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TIPullToRefresh
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Поправил создание констрейнтов

This commit is contained in:
Mikhail Konovalov 2018-01-11 13:00:36 +03:00
parent db5402288b
commit 99fa1ae686
1 changed files with 16 additions and 10 deletions
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26
Classes/RMRPullToRefreshController.swift
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@ -69,23 +69,29 @@ open class RMRPullToRefreshController: NSObject {
}
private func addBackgroundViewConstraints(_ backgroundView: UIView) {
// Constraints
self.backgroundViewHeightConstraint = NSLayoutConstraint(item: backgroundView, attribute: NSLayoutAttribute.height, relatedBy: NSLayoutRelation.equal, toItem: nil, attribute: NSLayoutAttribute.notAnAttribute, multiplier: 1, constant: 0)
backgroundView.addConstraint(self.backgroundViewHeightConstraint!)
guard let scrollView = scrollView, let position = position else {
return
}
let backgroundViewHeightConstraint = backgroundView.heightAnchor.constraint(equalToConstant: 0)
backgroundViewHeightConstraint.isActive = true
self.backgroundViewHeightConstraint = backgroundViewHeightConstraint
scrollView?.addConstraint(NSLayoutConstraint(item: backgroundView, attribute: NSLayoutAttribute.width, relatedBy: NSLayoutRelation.equal, toItem: scrollView, attribute: NSLayoutAttribute.width, multiplier: 1, constant: 0))
backgroundView.widthAnchor.constraint(equalTo: scrollView.widthAnchor).isActive = true
if position == .top {
scrollView?.addConstraint(NSLayoutConstraint(item: backgroundView, attribute: NSLayoutAttribute.bottom, relatedBy: NSLayoutRelation.equal, toItem: scrollView, attribute: NSLayoutAttribute.top, multiplier: 1, constant: 0))
} else if position == .bottom, let scrollView = self.scrollView {
switch position {
case .top:
backgroundView.bottomAnchor.constraint(equalTo: scrollView.topAnchor).isActive = true
case .bottom:
let constant = max(scrollView.contentSize.height, scrollView.bounds.height)
self.backgroundViewTopConstraint = NSLayoutConstraint(item: backgroundView, attribute: NSLayoutAttribute.top, relatedBy: NSLayoutRelation.equal, toItem: scrollView, attribute: NSLayoutAttribute.top, multiplier: 1, constant: constant)
scrollView.addConstraint(self.backgroundViewTopConstraint!)
let backgroundViewTopConstraint = backgroundView.topAnchor.constraint(
equalTo: scrollView.bottomAnchor, constant: constant)
backgroundViewTopConstraint.isActive = true
self.backgroundViewTopConstraint = backgroundViewTopConstraint
}
}
private func configureHeight() {
if let scrollView = self.scrollView {
self.originalTopInset = scrollView.contentInset.top
self.originalBottomInset = scrollView.contentInset.bottom