)
@try
[self setFirstName:([dicUserData valueForKey:@"firstName"] != [NSNull null])?
[dicUserData valueForKey:@"firstName"]:@""];
[self setUserId:([dicUserData valueForKey:kUserId] != [NSNull null])?
[[dicUserData valueForKey:kUserId] integerValue]:0];
@catch (NSException *exception)
NSLog(@"Exception: %@",exception.description);
@finally
return self;
-(UserDetails *)getEmptyModel
[self setFirstName:@""];
[self setLastName:@""];
[self setDeviceType:0];
return self;
- (void)encodeWithCoder:(NSCoder *)encoder
// Encode properties, other class variables, etc
[encoder encodeObject:_firstName forKey:kFirstName];
[encoder encodeObject:[NSNumber numberWithInteger:_deviceType] forKey:kDeviceType];
- (id)initWithCoder:(NSCoder *)decoder
if((self = [super init]))
_firstName = [decoder decodeObjectForKey:kEmailId];
_deviceType= [[decoder decodeObjectForKey:kDeviceType] integerValue];
return self;
- (NSArray *)allPropertyNames
unsigned count;
objc_property_t *properties = class_copyPropertyList([self class], &count);
NSMutableArray *rv = [NSMutableArray array];
unsigned i;
for (i = 0; i < count; i++)
objc_property_t property = properties[i];
NSString *name = [NSString stringWithUTF8String:property_getName(property)];
[rv addObject:name];
free(properties);
return rv;
-(void)printDescription
NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
for(NSString *key in [self allPropertyNames])
[dic setValue:[self valueForKey:key] forKey:key];
NSLog(@"\n========================= User Detail ==============================\n");
NSLog(@"%@",[dic description]);
NSLog(@"\n=============================================================\n");
-(NSMutableDictionary *)getDictionary
NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
for(NSString *key in [self allPropertyNames])
[dic setValue:[self valueForKey:key] forKey:key];
return dic;
#pragma mark
#pragma mark - Save and get User details
-(void)saveLoginUserDetail
NSData *encodedObject = [NSKeyedArchiver archivedDataWithRootObject:self];
[Shared_UserDefault setObject:encodedObject forKey:kUserDefault_SavedUserDetail];
[Shared_UserDefault synchronize];
+(UserDetails *)getLoginUserDetail
NSData *encodedObject = [Shared_UserDefault objectForKey:kUserDefault_SavedUserDetail];
UserDetails *object = [NSKeyedUnarchiver unarchiveObjectWithData:encodedObject];
return object;
@end
************************usefull code while add data into model and get data********
NSLog(@"Response %@",result);
NSString *strMessg = [result objectForKey:kMessage];
NSString *status = [NSString stringWithFormat:@"%@",[result
objectForKey:kStatus]];
if([status isEqualToString:@"1"])
arryBankList =[[NSMutableArray alloc]init];
NSMutableArray *arrEvents=[result valueForKey:kbankList];
ShareOBJ.isDefaultBank = [result valueForKey:kisDefaultBank];
if ([arrEvents count]>0)
for (NSMutableArray *dic in arrEvents)
BankList *objBankListDetail =[[BankList alloc]initWithObject:[dic
mutableCopy]];
[arryBankList addObject:objBankListDetail];
//display data using model...
BankList *objBankListing =[arryBankList objectAtIndex:indexPath.row];
【讨论】：
不要使用-[NSUserDefaults synchronize]。来自Apple's documentation“这个方法是不必要的，不应该使用。”以上是关于使用 NSURLSession 发送 POST 请求的主要内容，如果未能解决你的问题，请参考以下文章
iOS开发网络篇—发送GET和POST请求（使用NSURLSession）
iOS开发网络篇—发送GET和POST请求（使用NSURLSession）
网络编程 利用NSURLSession发送GET POST请求