如何在iOS中创建自定义UIActivity？

Question

如何在iOS中创建自定义UIActivity？如何UIActivity在iOS中创建自定义？我想要这个的原因是在我的一个应用程序中添加一个Review App按钮，将用户带到App Store的评论部分。我该如何创建这样的自定义UIActivity？

Answer 1

我的Swift 3实现基于DogCoffee的：

class ActivityViewCustomActivity: UIActivity {

    // MARK: Properties

    var customActivityType: UIActivityType
    var activityName: String
    var activityImageName: String
    var customActionWhenTapped: () -> Void


    // MARK: Initializer

    init(title: String, imageName: String, performAction: @escaping () -> Void) {
        self.activityName = title
        self.activityImageName = imageName
        self.customActivityType = UIActivityType(rawValue: "Action \(title)")
        self.customActionWhenTapped = performAction
        super.init()
    }



    // MARK: Overrides

    override var activityType: UIActivityType? {
        return customActivityType    }



    override var activityTitle: String? {
        return activityName    }



    override class var activityCategory: UIActivityCategory {
        return .share    }



    override var activityImage: UIImage? {
        return UIImage(named: activityImageName)
    }



    override func canPerform(withActivityItems activityItems: [Any]) -> Bool {
        return true
    }



    override func prepare(withActivityItems activityItems: [Any]) {
        // Nothing to prepare
    }



    override func perform() {
        customActionWhenTapped()
    }}