使用UITapGestureRecognizer传递参数 [英] Pass Parameter with UITapGestureRecognizer

问题描述

我可以通过UITapGestureRecognizer传递参数吗? 我已经看到了针对Objective-C的答案，但找不到迅速的答案

Is there any way i can pass parameters with UITapGestureRecognizer? I've seen this answered for objective-c but couldn't find an answer for swift

test.userInteractionEnabled = true
let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("imageTapped4:"))
// Something like text.myParamater
test.addGestureRecognizer(tapRecognizer)

然后在func imageTapped4(){}下接收myParameter

And then receive myParameter under func imageTapped4(){}

推荐答案

一种方法是将UITapGestureRecognizer子类化，然后设置一个属性，我在下面发布了一个示例.您还可以对发件人进行一些检查，并检查其是否等于某些标签，类，字符串等.

One approach would be to subclass UITapGestureRecognizer and then set a property, I've posted an example below. You could also do some check on the sender and check if equal to some tag, class, string, e.t.c

class ViewController: UIViewController {

    @IBOutlet weak var label1: UILabel!
    @IBOutlet weak var image: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        image.userInteractionEnabled = true;
        let tappy = MyTapGesture(target: self, action: #selector(self.tapped(_:)))
        image.addGestureRecognizer(tappy)
        tappy.title = "val"
    }

    func tapped(sender : MyTapGesture) {
        print(sender.title)
        label1.text = sender.title
    }
}

class MyTapGesture: UITapGestureRecognizer {
    var title = String()
}

关于SO的例子很多，看看吧，祝你好运.

There are lots of examples on SO, have a look, good luck.

这篇关于使用UITapGestureRecognizer传递参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！