如何在SpriteKit中显示警报视图 [英] How to display alert view in SpriteKit

问题描述

我希望在我的SpriteKit游戏中显示UIAlertView（说没有足够的硬币来选择项目）。我在我的（仅）ViewController
中设置了 UIAlertView * alertView; 属性并对其进行了初始化。

I wish to display UIAlertView in my SpriteKit game (saying there is not enough coins to select an item). I have set UIAlertView *alertView; property in my (only) ViewController and initialized it.

但是我无法从我的场景中访问它（尝试调用公共方法，但它不起作用）。

However I can't access this from my Scene (tried to call a public method but it didn't work).

如何从场景中访问我的ViewController及其属性？

How can I access my ViewController and its properties form the scene?

推荐答案

关于如何访问ViewController （和它的属性）来自你的SKScene或任何SKNode，我会在创建后在这些SKNode中保存一个指针。

As to how to access the ViewController (and its properties) from your SKScene or any SKNode, I would save a pointer inside those SKNodes after creation.

@interface YourScene : SKScene
  @property (weak,nonatomic) UIViewController * presentingViewController;
@end

// inside the ViewController
YourScene * scene = [YourScene new];
scene.presentingViewController = self;    
[skView presentScene:scene];

标题问题的答案：在SpriteKit中显示alertViews

您不必在ViewController中放置 alertView 属性;你可以把它放在你的SKScene，或任何你喜欢的地方。您甚至不必设置委托，但如果您想让您的SKScene子类符合 UIAlertViewDelegate 协议。

An answer to your title question: Displaying alertViews in SpriteKit

You don't have to put the alertView property in your ViewController; you can just put it in your SKScene, or wherever you like. You don't even have to set a delegate, but if you want to just have your SKScene subclass conform to the UIAlertViewDelegate protocol.

@interface YourNode : SKNode<UIAlertViewDelegate>
  - (void) displayAlert;
@end

// ...

@implementation YourNode
  - (void) displayAlert {
    UIAlertView * alertView = [UIAlertView alloc] initWithTitle:@"Your title" message:@"Your message is this message" delegate:self cancelButtonTitle:@"Cancel me" otherButtonTitles:@"Whatever", nil];
    [alertView show];
  }
@end

这篇关于如何在SpriteKit中显示警报视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！