我需要实现一个可以多次使用的功能

Question

我有一个 swift 函数，我想转换为目标 C，谁能帮我转换它？任何帮助将不胜感激

     func getdata(_ send: NSString)
    {

        let url=URL(string:send as String)
        do
        {
            let allContactsData = try Data(contentsOf: url!)
            let allContacts = try JSONSerialization.jsonObject(with: allContactsData, options: JSONSerialization.ReadingOptions.allowFragments) as! [String : AnyObject]
            print(allContacts)
            if let musicJob = allContacts["Attendance"] as? [Any], !musicJob.isEmpty
            {
                print(musicJob)
                dataArray = allContacts["Attendance"] as! NSArray
                print(dataArray)

            }
}
           { let send: String = String(format:"http://182.18.182.91/RaosMobileService/Service1.svc/GetStudentAttendance_ByMonth/%@/%@/1/%d/2017",loadedUserName,studentId,row+1)
            self.getdata(send as NSString)
}

如何将其转换为目标 C，请提供任何帮助。我需要使用这个 func getdata(_ send: NSString) 多次

Answer 1

Objective-c中的

NSJSONSerialization

尝试1：如果Json返回数组

 -(void)getdata:(NSString *)send
    {
        NSURL *url = [[NSURL alloc]initWithString:send];
        NSData *data = [[NSData alloc] initWithContentsOfURL:url];

        NSError *e = nil;
        NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error: &e];

        if (!jsonArray) {
            NSLog(@"Error parsing JSON: %@", e);
        } else {
            for(NSDictionary *item in jsonArray) {
                NSLog(@"Item: %@", item);
            }
        }
    }

尝试 2：如果 Json 返回字典

-(void)getdata:(NSString *)send
{
    NSURL *url = [[NSURL alloc]initWithString:send];
    NSData *data = [[NSData alloc] initWithContentsOfURL:url];

    NSDictionary *res     = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves|| NSJSONReadingMutableContainers error:nil];
    NSLog(@"%@",res);
 }

调用方法：

  NSString *send = [NSString stringWithFormat:@"http://182.18.182.91/RaosMobileService/Service1.svc/GetStudentAttendance_ByMonth/%@/%@/1/%d/2017"];
    [self getdata:send];