ViewController 不符合自定义 UIButton Class

Question

我有一个自定义 UIButton class，我正尝试将其导入到我的项目中的 ViewController class，但我收到错误消息：'ViewController' 不符合协议 'OverrideButtonDelegate'"

这是来自自定义 UIButton 的代码 Class:

import Foundation
import UIKit

protocol OverrideButtonDelegate: NSObjectProtocol {
func overrideButtonDidStartPress(overrideButton: OverrideButton)
func overrideButtonDidEndPress(overrideButton: OverrideButton)
}

class OverrideButton: UIButton {
var delegate: OverrideButtonDelegate?

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    delegate?.overrideButtonDidStartPress(self)
}

override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
    delegate?.overrideButtonDidEndPress(self)
}
}

这里是 ViewController 的代码，我在其中收到错误消息 "Type 'ViewController' does not conform to protocol 'OverrideButtonDelegate'"

class ViewController: UIViewController, OverrideButtonDelegate {

Answer 1

你在UIViewController的delegate中定义了这两个函数吗？ 当class符合协议时，协议中的功能必须在class

中实现

class ViewController: UIViewController, OverrideButtonDelegate {

    func overrideButtonDidStartPress(overrideButton: OverrideButton)
    {
        //Code
    }
    func overrideButtonDidEndPress(overrideButton: OverrideButton)
    {
                    //Code
    }
}

ViewController 不符合自定义 UIButton Class

ViewController not conforming to a custom UIButton Class

ios

iphone

swift

uiviewcontroller

uibutton