Swift - RotateView

 

效果

 

源码

////  RotateView.swift//  Swift-Animations////  Created by YouXianMing on 16/8/14.//  Copyright © 2016年 YouXianMing. All rights reserved.//import UIKit// MARK: Public class : RotateViewclass RotateView: UIView {    // MARK: Properties.        var rotateDuration : NSTimeInterval = 0.25        // MARK: Animation method.        func changeToUpAnimated(animated : Bool) {                UIView.animateWithDuration((animated == true ? self.rotateDuration : 0.0)) {                        self.transform = self.defaultTransform        }    }        func changeToLeftAnimated(animated : Bool) {                UIView.animateWithDuration((animated == true ? self.rotateDuration : 0.0)) {                        self.transform = CGAffineTransformRotate(self.defaultTransform, CGFloat(-M_PI_2))        }    }        func changeToRightAnimated(animated : Bool) {                UIView.animateWithDuration((animated == true ? self.rotateDuration : 0.0)) {                        self.transform = CGAffineTransformRotate(self.defaultTransform, CGFloat(M_PI_2))        }    }        func changeToDownAnimated(animated : Bool) {                UIView.animateWithDuration((animated == true ? self.rotateDuration : 0.0)) {                        self.transform = CGAffineTransformRotate(self.defaultTransform, CGFloat(M_PI))        }    }        // MARK: Private value & func & system method.        private var defaultTransform : CGAffineTransform!        override init(frame: CGRect) {                super.init(frame : frame)        defaultTransform = self.transform    }        required init?(coder aDecoder: NSCoder) {                fatalError("init(coder:) has not been implemented")    }}