Mysql 将NSURLConnection替换为NSURLSession以下载和解析json提要

我是在iOS上使用数据库领域的初学者。然而，我可以找到一种连接MySQL数据库、下载和解析json提要的方法。现在在iOS 9中，我不能再使用NSURLConnection了，这就是为什么我必须用NSURLSession替换它。例如，我在这里看到了许多教程。到目前为止，我还无法更换它。因为时间紧迫，我不能再浪费时间了。有人能帮我更换吗

我的代码看起来就像这样：

- (void)downloadItems
{
    // Download the json file
    NSURL *jsonFileUrl = [NSURL URLWithString:@"http://myhost.ch/test.php"];

    // Create the request
    NSURLRequest *urlRequest = [[NSURLRequest alloc] initWithURL:jsonFileUrl];

    // Create the NSURLConnection
    [NSURLConnection connectionWithRequest:urlRequest delegate:self];

}

#pragma mark NSURLConnectionDataProtocol Methods

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    // Initialize the data object
    _downloadedData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    // Append the newly downloaded data
    [_downloadedData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    // Create an array to store the locations
    NSMutableArray *_locations = [[NSMutableArray alloc] init];

    // Parse the JSON that came in
    NSError *error;
    NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:_downloadedData options:NSJSONReadingAllowFragments error:&error];

    // Loop through Json objects, create question objects and add them to our questions array
    for (int i = 0; i < jsonArray.count; i++)
    {
        NSDictionary *jsonElement = jsonArray[i];

        // Create a new location object and set its props to JsonElement properties
        Location *newLocation = [[Location alloc] init];
        newLocation.idS = jsonElement[@"idStatistic"];
        newLocation.temp = jsonElement[@"temp"];
        newLocation.hum = jsonElement[@"hum"];
        newLocation.date_time = jsonElement[@"date_time"];

        // Add this question to the locations array
        [_locations addObject:newLocation];
    }

    // Ready to notify delegate that data is ready and pass back items
    if (self.delegate)
    {
        [self.delegate itemsDownloaded:_locations];
    }
}

-（无效）下载项目
{
//下载json文件
NSURL*jsonFileUrl=[NSURL URLWithString:@”http://myhost.ch/test.php"];
//创建请求
NSURLRequest*urlRequest=[[NSURLRequest alloc]initWithURL:jsonFileUrl]；
//创建NSURLConnection
[nsurlConnectionConnectionWithRequest:urlRequest委托：self]；
}
#pragma标记NSURLConnectionDataProtocol方法
-（void）连接：（NSURLConnection*）连接DidReceiverResponse：（NSURResponse*）响应
{
//初始化数据对象
_下载数据=[[NSMutableData alloc]init]；
}
-（void）连接：（NSURLConnection*）连接didReceiveData:（NSData*）数据
{
//附加新下载的数据
[_下载数据appendData:data]；
}
-（无效）连接IDFinishLoading:（NSURLConnection*）连接
{
//创建一个数组来存储位置
NSMUTABLEARRY*_位置=[[NSMUTABLEARRY alloc]init]；
//解析传入的JSON
n错误*错误；
NSArray*jsonArray=[NSJSONSerialization JSONObjectWithData:\u下载数据选项：NSJSONReadingAllowFragments错误：&错误]；
//循环浏览Json对象，创建问题对象并将它们添加到我们的问题数组中
for（int i=0；i

您可以试试这个

{ NSURL*url=[NSURL URLWithString:@''

}

NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];

[theRequest setHTTPMethod:@"POST"];

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

                                  responseDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
                                  NSLog(@"Result:%@", responseDict);
                              }];
[task resume];