我是AsyncDisplayKit的新手。因此,我创建了一个新应用,以根据我的真实项目代码学习AsyncDisplayKit animationTransition。 显示/隐藏动画效果完美,但是我不知道为什么在孩子隐藏时父节点(ASDisplayNode)不重新调整布局(对不起,如果我的英语不好)
我已经尝试将setNeedsLayout()放在transitionLayout measurementCompletion上,但是没有任何变化
import AsyncDisplayKit
class HomeView: ASDisplayNode {
let topWrapperNode: TopWrapperNode
let loginButtonNode: LoginButtonNode
override required init() {
self.topWrapperNode = TopWrapperNode()
self.loginButtonNode = LoginButtonNode()
super.init()
self.automaticallyManagesSubnodes = true
self.automaticallyRelayoutOnSafeAreaChanges = true
self.insetsLayoutMarginsFromSafeArea = true
}
override func layoutSpecThatFits(_ constrainedSize: ASSizeRange) -> ASLayoutSpec {
let verticalStackSpec = ASStackLayoutSpec.vertical()
verticalStackSpec.children = [
self.topWrapperNode,
self.loginButtonNode
]
verticalStackSpec.alignItems = .stretch
verticalStackSpec.justifyContent = .spaceBetween
let displayInset = ASInsetLayoutSpec(
insets: UIEdgeInsets(top: 0, left: 32, bottom: 16, right: 32),
child: verticalStackSpec
)
return ASInsetLayoutSpec(insets: safeAreaInsets, child: displayInset)
}
func keyboardShowUpdateLayout(keyboardHeight: CGFloat) {
// self.topWrapperNode.hideWelcomeLabelNode()
}
func keyboardHideUpdateLayout() {
// self.topWrapperNode.showWelcomeLabelNode()
}
}
// MARK - TopWrapperNode
class TopWrapperNode: ASDisplayNode {
let welcomeLabelNode: WelcomeLabelNode
// let textFieldNode: TextFieldNode
override required init() {
welcomeLabelNode = WelcomeLabelNode()
// textFieldNode = TextFieldNode()
super.init()
self.automaticallyManagesSubnodes = true
self.autoresizesSubviews = true
}
override func layoutSpecThatFits(_ constrainedSize: ASSizeRange) -> ASLayoutSpec {
let verticalStackSpec = ASStackLayoutSpec.vertical()
verticalStackSpec.children = [
self.logoImage,
self.welcomeLabelNode,
// self.textFieldNode,
]
verticalStackSpec.alignItems = .stretch
verticalStackSpec.justifyContent = .spaceBetween
self.backgroundColor = .yellow
let displayInset = ASInsetLayoutSpec(
insets: UIEdgeInsets(top: 24, left: 0, bottom: 0, right: 0),
child: verticalStackSpec
)
return ASInsetLayoutSpec(insets: safeAreaInsets, child: displayInset)
}
private let logoImage: ASImageNode = {
let imageNode = ASImageNode()
imageNode.image = UIImage(named: "logo")
imageNode.frame.size = CGSize(
width: CGFloat(SizeScaler().moderateScale(size: 98)),
height: CGFloat(SizeScaler().moderateScale(size: 48))
)
imageNode.contentMode = .scaleAspectFill
imageNode.style.alignSelf = .center
return imageNode
}()
func hideWelcomeLabelNode() {
self.welcomeLabelNode.setHide(visibility: true)
self.welcomeLabelNode.transitionLayout(withAnimation: true, shouldMeasureAsync: false)
}
func showWelcomeLabelNode() {
self.welcomeLabelNode.setHide(visibility: false)
self.welcomeLabelNode.transitionLayout(withAnimation: true, shouldMeasureAsync: false)
}
}
// MARK: - WelcomeLabel
class WelcomeLabelNode: ASDisplayNode {
var isHide: Bool = false
override required init() {
super.init()
