Question

我刚刚开始学习Swift，我一直在咨询Apple的Dev Guide，但在处理属性和指针时的一些语法让我失望。 Apple解释说，属性只是使用点语法，甚至API似乎反映了这一点，但它并不符合我想要的效果。这是我一直在做的事情。我也在努力实例初始化。 我已经正确创建了一个桥接标题任何指导都将不胜感激。谢谢！

这是我试图在swift中模拟的代码。

@property (nonatomic) SFWaterNode *waterSurface;
@property (nonatomic) NSTimeInterval lastUpdateTime;
@end

@implementation GameScene

- (void)didMoveToView:(SKView *)view {
    self.backgroundColor = [SKColor blackColor];

    CGPoint startPoint = CGPointMake(-1, self.size.height/2);
    CGPoint endPoint = CGPointMake(self.size.width, self.size.height/2);

    self.waterSurface = [SFWaterNode nodeWithStartPoint:startPoint endPoint:endPoint depth:self.size.height/2 color:[SKColor blueColor]];
    [self addChild:self.waterSurface];

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInNode:self];

    [self.waterSurface splash:location speed:-50];
}

- (void)update:(CFTimeInterval)currentTime {
    [self.waterSurface update:currentTime];
}

@end

Answer 1

请尝试以下代码：

public var waterSurface:SFWaterNode?
var lastUpdateTime:NSTimeInterval

func didMoveToView(view:SKView) {

    self.backgroundColor = .black

    let startPoint:CGPoint = CGPoint.init(x: -1, y: self.size.height/2)
    let endPoint:CGPoint = CGPoint(x: -1, y: self.size.height/2)

    self.waterSurface = SFWaterNode.nodeWithStartPoint(startPoint, endPoint:endPoint, depth:self.size.height/2, color:.blue)

    self.addChild(self.waterSurface)

}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    let touch:UITouch = touches.anyObject()
    let location:CGPoint = touch.location(inNode: self)
    self.waterSurface.splash(location, speed:-50)

}

func update(curentTime:CFTimeInterval) {

    self.waterSurface.update(currentTime)
}

Objective-C属性和指向Swift的指针

1 个答案: