66 To apply the force of gravity to UIView

Swift3.0 // // ViewController.swift // UIKit075 // // Created by Misato Morino on 2016/08/15. // Copyright © 2016年 Misato Morino. All rights reserved. // import UIKit class ViewController: UIViewController { //UIDynamicAnimatorはインスタンスを保存しなければアニメーションが実行されない var animator : UIDynamicAnimator! var gravity : UIGravityBehavior! override func viewDidLoad() { super.viewDidLoad() self.view.backgroundColor = UIColor.cyan // Labelを作成. let myLabel: UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 40)) myLabel.backgroundColor = UIColor.orange myLabel.layer.masksToBounds = true myLabel.layer.cornerRadius = 20.0 myLabel.text = "Hello Swift!!" myLabel.textColor = UIColor.white myLabel.shadowColor = UIColor.gray myLabel.textAlignment = NSTextAlignment.center myLabel.layer.position = CGPoint(x: self.view.bounds.width/2,y: -200) self.view.addSubview(myLabel) // Buttonを作成. let myButton = UIButton(frame: CGRect(x: 0, y: 0, width: 200, height: 50)) myButton.layer.position = CGPoint(x: self.view.frame.midX, y: 500) myButton.layer.masksToBounds = true myButton.layer.cornerRadius = 20.0 myButton.setTitleColor(UIColor.white, for: UIControlState.normal) myButton.setTitleColor(UIColor.black, for: UIControlState.highlighted) myButton.backgroundColor = UIColor.red myButton.setTitle("Dropped!", for: UIControlState.normal) myButton.addTarget(self, action: #selector(ViewController.onClickMyButton(sender:)), for: UIControlEvents.touchUpInside) self.view.addSubview(myButton) // UIDynamiAnimatorの生成とインスタンスの保存. animator = UIDynamicAnimator(referenceView: self.view) // 重量を作り、Viewに適用させる. gravity = UIGravityBehavior(items: [myLabel]) // Collisionを作成、Viewに適用させる. let collision = UICollisionBehavior(items: [myLabel]) // 透明な四角形の当たり判定を作る. collision.addBoundary( // Identifier. withIdentifier: "barrier", // ベジエで四角形の図形を作る. for: UIBezierPath(rect: CGRect(x: self.view.frame.midX, y: self.view.frame.midY, width: self.view.frame.maxX, height: 10) ) ) // Collisionのアニメーションを実行. animator.addBehavior(collision) } func onClickMyButton(sender : UIButton){ // Gravityのアニメーションを実行. animator.addBehavior(gravity) } } Swift 2.3 // // ViewController.swift // UIKit075 // // Created by Misato Morino on 2016/08/15. // Copyright © 2016年 Misato Morino. All rights reserved. // import UIKit class ViewController: UIViewController { //UIDynamicAnimatorはインスタンスを保存しなければアニメーションが実行されない var animator : UIDynamicAnimator! var gravity : UIGravityBehavior! override func viewDidLoad() { super.viewDidLoad() self.view.backgroundColor = UIColor.cyanColor() // Labelを作成. let myLabel: UILabel = UILabel(frame: CGRectMake(0,0,200,40)) myLabel.backgroundColor = UIColor.orangeColor() myLabel.layer.masksToBounds = true myLabel.layer.cornerRadius = 20.0 myLabel.text = "Hello Swift!!" myLabel.textColor = UIColor.whiteColor() myLabel.shadowColor = UIColor.grayColor() myLabel.textAlignment = NSTextAlignment.Center myLabel.layer.position = CGPoint(x: self.view.bounds.width/2,y: -200) self.view.addSubview(myLabel) // Buttonを作成. let myButton = UIButton(frame: CGRectMake(0, 0, 200, 50)) myButton.layer.position = CGPointMake(self.view.frame.midX, 500) myButton.layer.masksToBounds = true myButton.layer.cornerRadius = 20.0 myButton.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal) myButton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Highlighted) myButton.backgroundColor = UIColor.redColor() myButton.setTitle("Dropped!", forState: UIControlState.Normal) myButton.addTarget(self, action: #selector(ViewController.onClickMyButton(_:)), forControlEvents: UIControlEvents.TouchUpInside) self.view.addSubview(myButton) // UIDynamiAnimatorの生成とインスタンスの保存. animator = UIDynamicAnimator(referenceView: self.view) // 重量を作り、Viewに適用させる. gravity = UIGravityBehavior(items: [myLabel]) // Collisionを作成、Viewに適用させる. let collision = UICollisionBehavior(items: [myLabel]) // 透明な四角形の当たり判定を作る. collision.addBoundaryWithIdentifier( // Identifier. "barrier", // ベジエで四角形の図形を作る. forPath: UIBezierPath(rect: CGRectMake(self.view.frame.midX, self.view.frame.midY, self.view.frame.maxX, 10) ) ) // Collisionのアニメーションを実行. animator.addBehavior(collision) } func onClickMyButton(sender : UIButton){ // Gravityのアニメーションを実行. animator.addBehavior(gravity) } } 2.3と3.0の差分 addBoundaryWithIdentifier から addBoundary に変更