UILongPressGestureRecognizer 访问被点击的按钮

Question

我设置了一个 UILongPressGestureRecognizer 来处理视图中的四个不同按钮，我如何访问在我的代码中单击了哪个按钮？

我的 UILongPressGestureRecognizer 看起来像这样：

@IBAction func editText(sender: UILongPressGestureRecognizer) {
        textFieldInput.hidden = false
        iphoneSaveCharName.hidden = false
      }

我想使用长按来编辑按钮文本

编辑 1：

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var iphoneTableView: UITableView!
    @IBOutlet weak var textFieldInput: UITextField!
    @IBOutlet weak var iphoneSaveCharName: UIButton!
    @IBOutlet weak var charOne: UILabel!
    @IBOutlet weak var charTwo: UILabel!
    @IBOutlet weak var charTree: UILabel!
    @IBOutlet weak var charFour: UILabel!
    @IBOutlet weak var test1: UIButton! //button that I am clicking on!



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

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    //Function I made so I can save the user input
    @IBAction func iphoneSaveTextInput(sender: UIButton) {
        let textData = textFieldInput.text
        textFieldInput.hidden = true
        iphoneSaveCharName.hidden = true
        charTwo.text = textData

    }

    // This is the LongPress Action
    @IBAction func editText(sender: UILongPressGestureRecognizer) {
        textFieldInput.hidden = false
        iphoneSaveCharName.hidden = false

        func longPressMethod(gesture: UILongPressGestureRecognizer) {

            println(gesture.view)

            if gesture.view is UIButton {

                let test1 = gesture.view as UIButton
                println(test1)
            }
        }

    }
}

编辑 2：Layout

编辑 3：新视图控制器

 import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var iphoneTableView: UITableView!
    @IBOutlet weak var textFieldInput: UITextField!
    @IBOutlet weak var iphoneSaveCharName: UIButton!
    @IBOutlet weak var charOne: UIButton!
    @IBOutlet weak var charTwo: UIButton!
    @IBOutlet weak var charThree: UIButton!
    @IBOutlet weak var charFour: UIButton!




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

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func iphoneSaveTextInput(sender: UIButton) -> Void{

        let textData = textFieldInput.text
        textFieldInput.hidden = true
        iphoneSaveCharName.hidden = true
    }

    @IBAction func editText(sender: AnyObject) {
        if sender is UILongPressGestureRecognizer &&
            sender.state == UIGestureRecognizerState.Began {

                textFieldInput.hidden = false
                iphoneSaveCharName.hidden = false

//                func iphoneSaveTextInput(sender: UIButton){
//                    var textData = textFieldInput.text
//                    textFieldInput.hidden = true
//                    iphoneSaveCharName.hidden = true
//                
//                }

                let button = sender.view as UIButton
                println(button)

                if button.tag == 1{
                    charOne.setTitle("textData", forState: .Normal)
                } else if button.tag == 2{
                    charTwo.setTitle("textData2", forState: .Normal)
                } else if button.tag == 3{
                    charThree.setTitle("textData3", forState: .Normal)
                } else if button.tag == 4{
                    charFour.setTitle("textData4", forState: .Normal)
                }
        }
    }
}

答案：

这是最终的视图控件：

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var iphoneTableView: UITableView!
    @IBOutlet weak var textFieldInput: UITextField!
    @IBOutlet weak var iphoneSaveCharName: UIButton!
    @IBOutlet weak var charOne: UIButton!
    @IBOutlet weak var charTwo: UIButton!
    @IBOutlet weak var charThree: UIButton!
    @IBOutlet weak var charFour: UIButton!




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

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func iphoneSaveTextInput(sender: UIButton) -> Void{

        let textData = textFieldInput.text
        textFieldInput.hidden = true
        iphoneSaveCharName.hidden = true
    }


    @IBAction func editText(sender: AnyObject) {
        if sender is UILongPressGestureRecognizer &&
            sender.state == UIGestureRecognizerState.Began {

                textFieldInput.hidden = false
                iphoneSaveCharName.hidden = false

//                func iphoneSaveTextInput(sender: UIButton){
//                    var textData = textFieldInput.text
//                    textFieldInput.hidden = true
//                    iphoneSaveCharName.hidden = true
//                
//                }

                let button = sender.view as UIButton
                println(button)

                if button.tag == 1{
                    charOne.setTitle("textData", forState: .Normal)
                } else if button.tag == 2{
                    charTwo.setTitle("textData2", forState: .Normal)
                } else if button.tag == 3{
                    charThree.setTitle("textData3", forState: .Normal)
                } else if button.tag == 4{
                    charFour.setTitle("textData4", forState: .Normal)
                }
        }
    }
}

