SKSpriteNode，添加到父钩子/从父钩子中删除 [英] SKSpriteNode, added to/removed from parent hook

问题描述

当 SKSpriteNode(或 SKNode)被添加到父节点或从父节点移除时，类中是否有任何(最佳实践)方法来挂钩事件?

Is there any (best practice) way within the class to hook the events when a SKSpriteNode (or SKNode) is added onto and removed from a parent node?

推荐答案

不需要 Kobold Kit，您可以子类化一个 SKSpriteNode(或任何 SKNode 实际上)并扩展 removeFromParentSKNodes拥有的功能.

Without the need of Kobold Kit, you can sub-class a SKSpriteNode (or any SKNode for the fact) and extend the removeFromParent function that SKNodes own.

例如:

FLSprite.m:

#import "FLSprite.h"

@implementation FLSprite

-(void)removeFromParent {
    [super removeFromParent];
    NSLog(@"I print when I'm Removed");
    //here's where you'll add your hooking functions
}

@end

MyScene.m:

-(id)initWithSize:(CGSize)size {    
    if (self = [super initWithSize:size]) {
    FLSprite* sprite = [FLSprite spriteNodeWithColor:[UIColor blackColor] size:CGSizeMake(200, 100)];
        [sprite setPosition:CGPointMake(100.0, 50.0)];
        [self addChild:sprite];
        [sprite removeFromParent];

    }
    return self;
}

至于添加一个孩子，因为你添加了一个孩子(在大多数情况下)[self addChild:node]; 你需要扩展 addChild在您要添加的视图中.例如，您将在 MyScene.m 中添加以下内容，因为我们正在将精灵添加到该视图中

As for adding a child, since you add a child as such (in most cases) [self addChild:node]; you'll need to extend the addChild in the view you are adding to. For example you'll add the following to your MyScene.m, since we are adding the sprite to that view

-(void)addChild:(SKNode *)node {
    [super addChild:node];
    NSLog(@"added child");
}

<小时>

正如他在帖子中解释的那样，这几乎就是 Steffen Itterheim 为实现此功能所做的工作.

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This is pretty much what Steffen Itterheim did to acheive this functions, as he explained in his posting.

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