ios - 如何使用UIViewController将数据传递到ViewController

如何使用此代码将数据传递到ViewController？

UIStoryboard *main = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

UIViewController *vc = [main instantiateViewControllerWithIdentifier:@"Catalog"];

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

我想将示例中的数据传递给itemId，如下所示:

ViewController *vc = [[ViewController alloc] initWithNibName:nil bundle:nil];

vc.itemId = 0;

[[[[UIApplication sharedApplication] keyWindow] rootViewController] presentViewController:vc animated:YES completion:nil];

最佳答案

如果是UIViewController，则键入cast您的ViewController

ViewController *vc = (ViewController*)[main instantiateViewControllerWithIdentifier:@"Catalog"];
vc.itemId = 0;
[self presentViewController:vc animated:YES completion:nil];

关于ios - 如何使用UIViewController将数据传递到ViewController，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/23384502/