Swift带振动效果的UITextField

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代码中有注释，就直接上代码了

import Foundation
import UIKit

extension UITextField{
    //定义类型
    enum ShakeType {
        case Horizontal
        case Vertical
    }

    /**
     UITextField的振动方法
     - parameter time:       振动次数
     - parameter delta:      振动偏移量
     - parameter speed:      动画速度
     - parameter shakeType:  振动类型
     - parameter completion:
     */
    func shakeTextField(time: Int = 10, delta: CGFloat = 5,speed: NSTimeInterval = 0.03,shakeType: ShakeType = .Horizontal,completion:(() -> Void)? = nil){
        //根据time的奇偶来确定振动方向
        let direction:CGFloat = (time % 2 == 0) ? 1 : -1
        UIView.animateWithDuration(speed, animations: { 
            //根据振动类型选择动画
            self.transform = (shakeType == ShakeType.Horizontal) ? CGAffineTransformMakeTranslation(delta * direction, 0) : CGAffineTransformMakeTranslation(0, delta * direction)
            }) { (finished) in
                if time <= 0{
                    UIView.animateWithDuration(speed, animations: { 
                        self.transform = CGAffineTransformIdentity
                        }, completion: { (finished) in
                            //如果有回调方法，则实现回调方法
                            if let comp = completion{
                                comp()
                            }
                    })
                    return
                }
            self.shakeTextField(time - 1, delta: delta, speed: speed, shakeType: shakeType, completion: completion)
        }
    }
}

函数调用

class ViewController: UIViewController {

    var textField:UITextField!
    var textField1:UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        textField = UITextField(frame: CGRect(x: 10, y: 100, width: 200, height: 40))
        textField.backgroundColor = UIColor.grayColor()
        self.view.addSubview(textField)

        textField1 = UITextField(frame: CGRect(x: 10, y: 150, width: 200, height: 40))
        textField1.backgroundColor = UIColor.grayColor()
        self.view.addSubview(textField1)

        let btn = UIButton(frame: CGRect(x: 10, y: 200, width: 200, height: 40))
        btn.backgroundColor = UIColor.blueColor()
        btn.setTitle("振动吧", forState: .Normal)
        btn.addTarget(self, action: #selector(self.startShake), forControlEvents: .TouchUpInside)
        self.view.addSubview(btn)
    }

    func startShake(){
        textField.shakeTextField(shakeType: UITextField.ShakeType.Vertical) {
            print("我振动了1")
        }
        textField1.shakeTextField(shakeType: UITextField.ShakeType.Horizontal) {
            print("我振动了2")
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

效果图

回调函数打印