在没有UILongPressGestureRecognizer的情况下,在Swift中识别长按可以通过以下步骤实现:
import UIKit.UIGestureRecognizerSubclass
class CustomLongPressGestureRecognizer: UILongPressGestureRecognizer {
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
super.touchesBegan(touches, with: event)
state = .began
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent) {
super.touchesEnded(touches, with: event)
state = .ended
}
}
let longPressGesture = CustomLongPressGestureRecognizer(target: self, action: #selector(handleLongPress(_:)))
longPressGesture.minimumPressDuration = 0.5 // 设置长按的最小时间
yourView.addGestureRecognizer(longPressGesture)
@objc func handleLongPress(_ gestureRecognizer: CustomLongPressGestureRecognizer) {
if gestureRecognizer.state == .began {
// 长按开始时的处理逻辑
} else if gestureRecognizer.state == .ended {
// 长按结束时的处理逻辑
}
}
这样,当用户在yourView上长按时,会触发handleLongPress(_: )方法,并根据手势的状态进行相应的处理。
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