Question

我想在不同情况下实现按钮的不同目标。

如果它是当前用户自己的个人资料，则该按钮应将目标“转到设置”。如果用户不同，我想添加一个关注/取消关注操作。

检查所有参数后，我的代码应该可以工作。但这是行不通的。我添加了一些打印件，但该按钮不可单击。

func setupUserInformation(user: UserModel) {
    usernameLabel.text = user.username

    if user.uid == UserApi.shared.CURRENT_USER_ID {
        editButton.setTitle("Einstellungen", for: .normal)

        editButton.addTarget(self, action: #selector(goToSettings), for: .touchUpInside)

    } else {
        if user.isFollowing! == true {
            setupUnfollowButton()
        } else {
            setupFollowButton()
        }
    }
}

@objc func goToSettings() {
    delegate?.goToSettingVC()
}

func setupFollowButton() {
    editButton.layer.borderWidth = 1
    editButton.layer.borderColor = UIColor.lightGray.cgColor
    editButton.layer.cornerRadius = 5
    editButton.clipsToBounds = true

    editButton.setTitleColor(UIColor.white, for: .normal)
    editButton.backgroundColor = UIColor(red: 1 / 255, green: 84 / 255, blue: 147 / 255, alpha: 1.0)
    editButton.setTitle("Folgen", for: UIControl.State.normal)
    editButton.addTarget(self, action: #selector(followAction), for: .touchUpInside)
}

@objc func followAction() {
    print("Button wurde gedrückt")
    if user?.isFollowing == false {
        FollowApi.shared.followAction(withUser: user!.uid!)
        setupUnfollowButton()
        user?.isFollowing = true

    }
}

func setupUnfollowButton() {
    editButton.layer.borderWidth = 1
    editButton.layer.borderColor = UIColor.lightGray.cgColor
    editButton.layer.cornerRadius = 5
    editButton.clipsToBounds = true

    editButton.setTitleColor(UIColor.black, for: .normal)
    editButton.backgroundColor = UIColor.white
    editButton.setTitle("Entfolgen", for: UIControl.State.normal)
    editButton.addTarget(self, action: #selector(unFollowAction), for: .touchUpInside)
}

@objc func unFollowAction() {
    print("Button wurde gedrückt")
    if user?.isFollowing == true {
        FollowApi.shared.unfollowAction(withUser: user!.uid!)
        setupFollowButton()
        user?.isFollowing = false

    }
}

在此先感谢您的帮助！

更新

进行一些更改，如以下答案所示。但是仍然不会执行添加目标。

var user: UserModel? {
    didSet {
        guard let _user = user else { return }
        setupUserInformation(user: _user)
    }
}

func setupUserInformation(user: UserModel) {

    editButton.addTarget(self, action: #selector(didTapEditButton), for: .touchUpInside)

    if user.uid == UserApi.shared.CURRENT_USER_ID {
        editButton.setTitle("Einstellungen", for: .normal)

    }else {
        if user.isFollowing! == true {
            setupUnfollowButton()
        } else {
            setupFollowButton()
        }
    }

}

@objc func didTapEditButton() {

    //Add IF conditions according to what your button should do in different cases here.
    if user!.uid == UserApi.shared.CURRENT_USER_ID {
        editButton.setTitle("Einstellungen", for: .normal)
        goToSettings()
    }else {
        if user!.isFollowing! == true {
            unFollowAction()
        } else {
            followAction()
        }
    }

}

@objc func goToSettings() {
    delegate?.goToSettingVC()
}

func setupFollowButton() {
    editButton.layer.borderWidth = 1
    editButton.layer.borderColor = UIColor.lightGray.cgColor
    editButton.layer.cornerRadius = 5
    editButton.clipsToBounds = true

    editButton.setTitleColor(UIColor.white, for: .normal)
    editButton.backgroundColor = UIColor(red: 1 / 255, green: 84 / 255, blue: 147 / 255, alpha: 1.0)
    editButton.setTitle("Folgen", for: UIControl.State.normal)
}

func followAction() {
    print("Button wurde gedrückt")
    if user?.isFollowing == false {
        FollowApi.shared.followAction(withUser: user!.uid!)
        setupUnfollowButton()
        user?.isFollowing = true

