需要將JSON格式的數據傳送給服務器，注意需要設置： [request setValue:@”application/json” forHTTPHeaderField:@”Content-Type”];
Content-Type類型為：application/json
// 1.URL
NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/order"];// 2.請求
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];// 3.請求方法
request.HTTPMethod = @"POST";// 4.設置請求體（請求參數）
// 創建一個描述訂單信息的JSON數據
NSDictionary *orderInfo = @{@"shop_id" : @"1243324",@"shop_name" : @"啊哈哈哈",@"user_id" : @"899"};
NSData *json = [NSJSONSerialization dataWithJSONObject:orderInfo options:NSJSONWritingPrettyPrinted error:nil];
request.HTTPBody = json;// 5.設置請求頭：這次請求體的數據不再是普通的參數，而是一個JSON數據
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];// 6.發送請求
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {if (data == nil || connectionError) return;NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];NSString *error = dict[@"error"];if (error) {[MBProgressHUD showError:error];} else {NSString *success = dict[@"success"];[MBProgressHUD showSuccess:success];}
}];
)
)