我最想给大家一个最好的答案，因为每个人都帮助了我！我必须为每个按钮创建一个长按，否则代码会混淆。

Answer 1

您的问题向我介绍了一个非常酷的功能，非常感谢！ :)

事实证明，如果您将 UILongPressGestureRecognizer 附加到情节提要中的 UIButton 并将该按钮 和 手势附加到 swift 类中的 IBAction，则 IBAction 方法可以识别触摸是轻敲还是长按！很酷吧？

首先，确保每个UIButton 都有自己独特的UILongPressGestureRecognizer；然后您可以像这样编辑您的代码，以便它能够识别正在按下哪个按钮以及该按下是简单的点击还是UILongPressGestureRecognizer：

// Connect both your button *and* its gestures to the
// `IBAction` method so that the function will be called
// no matter what kind of gesture it recognizes -- tap, 
// long press, or otherwise.
@IBAction func buttonSelected(sender: AnyObject) {

    // But to see if the gesture is a long press, you can
    // simply check the sender's class and execute the code
    // when the gesture begins.
    if sender is UILongPressGestureRecognizer &&
        sender.state == UIGestureRecognizerState.Began {

        // These two lines are originally from your
        // editText method
        textFieldInput.hidden = false
        iphoneSaveCharName.hidden = false

        // Then to identify which button was long pressed you
        // can check the sender's view, to see which button IBOutlet
        // that gesture's view belongs to.

        // Method #1:

        let button = sender.view as UIButton

        if button == thisButton {

        } else if button == thatButton {

        }
        ...

        // Or you can check the gesture view's tag to see which
        // button it belongs to (i.e. whichever button has a matching
        // tag).

        // Method #2:

        let button = sender.view as UIButton

        if button.tag == 1 {

        } else if button.tag == 2 {

        }
        ...
    }

    // Else if it's not a long press gesture, perform
    // whatever action you'd like to accomplish during a
    // normal button tap
    else if !(sender is UILongPressGestureRecognizer) {

        // These lines are originally from your
        // iphoneSaveTextInput
        let textData = textFieldInput.text
        textFieldInput.hidden = true
        iphoneSaveCharName.hidden = true

    }
}

但是如果您想继续将UILongPressGestureRecognizer IBAction 与UIButton 的IBAction 分开（即将UIButtons 链接到iphoneSaveTextInput: 并将您的UILongPressGestureRecognizers 链接到@987654336 @)，那也应该没问题。保持你的 iphoneSaveTextInput: 方法不变，然后像这样更新你的 editText: 方法：

// This is the LongPress Action
@IBAction func editText(sender: UILongPressGestureRecognizer) {

    if sender.state == UIGestureRecognizerState.Began {

        textFieldInput.hidden = false
        iphoneSaveCharName.hidden = false

        // Then to identify which button was long pressed you
        // can check the sender's view, to see which button IBOutlet
        // that gesture's view belongs to.

        // Method #1:

        let button = sender.view as UIButton

        if button == thisButton {

        } else if button == thatButton {

        }
        ...

        // Or you can check the gesture view's tag to see which
        // button it belongs to (i.e. whichever button has a matching
        // tag).

        // Method #2:

        let button = sender.view as UIButton

        if button.tag == 1 {

        } else if button.tag == 2 {

        }
        ...

    }
}

Answer 2

您不想在不同的视图中使用相同的手势识别器：

Can you attach a UIGestureRecognizer to multiple views?

手势识别器的view 属性可能是您想要检查的，但您希望每个视图都有不同的手势识别器。

但是，如果您愿意，它们都可以链接到同一个选择器，并且您可以通过这种方式访问​​传入识别器的视图。

Answer 3

根据您按下按钮的时间长短，使按钮具有不同操作的一般方法，如下所示（计时器是一个属性），

@IBAction func buttonDown(sender: UIButton) { // connected to touchDown
       timer = NSTimer.scheduledTimerWithTimeInterval(0.5, target: self, selector: "handleTimer", userInfo: sender, repeats: false)
    }


    @IBAction func buttonUp(sender: UIButton) { // connected to touchUpInside
        if timer != nil {
            timer.invalidate()
            println("change view")
        }
    }


    func handleTimer() {
        var button = timer.userInfo as UIButton
        timer = nil
        button.setTitle("New Title", forState: .Normal)
    }