SpriteKit暂停和恢复SKView [英] SpriteKit Pause and Resume SKView

问题描述

我想在SpriteKit中暂停和取消暂停场景，同一位置有2个按钮。
场景运行时，我想显示暂停按钮。
当场景暂停时，我想隐藏暂停按钮并显示播放按钮。
在SpriteKit中，你可以使用在SpriteKit中定义的 self.scene.view.paused 。

I want to Pause and Unpause a Scene in SpriteKit, with 2 Buttons on the same position. While the Scene is running, I want to show the 'Pause' Button. While the Scene is paused, I want to hide the 'Pause' Button and show the 'Play' Button. In SpriteKit you can use self.scene.view.paused which is defined in SpriteKit.

我的代码：

@implementation MyScene {

SKSpriteNode *PauseButton;
SKSpriteNode *PlayButton;

}

-(id)initWithSize:(CGSize)size {
if (self = [super initWithSize:size]) {

[self Pause];

}
return self;
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
/* Called when a touch begins */

UITouch * touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];

SKNode * Node = [self nodeAtPoint:location];

if([Node.name isEqualToString:@"PauseButton"]){

    self.scene.view.paused = YES;

    [PauseButton removeFromParent];
    [self Resume];
}

if([Node.name isEqualToString:@"PlayButton"]){

    self.scene.view.paused = NO;

    [PlayButton removeFromParent];
    [self Pause];
}
}

-(void)Pause{

PauseButton = [SKSpriteNode spriteNodeWithImageNamed:@"Pause.png"];
PauseButton.position = CGPointMake(self.frame.size.width / 2, self.frame.size.height / 1.04);
PauseButton.zPosition = 3;
PauseButton.size = CGSizeMake(40, 40);
PauseButton.name = @"PauseButton";

[self addChild:PauseButton];

}

-(void)Resume{

PlayButton = [SKSpriteNode spriteNodeWithImageNamed:@"Play.png"];
PlayButton.position = CGPointMake(self.frame.size.width / 2, self.frame.size.height / 1.04);
PlayButton.zPosition = 3;
PlayButton.size = CGSizeMake(60, 60);
PlayButton.name = @"PlayButton";
[self addChild:PlayButton];

}

暂停场景，但仍有暂停按钮，如果我再次触摸暂停按钮，场景将恢复。所以现在只有图像不会改变。我该如何解决这个问题？

It pauses the Scene, but the there is still the Pause Button, and if I touch the Pause Button again, the Scene resumes. So now only the Images won't change. How can I fix this?

推荐答案

当SKView是时，您无法更新按钮（或场景中的任何其他内容）暂停。在 touchesBegan 方法中，您在更新按钮之前暂停视图（更改顺序将不起作用）。您需要返回运行循环，以便在暂停游戏之前更新按钮。这是一种方法：

You can't update the button (or anything else in the scene) while the SKView is paused. In your touchesBegan method, you are pausing the view before updating the button (changing the order won't work). You will need to return to the run loop so your button is updated before pausing the game. Here's one way to do that:

这会调用一种方法，在短暂延迟后暂停视图。在 touchesBegan 中的 [self Resume] 语句后添加此项，并删除 self.scene。 view.paused = YES 。

This calls a method to pause the view after a short delay. Add this after your [self Resume] statement in touchesBegan, and delete self.scene.view.paused = YES.

    [self performSelector:@selector(pauseGame) withObject:nil afterDelay:1/60.0];

此方法暂停SKView。将此添加到您的MyScene.m

This method pauses the SKView. Add this to your MyScene.m

- (void) pauseGame
{
    self.scene.view.paused = YES;
}

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