如何将粒子效果添加到使用 iOS 7 SpriteKit 粒子的非游戏的 iOS 应用程序?

问题描述

我需要向我的应用程序添加雨粒子效果，我一直很难找到实际执行这个想法的方法.

I need to add a rain particle effect to my app, I have been having a tough time finding ways to actually execute this idea.

我尝试遵循此 CALayer 方法教程:链接 但我不太确定这是否是最好的方法，考虑到新的 iOS 7 SpriteKit 粒子发射器在 Xcode 5 中可用.

I tried following this CALayer approach tutorial : Link but I am not quite sure if this is the best approach, considering the new iOS 7 SpriteKit Particle Emitter available in Xcode 5.

我已经创建了 .sks 文件并且它在我的层次结构中，但我仍然无法将它添加到我的故事板/项目中.

I have already created the .sks file and it's in my Hierarchy, but I am still unable to add it to my storyboard / project.

话虽如此，我究竟如何将 SpriteKit 粒子 (sks) 添加到我的视图中?我对 SpriteKit 框架中的场景、分层等完全不熟悉，因为我不是游戏开发人员.我需要尽可能多的详细信息和示例代码，以便我可以解决这个问题

With that being said, How exactly do I add a SpriteKit Particle (sks) to my view? I am not at all familiar with scenes, layering , etc in the SpriteKit framework as I am not a game developer.I need the most details and sample code possible so that I can figure this out please

更新:我已按照 SO 成员的回答中提供的指示进行操作:AyatollahAndy，请参阅下面的回答.虽然我能够在我的 view 中显示 SKScene，但当收到任何触摸事件时，应用程序会崩溃.我得到以下信息:

UPDATE:I have followed the direction provided in an answer by fellow SO member: AyatollahAndy, please see his answer below. Although I was able to display the SKScene in my view the app crashes when any touch event is received. I get the following:

谢谢

推荐答案

在你的 UIView 中创建一个 SKScene 来添加一个 SKEmitterNode 粒子效果.

Create a SKScene in your UIView to add a SKEmitterNode particle effect.

一种方法:

1.在情节提要中(或者如果您愿意，可以通过编程方式)在现有视图之上添加一个视图对象，并根据您的需要调整其大小.
2.将新视图的类改为SKView
3.在你的视图控制器.h文件中为SKView创建一个属性:

1.In storyboard (or programatically if you prefer) add a View object on top of the existing View and resize it to your needs.
2.Change the class of the new view to SKView
3.In your view controller .h file create a property for the SKView:

@property IBOutlet SKView *skView;

4. 将故事板上的 SKView 链接到 skView 属性.
5.创建一个新类，子类化SKScene.MyScene.h 看起来像:

4.Link the SKView on your storyboard to the skView property.
5.Create a new class, subclassing SKScene. MyScene.h will look like:

#import <SpriteKit/SpriteKit.h>
@interface MyScene : SKScene
@end

下面的 MyScene.m 包含用于在触摸 SKView 时随时随地创建粒子效果的代码.

MyScene.m below contains code to create a particle effect whenever and wherever the SKView is touched.

#import "MyScene.h"

@implementation MyScene

-(id)initWithSize:(CGSize)size {
    if (self = [super initWithSize:size]) {
        /* Setup your scene here */

        self.backgroundColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];
        SKLabelNode *myLabel = [SKLabelNode labelNodeWithFontNamed:@"Chalkduster"];
        myLabel.text = @"Hello, World!";
        myLabel.fontSize = 30;
        myLabel.position = CGPointMake(CGRectGetMidX(self.frame),
                                   CGRectGetMidY(self.frame));

        [self addChild:myLabel];
    }
    return self;
}

//particle explosion - uses MyParticle.sks
- (SKEmitterNode *) newExplosion: (float)posX : (float) posy
{
    SKEmitterNode *emitter =  [NSKeyedUnarchiver unarchiveObjectWithFile:[[NSBundle mainBundle] pathForResource:@"MyParticle" ofType:@"sks"]];
    emitter.position = CGPointMake(posX,posy);
    emitter.name = @"explosion";
    emitter.targetNode = self.scene;
    emitter.numParticlesToEmit = 1000;
    emitter.zPosition=2.0;
    return emitter;
}

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

    for (UITouch *touch in touches) {
        CGPoint location = [touch locationInNode:self];
        //add effect at touch location
        [self addChild:[self newExplosion:location.x : location.y]];
    }
}

-(void)update:(CFTimeInterval)currentTime {
    /* Called before each frame is rendered */
}

@end

6.在你的主视图控制器中，包含你的场景类:

6.In your main view controller, include your scene class:

#import "MyScene.h"

并向 viewDidLoad 添加代码以初始化 SKView:

and add code to viewDidLoad to initialise the SKView:

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Configure the SKView
    SKView * skView = _skView;
    skView.showsFPS = YES;
    skView.showsNodeCount = YES;

    // Create and configure the scene.
    SKScene * scene = [MyScene sceneWithSize:skView.bounds.size];
    scene.scaleMode = SKSceneScaleModeAspectFill;

    // Present the scene.
    [skView presentScene:scene];
}

然后你应该在你的主 UIView 中有一个有效的 SKScene.

You should then have a working SKScene within your main UIView.

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