首页 文章

iOS视图不在窗口层次结构中的iOS

提问于
浏览 次
2

While i am Moving From PassCode Controller to OTP ViewController, iam getting the following error in console:

警告：尝试在<PassCodeController：0x1ec3e000>上显示<OTPController：0x1e56e0a0>，其视图不在窗口层次结构中！

This is the code I'm using to change between views:

UIStoryboard  *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    OTPViewController *lOTPViewController = [storyboard instantiateViewControllerWithIdentifier:@"OTPViewController"];
    lOTPViewController.comingFromReg = true;

    [self presentViewController:lOTPViewController animated:YES
                     completion:nil];

i am presenting PassCode Controller From RegistrationViewController:

UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
        PassCodeViewController *passVC =  [storyboard instantiateViewControllerWithIdentifier:@"PassCodeViewController"];
        [self presentViewController:passVC animated:YES completion:nil];
ios objective-c uiview uinavigationcontroller presentviewcontroller

3 回答

  • 3

    这是因为两个viewcontroller同时存在和解除，或者你试图在viewcontroller打开 ViewDidload 方法时立即呈现ViewController所以

    First:

    • 显示来自 viewDidAppear 方法的ViewController或代替 ViewDidload .

    Second:

    我建议使用完成方法当前和解除viewcontrolelr如下例：

    [self presentViewController:lOTPViewController animated:YES
                             completion:^{

        }];

    UPDATE:

    创建一个单独的方法来呈现OTPViewController，如下所示：

    -(void)PresentOTPViewController
{

    UIStoryboard  *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    OTPViewController *lOTPViewController = [storyboard instantiateViewControllerWithIdentifier:@"OTPViewController"];
    lOTPViewController.comingFromReg = true;

    [self presentViewController:lOTPViewController animated:YES
                     completion:^{}];

}

    现在使用 performSelector 用1秒Delaya调用此方法

    [self performSelector:@selector(PresentOTPViewController) withObject:self afterDelay:1.0 ];

    您需要在上面执行selectselect代码

    [self dismissViewControllerAnimated:YES completion:^{
 [self performSelector:@selector(PresentOTPViewController) withObject:self afterDelay:1.0 ];
}]; // this is the dismiss method of PassCodeViewController

    Ť

    回复于
  • 2

    尝试从rootViewController呈现它，

    [self.view.window.rootViewController presentViewController:lOTPViewController animated:YES completion:nil];

    回复于
  • 1

    使用下面的代码行..

    // you need to create UIStoryboard object by giving name of your storyboard
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
// here you need to create storyboard ID of perticular view where you need to navigate your app 
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:@"viewContIdentifire"];

// if use presentViewController this will not enables you to go back to previous view
[self presentViewController:vc animated:NO completion:nil];
                        **// OR**
// using pushViewController lets you to go back to the previous view
[self.navigationController pushViewController:vc animated:YES];
    回复于

相关问题