Question

我正在尝试使用MDCSwipeToChoose Delegate在Swift中执行“Tinder Swipe”。我正在关注本教程https://github.com/modocache/MDCSwipeToChoose

但是在安装CocoaPod并插入教程中的代码后，我得到错误“Type'ViewController'不符合协议'MDCSwipeToChooseDelegate'”。以下是我的ViewController中包含错误的部分代码：

import UIKit


class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    var options = MDCSwipeToChooseViewOptions() // Here is where I get the error
    options.delegate = self //And the same error here
    options.likedText = "Keep"
    options.likedColor = UIColor.blueColor()
    options.nopeText = "Delete"
    options.onPan = { state -> Void in
        if state.thresholdRatio == 1 && state.direction == MDCSwipeDirection.Left {
            println("Photo deleted!")
        }
    }

    var view = MDCSwipeToChooseView(frame: self.view.bounds, options: options)
    view.imageView.image = UIImage(named: "photo.png")
    self.view.addSubview(view)
}

Answer 1

您的ViewController应该实现MDCSwipeToChooseDelegate协议。所以应该是这样的：

class ViewController: UIViewController, MDCSwipeToChooseDelegate {

你可能想要实现这个协议的方法（有可选的，但根据你想做什么，你可能不得不使用它们）

func viewDidCancelSwipe(view: UIView) -> Void

func view(view: UIView, shouldBeChosenWithDirection: MDCSwipeDirection) -> Bool

func view(view: UIView, wasChosenWithDirection: MDCSwipeDirection) -> Void

Answer 2

您是否实施了所有必要的方法？

func viewDidCancelSwipe(view: UIView) -> Void

func view(view: UIView, shouldBeChosenWithDirection: MDCSwipeDirection) -> Bool

func view(view: UIView, wasChosenWithDirection: MDCSwipeDirection) -> Void

类型'ViewController'不符合协议'MDCSwipeToChooseDelegate'

2 个答案: