Question

UIAlertView在传递另一个视图时延迟或不显示。任何帮助将不胜感激。

-(void)viewDidLoad{
  levelContentController = [[UIAlertView alloc] initWithTitle:@""
                                                      message:@"Loading...
                                                     delegate:self
                                            cancelButtonTitle:nil
                                            otherButtonTitles:nil];
}
-(void)passToTestView:(id)sender{
[levelContentController show];
ViewController *viewController = [[ViewController alloc]init];
clickedLevelId = [[NSString alloc] init];
clickedLevelId = [testIdStringArray objectAtIndex:[sender tag]-1];
[viewController sendIndexMethod:sendIndex];
[viewController testCompletedArrayMethod:arrayOfCompletedTest];
[viewController parseTestURL:buttonTag getTestIdString:clickedLevelId];
viewController.viewSoundCheck = _levelSoundCheck;
[self presentViewController:viewController animated:YES completion:nil];

}

-(void)viewWillDisappear:(BOOL)animated{
    [levelContentController dismissWithClickedButtonIndex:0 animated:YES];
}

Answer 1

以上代码存在一些问题。

调用viewWillDisappear:选择器时，它会尝试显示alertView。但在同一方法中，您尝试呈现另一个视图控制器。

这将依次调用ViewController隐藏alertView。

如果您希望在显示UIAlertView时显示alertView，请在ViewController班级viewDidLoad或viewWillAppear:中创建并显示$data = $_POST['carData']; $params = []; $updateString = ""; foreach ($data as $key => $value) { if($key != "id")$updateString .= $key." = :".$key.","; $params[':'.$key] = $value; } $updateString = rtrim($updateString, ","); //remove last , $stmt = $pdo->prepare("UPDATE cars SET ".$updateString." WHERE id = :id"); $stmt->execute($params);个实例。不要在此viewController中初始化并显示它。

Answer 2

要显示UIAlertView，您应该致电：

[contentLoadingController show];

请注意，iOS9中不推荐使用UIAlertView，您应该使用UIAlertController。

从另一个视图调用方法时，UIAlertView延迟或不显示

2 个答案: