ios 如何调用presentViewController？
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How to call presentViewController?
提问by Gary
Here is the situation: I have a class MainView (which is a UIViewController) and call from it an UIActionSheetDelegate class. I want to use the method presentViewController, but the following code does not work (currently being called in the ActionSheet class):
这是情况：我有一个类 MainView（它是一个 UIViewController）并从中调用一个 UIActionSheetDelegate 类。我想使用presentViewController方法，但是下面的代码不起作用（当前在ActionSheet类中被调用）：
[self presentViewController:myViewController animated:YES];
I am a little confused regarding where I should call the method from (MainView or the ActionSheetDelegate).
我对应该从哪里调用方法（MainView 或 ActionSheetDelegate）感到有些困惑。
Thanks in advance.
提前致谢。
回答by Jesse Naugher
You call the method onthe UIViewController that is your MainView, and passit your UIViewController you want to be the ActionSheet.
您在作为您的 MainView 的 UIViewController上调用该方法，并将您希望成为 ActionSheet 的 UIViewController传递给它。
[mainViewController presentViewController:actionSheetController animated:YES];
To dismiss the UIActionSheet, dimissWithClickedButtonIndex:animated:is a method for the UIActionSheet that you can implement. The method can be called by whoever (so if you want to dismiss it from your mainview have a reference to the action sheet and do something like [self.myActionSheet dismissWithClickedButtonIndex:0 animated:YES];
要关闭 UIActionSheet，dimissWithClickedButtonIndex:animated:是您可以实现的 UIActionSheet 方法。该方法可以由任何人调用（因此，如果您想从主视图中关闭它，请参考操作表并执行类似的操作[self.myActionSheet dismissWithClickedButtonIndex:0 animated:YES];
The method is also called whenever the 'cancel' button is clicked by the user.
每当用户单击“取消”按钮时，也会调用该方法。
