SpriteKit 的相机抖动效果 [英] A camera shake effect for SpriteKit

问题描述

有谁知道一些开箱即用的库，它们可能会为 SKNode 提供相机抖动等效果?

Does anyone know some out of the box libraries that might provide effects such as camera shake to an SKNode?

如果没有，有没有一种简单的方法可以使用动作来实现相机抖动?

If not is there an easy way to implement a camera shake using actions?

谢谢

推荐答案

我发现了一个使用 SKAction 的优雅方法，它可以让你的节点动摇.例如，水平摇动:

I found an elegant method using SKAction, that make shake your node. For example, with an horizontal shake:

-(void)shake:(NSInteger)times {
    CGPoint initialPoint = self.position;
    NSInteger amplitudeX = 32;
    NSInteger amplitudeY = 2;
    NSMutableArray * randomActions = [NSMutableArray array];
    for (int i=0; i<times; i++) {
        NSInteger randX = self.position.x+arc4random() % amplitudeX - amplitudeX/2;
        NSInteger randY = self.position.y+arc4random() % amplitudeY - amplitudeY/2;
        SKAction *action = [SKAction moveTo:CGPointMake(randX, randY) duration:0.01];
        [randomActions addObject:action];
    }

    SKAction *rep = [SKAction sequence:randomActions];

    [self runAction:rep completion:^{
        self.position = initialPoint;
    }];
}

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