如何正确使用CollisionBehavior使物品相互碰撞

Question

对你来说可能很简单。

我只是想以正确的方式使用碰撞模式。我的代码似乎没问题（没有错误），但项目只与视图的边界发生冲突。不是彼此。

我想知道 "translatesReferenceBoundsIntoBoundary" 是否会覆盖碰撞模式。

也许我应该使用 "addBoundary(withIdentifier:NSCopying, from: CGPoint, to:CGPoint)" 方法而不是 "translateReferenceBoundsIntoBoundary" 但没有找到如何实现 NSCopying class.

详情请看我的代码。

提前致谢。

import UIKit

class ViewController: UIViewController {

var tests:[String] = ["test1","test2","test3","test4","test5","test6","test7","test8","test9","test10","test11"]

var label:UILabel!
var color:UIColor!

var dynamicBehavior:UIDynamicBehavior!
var collisionBehavior:UICollisionBehavior!

var animatorArray = [UIDynamicAnimator]()


var countLabel = 0

override func viewDidLoad() {
    super.viewDidLoad()

    let size:CGFloat = 50.0
    var positionX:CGFloat = 60.0
    var positionY:CGFloat = 100.0


    for test in tests {
    label = UILabel(frame:CGRect(x: positionX, y: positionY, width: size, height: size))
    label.center = CGPoint(x: positionX, y: positionY)
    label.layer.cornerRadius = size * 0.5
    label.layer.masksToBounds = true
    label.backgroundColor = color
    label.textAlignment = .center
    label.textColor = UIColor.white
    label.adjustsFontSizeToFitWidth = true
    label.numberOfLines = 1
    label.text = test
    self.view.addSubview(label)
    countLabel = countLabel + 1

        if countLabel == 4 || countLabel == 8 {
            positionX = positionX - 140
            positionY = positionY + 100 }
        else { positionX = positionX + 60}

    for (i,_) in tests.enumerated() {

        let gravity = UIGravityBehavior(items: [label])
        let direction = CGVector(dx: 0.0, dy: 1.0)
        gravity.gravityDirection = direction

        let bounce = UIDynamicItemBehavior(items: [label])
        bounce.elasticity = 1.0

        let collisions = UICollisionBehavior(items: [label])
        collisions.translatesReferenceBoundsIntoBoundary = true
        collisions.collisionMode = UICollisionBehaviorMode.everything

    animatorArray.append(UIDynamicAnimator(referenceView: self.view))
    animatorArray[i].addBehavior(bounce)
    animatorArray[i].addBehavior(collisions)
    animatorArray[i].addBehavior(gravity)
    }
}

}
}

Answer 1

您的每个标签都被添加到一个单独的 UIDynamicAnimator 实例中，其中包含您的 for 循环中所有行为的单独实例。您可以只制作一个属性动画师和每个行为，并将每个标签添加到相同的动画师和行为。这样动画师就可以负责所有标签，而不仅仅是一个。

如何正确使用CollisionBehavior使物品相互碰撞

How to use CollisionBehavior properly to bring items to collide with each other

arrays

collision

ios

swift3