給imageView 添加分類,然后直接調(diào)用
//開始旋轉(zhuǎn)
imageView. rotate360DegreeWithImageView()
//停止旋轉(zhuǎn)
imageView.stopRotate()

/// imageView 旋轉(zhuǎn)
    ///
    /// - Parameters:
    ///   - duration: 周期 (控制速度:2--10)
    ///   - repeatCount: 次數(shù)
    func rotate360DegreeWithImageView(duration:CFTimeInterval , repeatCount :Float ) {
        
        //讓其在z軸旋轉(zhuǎn)
        let rotationAnimation  = CABasicAnimation(keyPath: "transform.rotation.z")
        
        //旋轉(zhuǎn)角度
        rotationAnimation.toValue = NSNumber(value:  Double.pi * 2.0 )
        
         //旋轉(zhuǎn)周期
        rotationAnimation.duration = duration;
        
        //旋轉(zhuǎn)累加角度
        rotationAnimation.isCumulative = true;
        
        //旋轉(zhuǎn)次數(shù)
        rotationAnimation.repeatCount = repeatCount;
        
        self.layer .add(rotationAnimation, forKey: "rotationAnimation")
        
    }
    //停止旋轉(zhuǎn)
    func stopRotate() {
        
        self.layer.removeAllAnimations()
    }