iPhone SDK：如何使用URL回傳數據？

Question

我在LightTableViewController.m讀取了plist數據

我加載這樣的數據：

    LOG RESULT:   
The Plist Data Is : (
        {
        category = 11;
        id = 1;
        name = "LIVING RM";
        status = 0;
    },
        {
        category = 11;
        id = 2;
        name = "BEDROOM RM";
        status = 0;
    }
)

我需要將“ id ”和“ status ”發回數據庫

控制打開或關閉哪個燈

這是我發布的方法，它在LightCell0.m

- (void)switchToggled:(id)sender {

    UISwitch *theSwitch = (UISwitch *)sender;
    UITableViewCell *cell = (UITableViewCell *)theSwitch.superview.superview;
    UITableView *tableView = (UITableView *)cell.superview;
    NSIndexPath *indexPath = [tableView indexPathForCell:cell];



    if(theSwitch.on) {
        NSURL * url;
        NSMutableURLRequest * request;  
        NSString *_urlString = @"http://10.85.28.99/req_light.php"; 
        url = [self smartURLForString:_urlString];
        request = [NSMutableURLRequest requestWithURL:url];
        [request setHTTPMethod:@"POST"];


            //This is my first post method,it is static,only get the indexPath,Not a real id and status I want to post back 
        NSString *post = [NSString stringWithFormat:@"lightcb%i=1", indexPath.row+1];
        NSData *postData = [ NSData dataWithBytes: [ post UTF8String ] length: [ post length ] ];
        [request setHTTPBody:postData];
        self.connection = [NSURLConnection connectionWithRequest:request delegate:self];
    } 
    else {
        NSURL * url;
        NSMutableURLRequest * request;
        NSString *_urlString = @"http://10.85.28.99/req_light.php";
        url = [self smartURLForString:_urlString];
        request = [NSMutableURLRequest requestWithURL:url];
        [request setHTTPMethod:@"POST"];


            //I got one error and one warring 
        //Error is "Request for member 'plist' in something not a structure or union"
            //Warning is 'NSString' may not resopnd to '+stringWithFormat:value=ForKey'
        NSString *post = [ NSString stringWithFormat:@"id=%i,status=0", 
                                  [[self.plist objectAtIndex:indexPath.row] valueForKey:@"id"]];
        NSData *postData = [ NSData dataWithBytes: [ post UTF8String ] length: [ post length ] ];
        [request setHTTPBody:postData];
        self.connection = [NSURLConnection connectionWithRequest:request delegate:self];

    }
}

所以...我的問題是

<1>如何回發兩個數據（使用“，”分隔兩個返回變量是否正確？

<2>如何消除錯誤“在非結構體或聯合體中請求成員'plist'”

萬分謝意

Answer 1

1）POST值與URL中的GET值一樣以'＆'分隔。

2）“請求成員” ...行告訴您您的成員不存在，或者至少未在此范圍內聲明，警告“ NSString可能沒有響應...”告訴您您正在嘗試調用NSString上的消息/方法，應該在另一個類上調用（NSDictionary是我的猜測）。