self.automaticallyManagesSubnodes = true
self.autoresizesSubviews = true
self.shouldAnimateSizeChanges = true
}
override func layoutSpecThatFits(_ constrainedSize: ASSizeRange) -> ASLayoutSpec {
let verticalStackSpec = ASStackLayoutSpec.vertical()
verticalStackSpec.children = [self.welcomeTitleLabel, self.welcomeDescLabel]
verticalStackSpec.alignItems = .start
self.backgroundColor = .green
return ASInsetLayoutSpec(
insets: UIEdgeInsets(top: 0, left: 0, bottom: 40, right: 0),
child: verticalStackSpec
)
}
override func animateLayoutTransition(_ context: ASContextTransitioning) {
if (self.isHide) {
let initialTitle = context.initialFrame(for: self.welcomeTitleLabel)
let initialDesc = context.initialFrame(for: self.welcomeDescLabel)
self.welcomeTitleLabel.alpha = 1
self.welcomeTitleLabel.frame = initialTitle
self.welcomeDescLabel.alpha = 1
self.welcomeDescLabel.frame = initialDesc
var finalTitle = context.finalFrame(for: self.welcomeTitleLabel)
finalTitle.origin.y -= 50
var finalDesc = context.finalFrame(for: self.welcomeDescLabel)
finalDesc.origin.y -= 50
UIView.animate(withDuration: 0.4, animations: {
self.welcomeTitleLabel.alpha = 0
self.welcomeTitleLabel.frame = finalTitle
self.welcomeDescLabel.alpha = 0
self.welcomeDescLabel.frame = finalDesc
}, completion: { finished in
context.completeTransition(finished)
})
} else {
var finalTitle = context.finalFrame(for: self.welcomeTitleLabel)
finalTitle.origin.y -= 50
var finalDesc = context.finalFrame(for: self.welcomeDescLabel)
finalDesc.origin.y -= 50
self.welcomeTitleLabel.alpha = 0
self.welcomeTitleLabel.frame = finalTitle
self.welcomeDescLabel.alpha = 0
self.welcomeDescLabel.frame = finalDesc
let initialTitle = context.initialFrame(for: self.welcomeTitleLabel)
let initialDesc = context.initialFrame(for: self.welcomeDescLabel)
UIView.animate(withDuration: 0.4, animations: {
self.welcomeTitleLabel.alpha = 1
self.welcomeTitleLabel.frame = initialTitle
self.welcomeDescLabel.alpha = 1
self.welcomeDescLabel.frame = initialDesc
}, completion: { finished in
context.completeTransition(finished)
})
}
}
let welcomeTitleLabel: QlueWorkLabel = {
let label = QlueWorkLabel()
label.setFont34(text: "Selamat datang!", fontType: "medium")
label.textContainerInset = UIEdgeInsets(top: 32, left: 0, bottom: 8, right: 0)
label.style.flexGrow = 1
label.style.flexShrink = 1
label.backgroundColor = .cyan
return label
}()
let welcomeDescLabel: QlueWorkLabel = {
let label = QlueWorkLabel()
label.setFont16or20(
text: "Pantau pekerjaanmu lebih mudah dengan QlueWork",
fontType: "regular"
)
label.style.flexGrow = 1
label.style.flexShrink = 1
label.backgroundColor = .blue
return label
}()
func setHide(visibility: Bool) {
self.isHide = visibility
}
}
我希望子级像flexBox一样隐藏/显示时,父级节点重新调整布局。 谁能帮我或告诉我为什么做错了吗?
答案 0 :(得分:0)
渲染完成后,您不能指望parentNode
会通过更改其子尺寸进行调整
但是您可以围绕着问parentNode
来重新渲染自己
像这样
DispatchQueue.main.async{
parentNode.transitionLayout(withAnimation: false,
shouldMeasureAsync: true,
measurementCompletion: nil)
}
确保在transitionLayout
上运行main thread
快乐纹理