如果我的collectionView中的数据加载,我将如何显示活动指示符和白色背景?
我目前有这个:
let activityView = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.view.addSubview(activityView)
activityView.hidesWhenStopped = true
activityView.center = self.view.center
activityView.startAnimating()
DispatchQueue.global(qos: DispatchQoS.QoSClass.background).async {
fetchPosts()
}
DispatchQueue.main.async {
UIView.animate(withDuration: 1, delay: 1, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseInOut, animations: {
self.collectionView?.reloadData()
self.collectionView?.alpha = 1
self.activityView.stopAnimating()
}, completion: nil)
}
}
答案 0 :(得分:1)
试试这个我希望这会对你有所帮助
let activityView = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let fadeView:UIView = UIView()
fadeView.frame = self.view.frame
fadeView.backgroundColor = UIColor.whiteColor()
fadeView.alpha = 0.4
self.view.addSubview(fadeView)
self.view.addSubview(activityView)
activityView.hidesWhenStopped = true
activityView.center = self.view.center
activityView.startAnimating()
DispatchQueue.global(qos: DispatchQoS.QoSClass.background).async {
fetchPosts()
}
DispatchQueue.main.async {
UIView.animate(withDuration: 1, delay: 1, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseInOut, animations: {
self.collectionView?.reloadData()
self.collectionView?.alpha = 1
fadeView.removeFromSuperview()
self.activityView.stopAnimating()
}, completion: nil)
}
}