iOS开发往服务器Post一个json数据

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有时候需要往服务器Post一个json数据。

参数

参数可以被自动序列号。前提是要是iOS里面的数据类型，比如NSDictionary,NSArray,NSNumber,NSString等。如果是自己的模型数组，可以自己写一个模型的ToString方法，网上似乎也有些库，不过自己写起来也不麻烦。
比如我传的是一个联系人数组。

@interface ContactModel : NSObject@property (nonatomic, strong) NSString *name;@property (nonatomic, strong) NSString *contact_phone;@property (nonatomic, strong) NSString *created_at;- (NSString *)modelToString;@end- (NSString *)modelToString{    return [NSString stringWithFormat:@"{\"contact_phone\":\"%@\", \"name\":\"%@\", \"source\":1, \"created_at\":\"%@\"}",_contact_phone,_name,_created_at];}@end

然后往模型里面添加数组之前。先调用modelToString进行序列号就好。
参数里面可以直接使用数组。
比如

   NSMutableArray *array =  [ContactsHelper contactArray];   NSDictionary *parmeters = @{@"user_id":@"2222",                             @"contact":array                             };

请求

使用原生的http请求。

-(void)request: (NSString*)httpUrl withHttpArg: (NSDictionary*)parameters{    NSURL *url = [NSURL URLWithString: httpUrl];    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL: url cachePolicy: NSURLRequestUseProtocolCachePolicy timeoutInterval: 10];    [request setHTTPMethod: @"POST"];    if (parameters) {        if (![mutableRequest valueForHTTPHeaderField:@"Content-Type"]) {            [mutableRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];        }        [mutableRequest setHTTPBody:[NSJSONSerialization dataWithJSONObject:parameters options:self.writingOptions error:error]];    }    [NSURLConnection sendAsynchronousRequest: request                                       queue: [NSOperationQueue mainQueue]                           completionHandler: ^(NSURLResponse *response, NSData *data, NSError *error){                               if (error) {                                   NSLog(@"Httperror: %@%ld", error.localizedDescription, error.code);                               } else {                                   NSInteger responseCode = [(NSHTTPURLResponse *)response statusCode];                                   NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];                                   NSLog(@"HttpResponseCode:%ld", responseCode);                                   NSLog(@"HttpResponseBody %@",responseString);                                   NSJSONSerialization *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];                                   NSDictionary *dicjson = (NSDictionary *)json;                                   dispatch_async(dispatch_get_main_queue(), ^{                                       //刷新UI                                   });                               }                           }];}

使用AFNetWorking。

NSMutableURLRequest *request = [[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString: parameters:parmeters error:nil];  [NSURLConnection sendAsynchronousRequest: request                                       queue: [NSOperationQueue mainQueue]                           completionHandler: ^(NSURLResponse *response, NSData *data, NSError *error){                               if (error) {                                   NSLog(@"Httperror: %@%ld", error.localizedDescription, error.code);                               } else {                                   NSInteger responseCode = [(NSHTTPURLResponse *)response statusCode];                                   NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];                                   NSLog(@"HttpResponseCode:%ld", responseCode);                                   NSLog(@"HttpResponseBody %@",responseString);                                   NSJSONSerialization *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];                                   NSDictionary *dicjson = (NSDictionary *)json;                                   NSLog(@"%@",dicjson);                                   dispatch_async(dispatch_get_main_queue(), ^{                                       //刷新UI                                   });                               }                           }];

推荐使用AFNetworking。自己的话还需要加一些其它的设置，具体我还要研究。

博客地址 iseedog

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