UICollectionView Tap事件

Question

我在一个UICollectionView中创建了一个ViewController。我的UiCollectionViewCell包含一个图像视图和一个标签。看起来处理点击事件真的很糟糕。我需要点击很多次，然后它才会对点击做出反应。通常情况下，它只在双击时才这样做。

- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath
{


    NSString *urlString2 =  [NSString stringWithFormat:@"http://ratemyplays.com/songs.php?listid=%d", indexPath.row];
    NSMutableURLRequest *request2 = [[NSMutableURLRequest alloc]init];
    [request2 setTimeoutInterval:20.0];
    [request2 setURL:[NSURL URLWithString:urlString2]];
    [request2 setHTTPMethod:@"POST"];

    NSString *PHPArray = [[NSString alloc] initWithData:[NSURLConnection sendSynchronousRequest:request2 returningResponse:nil error:nil] encoding:NSUTF8StringEncoding];

    NSArray *playArray2 = [PHPArray componentsSeparatedByString:@"."];

    if ([playArray2 count] <2) {
        UIAlertView *alert2 = [[UIAlertView alloc] initWithTitle:@"This Playlist is empty!!" message:@"We're Currently modifying it" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

        [alert2 show];
    } else {
        YouTubeTableViewController *youTubeTableViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"YouTubeTableViewController"];
        youTubeTableViewController.selectedRowValue=indexPath.row;
        [self.navigationController pushViewController:youTubeTableViewController animated:YES];
        youTubeTableViewController.titleName = scoreArray;
        youTubeTableViewController.playlistId = scoreArray2;
}


}

这是正常的行为还是我遗漏了什么？

Answer 1

当单击单元格时，您正在执行同步请求，这可能会导致您不得不多次单击的“感觉”。我建议您将NSURLConnection同步请求更改为异步请求。如下所示：

[NSURLConnection sendAsynchronousRequest:request
                                   queue:[[NSOperationQueue alloc] init]
                       completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
 {

     if (error == nil)
     {
         NSString *PHPArray = =[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
         NSLog(@"data received from url: %@", PHPArray);
         if ([playArray2 count] <2) {
             UIAlertView *alert2 = [[UIAlertView alloc] initWithTitle:@"This Playlist is empty!!" message:@"We're Currently modifying it" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

             [alert2 show];
         } else {
             YouTubeTableViewController *youTubeTableViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"YouTubeTableViewController"];
             youTubeTableViewController.selectedRowValue=indexPath.row;
             [self.navigationController pushViewController:youTubeTableViewController animated:YES];
             youTubeTableViewController.titleName = scoreArray;
             youTubeTableViewController.playlistId = scoreArray2;
         }

     }
     else if (error != nil && error.code == NSURLErrorTimedOut)
     {
         NSLog(@"error code: %ld", (long)error.code);
     }
     else if (error != nil)
     {
         NSLog(@"error code: %ld", (long)error.code);
     }
 }];