Question

我正在构建一个应用程序，我差不多完成了。

麻烦的是：我有一个for循环，其中两个if语句无法正常工作，我只是看不出有什么问题。

以下是代码：

for (Tickets *items in _feedItems){
    if ([resultText.text isEqual:(id) items.ticketNumber]) {
        if ([items.ticketDate isEqualToString: @"0"]) {

            status.text = @“YES”;


            NSString *date = resultText.text;
            NSMutableString *postString = [NSMutableString     
                                              stringWithString:kPostURL];
            [postString appendString:[NSString stringWithFormat:@"?%@=%@", kDate, 
                                               date]];
            [postString setString:[postString 
                                      stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
            NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:
                                                                            [NSURL URLWithString:postString]];
            [request setHTTPMethod:@"POST"];
            postConnection = [[NSURLConnection alloc] initWithRequest:request 
                                                      delegate:self startImmediately:YES];


            UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" 
                                                     bundle:nil];
            UIViewController *View = [storyboard 
                                         instantiateViewControllerWithIdentifier:@"Approved"];

            [self presentViewController:View animated:NO completion:NULL];

        }
        break;

    }
    else {
        status.text = @“NO”;

        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" 
                                                 bundle:nil];
        UIViewController *View = [storyboard 
                                     instantiateViewControllerWithIdentifier:@"NotApproved"];

        [self presentViewController:View animated:NO completion:NULL];
    }
 }

这段代码总是把我引向ViewController NotApproved，而且永远不会引用我认可的ViewController;即使它被批准并且执行了对数据库的POST。

任何帮助都是非常有用的！

Answer 1

if ([resultText.text isEqual:(id) items.ticketNumber])问题在这里，您正在将字符串与id进行比较。 id可以是String，Array，Dictionary等。首先转换为文本，然后进行比较，否则每次都会抛出错误。

objective c - for循环，带有两个if语句

1 个答案: