iOS开发往服务器Post一个json数据

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。

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