Question

我有一些代码在委托中显示两个UIViewController。

RootViewController.m

request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:@"***some https url here ***"]];
// custom implementation of NSURLConnectionDelegate
dataman = [[DataManager alloc] initWithParentcontroller:self]; 
mainConn = [[NSURLConnection alloc] initWithRequest:request delegate:dataman];

在AuthenticationViewController.h中

@protocol ShowAuthenticationWindowDelegate <NSObject>
@required
- (void) onFinishedEnteringCredentials:(NSURLCredential*)credentials;
- (void) onCancelAuthentication;
@end

在AuthenticationViewController.m中

- (IBAction) onClickLogin:(id)sender;
{
    ....
    // authDelegate => id <ShowAuthenticationWindowDelegate>
    [authDelegate onFinishedEnteringCredentials:credentials];
    [self dismissModalViewControllerAnimated:YES];
    ....
}

DataManger.h中的

（DataManager类）实现了NSURLConnectionDelegate和ShowAuthenticationWindowDelegate。

在Datamanager.m中在didReceiveAuthenticationChallenge委托功能中，我将AuthentiationViewController显示为收集用户名/密码的模式对话框。

-(void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
    AuthenticationViewController *authview = [[AuthenticationViewController alloc] initWithNibName:@"AuthenticationViewController" bundle:[NSBundle mainBundle]];
    authview.modalPresentationStyle = UIModalPresentationFullScreen;
    authview.modalTransitionStyle   = UIModalTransitionStyleFlipHorizontal;
    authview.credentialsDelegate = self;
    [rootController presentModalViewController:authview animated:YES];
}

在这里，我展示了UIViewController，它是视图中的活动指示符。在我通过名为AuthenticationViewController的其中一个登录按钮事件处理程序中解除之前的dismissModalViewController对话框后，我以模态方式显示它。在发送带有挑战对象的凭证（之前已缓存）后，我以模态方式显示ActivityViewController，但无论我做什么都不显示。我试图显示UIAlertView有效，但我的activityviewcontroller没有显示。我检查了参数和对象一切都是有效的。代表连线！所有代码都被调用但对话框未显示。

可能是我遗失了什么???

- (void) onFinishedEnteringCredentials:(NSURLCredential*)credentials;
{

    [[authChallenge sender] useCredential:credentials forAuthenticationChallenge:authChallenge];
    // create an activity modal dialog 
    if (activityController == nil) {
        activityController = [[ActivityViewController alloc] initWithNibName:@"ActivityViewController" bundle:[NSBundle mainBundle]];
        activityController.modalPresentationStyle = UIModalPresentationFullScreen;
        activityController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    }
    [rootController presentModalViewController:activityController animated:YES];
}

Answer 1

我已经找到了解决方案，如果有人想要背靠背显示两个模态对话框，你应该在被解雇的控制器上将“animated”参数设置为“NO”。在下一个控制器显示“presentViewController”功能时，似乎没有完成动画转换。

在删除函数中以模态方式显示Viewcontrollers

1 个答案: