Swift - 点击箭头旋转

let arrowImage = UIImageView(image: UIImage(named: "Machine_arrow")!.imageWithRenderingMode(.AlwaysTemplate))

let arrowButton = UIButton(frame: CGRectMake(700, 20, arrowImage.bounds.width, arrowImage.bounds.height))

arrowButton.addSubview(arrowImage)

arrowButton.addTarget(self, action: #selector(btnClicked(_:event:)), forControlEvents: .TouchUpInside)

// 检查用户点击按钮时的位置，并转发事件到对应的accessorytapped事件

func btnClicked(sender: UIButton, event: AnyObject) {

let touches = event.allTouches()! as NSSet

let touch = touches.anyObject() as! UITouch

let currentTouchPosition = touch.locationInView(selectTable)

let indexPath: NSIndexPath = selectTable.indexPathForRowAtPoint(currentTouchPosition)!

tableView(selectTable, accessoryButtonTappedForRowWithIndexPath: indexPath)

}

// 这样，UITableView的accessoryButtonTappedForRowWithIndexPath方法会被触发，并且获得一个indexPath 参数。通过这个indexPath 参数，我们可以区分到底是众多按钮中的哪一个附件按钮发生了触摸事件：

func tableView(tableView: UITableView, accessoryButtonTappedForRowWithIndexPath indexPath: NSIndexPath) {

let idx = indexPath.row

//在这里加入自己的逻辑

print(idx)

// 点击箭头旋转

rotat()

// rotateArrow()

}

// 旋转动画一

func rotat() {

//创建旋转动画

let anim = CABasicAnimation(keyPath: "transform.rotation")

//旋转角度

anim.toValue = 1 * M_PI

//旋转指定角度需要的时间

anim.duration = 1

//旋转重复次数

anim.repeatCount = MAXFLOAT

//动画执行完后不移除

anim.removedOnCompletion = true

//将动画添加到视图的laye上

arrowImage.layer.addAnimation(anim, forKey: nil)

//取消动画

arrowImage.layer.removeAllAnimations()

//这个是旋转方向的动画

UIView.animateWithDuration(0.2) { () -> Void in

//指定旋转角度是180°

self.arrowImage.transform = CGAffineTransformRotate(self.arrowImage.transform, CGFloat(M_PI))

}

}

// 旋转动画二

func rotateArrow() {

UIView.animateWithDuration(0.3, animations: {[weak self] () -> () in

if let selfie = self {

selfie.arrowImage.transform = CGAffineTransformRotate(selfie.arrowImage.transform, 180 * CGFloat(M_PI/180))

}

})

}