ios - 检测按钮被点击 - iOS

Question

我正在使用 objective-c，我想检测用户何时点击按钮(不是他点击按钮的时间，而是被录音直到他停止的实际时刻)。有什么方法吗？如果有的话，我找不到它。谢谢

Answer 1

使用 touchDown 事件，您可以在按下按钮时执行操作

示例

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var label: UILabel!
    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 testing(_ sender: Any) {
        label.textColor = UIColor.red
    }

    @IBAction func testingCancel(_ sender: Any) {
        label.textColor = UIColor.black
    }

    @IBAction func testingUpInside(_ sender: Any) {
        label.textColor = UIColor.black
    }


}