    }
}

func setupUnfollowButton() {
    editButton.layer.borderWidth = 1
    editButton.layer.borderColor = UIColor.lightGray.cgColor
    editButton.layer.cornerRadius = 5
    editButton.clipsToBounds = true

    editButton.setTitleColor(UIColor.black, for: .normal)
    editButton.backgroundColor = UIColor.white
    editButton.setTitle("Entfolgen", for: UIControl.State.normal)
}

func unFollowAction() {
    print("Button wurde gedrückt")
    if user?.isFollowing == true {
        FollowApi.shared.unfollowAction(withUser: user!.uid!)
        setupFollowButton()
        user?.isFollowing = false

    }
}

Answer 1

请注意，添加目标不会执行操作代码；它只是设置按钮以供用户稍后点击时使用。

一旦意识到这一点，您可能会发现这里的整个方法可能不是一个好主意。不要尝试有条件地设置目标和操作。而是一劳永逸地设定目标和行动。然后在action方法内部，您可以在其中放置条件来决定每当点击按钮时要做什么。

Answer 2

马特是对的！！您的方法在这里是完全错误的。请尝试修改您的方法。

您的方法应该是这样的：

override func viewDidLoad() {
    super.viewDidLoad()

    //Set Target to your button only once.
    editButton.addTarget(self, action: #selector(didTapEditButton), for: .touchUpInside)

}

@objc func didTapEditButton() {

    //Add IF conditions according to what your button should do in different cases here. 
    if user.uid == UserApi.shared.CURRENT_USER_ID {
        goToSettings()
    }else {
        if user.isFollowing! == true {
            setupUnfollowButton()
        } else {
            setupFollowButton()
        }
    }

}


func setupFollowButton() {

    //Make the check to see what state your button is currently in by checking if the title of the button is "Follow" or "Unfollow"
    if editButton.titleLabel?.text == "Unfollow"{
        editButton.layer.borderWidth = 1
        editButton.layer.borderColor = UIColor.lightGray.cgColor
        editButton.layer.cornerRadius = 5
        editButton.clipsToBounds = true

        editButton.setTitleColor(UIColor.white, for: .normal)
        editButton.backgroundColor = UIColor(red: 1 / 255, green: 84 / 255, blue: 147 / 255, alpha: 1.0)
        editButton.setTitle("Follow", for: UIControl.State.normal)

        followAction()
    }
}


 func setupUnfollowButton() {

    //Do the same here for the other state.
    if editButton.titleLabel?.text == "Follow"{
        editButton.layer.borderWidth = 1
        editButton.layer.borderColor = UIColor.lightGray.cgColor
        editButton.layer.cornerRadius = 5
        editButton.clipsToBounds = true

        editButton.setTitleColor(UIColor.black, for: .normal)
        editButton.backgroundColor = UIColor.white
        editButton.setTitle("Unfollow", for: UIControl.State.normal)

        unFollowAction()
    }
}


func followAction() {
    print("Button wurde gedrückt")
    if user?.isFollowing == false {
        FollowApi.shared.followAction(withUser: user!.uid!)
        setupUnfollowButton()
        user?.isFollowing = true

    }
}

func unFollowAction() {
    print("Button wurde gedrückt")
    if user?.isFollowing == true {
        FollowApi.shared.unfollowAction(withUser: user!.uid!)
        setupFollowButton()
        user?.isFollowing = false
    }
}

Answer 3

使用以下代码行解决了该问题：

cell.contentView.isUserInteractionEnabled = false

只是忘记了停用用户与集合视图的交互。当我点击按钮时，集合视图标题已激活，而不是按钮。

谢谢大家的帮助！

在Swift中将目标添加到Button

3 个答案: