Swift:查看MessageController后iOS动画停止(iOS的消息页面)
问题描述:
我在用户按下徽标后正在运行动画。 这是动画:Swift:查看MessageController后iOS动画停止(iOS的消息页面)
func rightRotateView(targetView: UIView, duration: Double = 5) {
UIView.animate(withDuration: duration, delay: 0.0, options: [.repeat, .curveLinear] , animations: {
targetView.transform = targetView.transform.rotated(by: CGFloat.pi * 5)
}) { finished in
// self.rightRotateView(targetView: targetView)
}
}
长按的3秒钟之后(在这一次的动画应该仍然运行),我提出了用户的消息控制器:
if MFMessageComposeViewController.canSendText() == true {
print(self.urgentNumber)
let recipients:[String] = ["\(self.urgentNumber as! String)"]
self.messageController.messageComposeDelegate = self as? MFMessageComposeViewControllerDelegate
self.messageController.recipients = recipients
self.messageController.body = "Hey,\nmy longitude: \(self.userLocation.coordinate.longitude) \nmy latitude: \(self.userLocation.coordinate.latitude)"
self.present(self.messageController, animated: true, completion: nil)
} else {
//handle text messaging not available
}
当我按消息控制中的取消按钮,我将返回动画页面,但动画停止工作。 我试过本后重新运行动画,并在
func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) {
}
但没有奏效。
答
我发现这个问题,只需重新运行在完成相同的动画,(你可以使用CABasicAnimation或干脆UIView.animate):
func rightRotateView(targetView: UIView, duration: Double = 5) {
UIView.animate(withDuration: duration, delay: 0.0, options: [.repeat, .curveLinear] , animations: {
targetView.transform = targetView.transform.rotated(by: CGFloat.pi * 5)
}) { finished in
let anim = CABasicAnimation(keyPath:"transform.rotation")
anim.fromValue = 0.000
anim.toValue = 360.0
anim.speed = 0.001
anim.repeatCount = .infinity
targetView.layer.add(anim, forKey: "transform.rotation")
}
}
我试过了,看到动画刚刚重新启动,当我添加这个实现。如果动画处于中间位置,它将重新启动,产生波涛汹涌的效果。有没有办法解决? – ArielSD