xcode 如何在模态视图控制器之间传递数据
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How to pass data between modal view controller
提问by user578386
This is a noob question.what i want is to pass data from my QuizViewcontroller to QuizModalViewController.i was successful in creating a normal modal view controller but having problem when passing data between the two..below is my code.
这是一个菜鸟问题。我想要的是将数据从我的 QuizViewcontroller 传递到 QuizModalViewController。我成功地创建了一个普通的模态视图控制器，但是在两者之间传递数据时遇到了问题......下面是我的代码。
QuizViewController
测验视图控制器
-(IBAction)button3Clicked:(id)sender
{
QuizModalViewController *mvid=[[QuizModalViewController alloc]initWithNibName:@"QuizModalViewController" bundle:nil];
mvid.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:mvid animated:YES];
}
QuizModalViewController
QuizModalViewController
- (IBAction)goBackToView
{
[self dismissModalViewControllerAnimated:YES];
//[controller loadQuestion:currentQuestionIndex+1];
}
回答by Eugene
-(IBAction)button3Clicked:(id)sender
{
QuizModalViewController *mvid=[[QuizModalViewController alloc]initWithNibName:@"QuizModalViewController" bundle:nil];
mvid.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
mvid.theDataYouWantToPass = theData; // this is how you do it
[self presentModalViewController:mvid animated:YES];
}
Note that theDataYouWantToPassmust be a property declared in the QuizModalViewController.hfile.
注意theDataYouWantToPass必须是QuizModalViewController.h文件中声明的属性。
回答by Christian Pappenberger
You can also use the -(void)prepareForSegue:... - Method to share data between controllers.
您还可以使用 -(void)prepareForSegue:... - 方法在控制器之间共享数据。
For Example:
例如：
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([segue.identifier isEqualToString:@"Your_Identifier"]) {
TestViewController *controller = [segue destinationViewController];
NSArray *array = [[NSArray alloc] initWithObjects:@"",nil];
controller.objectInTestViewController = array;
}
}
Hope this helps someone....
希望这可以帮助某人....
回答by Krumelur
Make your QuizModalViewControlleravailable at class scope instead of using a local variable.
Then in the goBackToView:you can access the controller's content prior to dismissing it.
使您QuizModalViewController在类范围内可用，而不是使用局部变量。然后，goBackToView:您可以在关闭控制器之前访问控制器的内容。
By the way: in your code you're leaking mvid. Release it after presenting it modally.
顺便说一句：在您的代码中，您正在泄漏mvid. 模态呈现后释放它。
