[WTRequestCenter getWithURL:url
                 parameters:parameters
          completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
              id obj = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&jsonError];
              NSLog(@"result:%@",obj);
              }

[WTRequestCenter postWithURL:url
                  parameters:parameters 
           completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
                     id obj = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&jsonError];
              NSLog(@"result:%@",obj);
               }

    NSURL *url = [NSURL URLWithString:@"http://www.xxx.com/eqdsa.jpg"];
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectZero];
    [WTRequestCenter getImageWithURL:url imageComplectionHandler:^(UIImage *image) {
        imageView.image = image;
    }];