UILongPressGestureRecognizer- 如何在按住的同时增加大小
UILongPressGestureRecognizer- How increase size while holding down
我正在尝试制作一个功能,当用户按住手指时,图像会在发生过渡时变大,直到达到一定大小。我知道如何使图像变大,但不知道如何使其仅在用户按住时才变大。
有谁知道如何做到这一点?是否需要 LongPressRecognizer?
抱歉没有代码,但我只是想弄清楚如何做到这一点。非常感谢您的提前帮助!
干杯,
西奥
你可以这样做:
@IBOutlet weak var myImageView: UIImageView!
var startAnimation = false
func handleTap(gestureRecognizer:UIGestureRecognizer) {
startAnimation = true
UIView.animate(withDuration: 0.5, animations: {
self.myImageView.frame = CGRect(x: 0, y: 0, width: 100, height: 100)
self.view.layoutIfNeeded()
}) { (finished) in
self.startAnimation = false
}
}
override func viewDidLoad() {
super.viewDidLoad()
let gesture = UILongPressGestureRecognizer(target: self, action: #selector(handleTap(gestureRecognizer:)))
myImageView.isUserInteractionEnabled = true
myImageView.addGestureRecognizer(gesture)
}
我正在尝试制作一个功能,当用户按住手指时,图像会在发生过渡时变大,直到达到一定大小。我知道如何使图像变大,但不知道如何使其仅在用户按住时才变大。
有谁知道如何做到这一点?是否需要 LongPressRecognizer?
抱歉没有代码,但我只是想弄清楚如何做到这一点。非常感谢您的提前帮助!
干杯, 西奥
你可以这样做:
@IBOutlet weak var myImageView: UIImageView!
var startAnimation = false
func handleTap(gestureRecognizer:UIGestureRecognizer) {
startAnimation = true
UIView.animate(withDuration: 0.5, animations: {
self.myImageView.frame = CGRect(x: 0, y: 0, width: 100, height: 100)
self.view.layoutIfNeeded()
}) { (finished) in
self.startAnimation = false
}
}
override func viewDidLoad() {
super.viewDidLoad()
let gesture = UILongPressGestureRecognizer(target: self, action: #selector(handleTap(gestureRecognizer:)))
myImageView.isUserInteractionEnabled = true
myImageView.addGestureRecognizer(gesture)
}