Ios Swift 3中的滑动按钮
我想做一个滑动按钮。我想让你在我向右移动时更改按钮的图像。当我向左滑动时,我希望按钮图像恢复 我的代码:Ios Swift 3中的滑动按钮,ios,swift3,Ios,Swift3,我想做一个滑动按钮。我想让你在我向右移动时更改按钮的图像。当我向左滑动时,我希望按钮图像恢复 我的代码: import UIKit class ViewController: UIViewController { @IBOutlet var swipeButton: UIButton! let swipe = UISwipeGestureRecognizer() override func viewDidLoad() { super.viewDidLoad() let
import UIKit
class ViewController: UIViewController {
@IBOutlet var swipeButton: UIButton!
let swipe = UISwipeGestureRecognizer()
override func viewDidLoad()
{
super.viewDidLoad()
let swipeButtonRight: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("ButtonRight"))
swipeButtonRight.direction = UISwipeGestureRecognizerDirection.right
self.swipeButton.addGestureRecognizer(swipeButtonRight)
let swipeButtonLeft: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("ButtonLeft"))
swipeButtonLeft.direction = UISwipeGestureRecognizerDirection.left
self.swipeButton.addGestureRecognizer(swipeButtonLeft)
}
func respondToSwipeGesture(gesture: UIGestureRecognizer)
{
if let swipeGesture = gesture as? UISwipeGestureRecognizer
{
switch swipeGesture.direction
{
case UISwipeGestureRecognizerDirection.right:
swipeButton.setImage = UIImage(named:"x.png")
case UISwipeGestureRecognizerDirection.left:
swipeButton.setImage = UIImage(named:"y.png")
default:
break
}
}
}
}
可能有什么问题?在手势识别器的构造函数中的
动作参数中,您告诉应用程序寻找一个名为“ButtonRight”(和“ButtonLeft”)的方法。您应该在此处传入要执行的实际方法(例如“respondtoswipesignature”)
在“RespondToSweep手势”中放置一个断点,您将看到它从未被调用。第一个判断不是您的开关没有正确判断对象
#选择器(响应sweep手势:)
另一种设置图片的方法应该是这样写的
SwipeButton.setImage(UIImage(名为:“x”),forState:.normal)您对功能的描述听起来好像真的应该查看UIScrollView而不是滑动。将这两个图像放入其中,添加代码使其“调整”以显示用户滑动到的图像,然后完成操作!对于UIButton
s图像,您应该使用swipeButton.setImage(UIImage(名为:“x”),forState:.normal)
--您缺少forState:
如何修复它@ØyvindhaugetSWIFT的语法已经发生了很大的变化,但我相信这应该是可行的:#选择器(respondtoswipe手势:)