iOS UILabel 约束是否来自边距被破坏的代码?
Is iOS UILabel constraint from code with margin broken?
我正在尝试实现如下所示的弹出式布局:
这在带有边距和所有内容的情节提要中效果很好。在情节提要中它看起来像这样:
但是如果我在代码中进行相同的约束,我会得到这个结果:
标签的背景为浅蓝色,标签所在的视图为深蓝色背景。弹出背景有自己的边框。所以基本上弹出匹配 child 但 child 内的标签溢出 parent 和 grand parent 但只是因为它有边距......如果我删除边距它就会正确到边境!
我试过在代码中做出完全相同的约束。我非常愿意接受涉及自动调整宽度的其他建议。
我创建弹出窗口的代码:
func showPopup(caller: UIView) {
closePopups()
// setup view
currentPopup = UIView()
self.view.addSubview(currentPopup)
currentPopup.backgroundColor = UIColorFromHex(Constants.Colors.white, alpha: 1)
// setup constraints
currentPopup.translatesAutoresizingMaskIntoConstraints = false
// top constraint
let topSideConstraint = NSLayoutConstraint(item: currentPopup, attribute: .Top, relatedBy: .Equal, toItem: intoWordsBar.view, attribute: .Bottom, multiplier: 1.0, constant: 0)
self.view.addConstraint(topSideConstraint)
// setup child elements
var children = [PopupChildButton]()
let childOne = createChild("writing_strategy_1", parent: currentPopup, aboveChild: nil, hasBorder: true, feature: FeatureManager.BarFeature.WriteReadLetterName)
children.append(childOne)
let childTwo = createChild("writing_strategy_2", parent: currentPopup, aboveChild: children[0], hasBorder: true, feature: FeatureManager.BarFeature.WriteReadLetterSound)
children.append(childTwo)
let childThree = createChild("writing_strategy_3", parent: currentPopup, aboveChild: children[1], hasBorder: true, feature: FeatureManager.BarFeature.WriteReadWord)
children.append(childThree)
let childFour = createChild("writing_strategy_4", parent: currentPopup, aboveChild: children[2], hasBorder: false, feature: FeatureManager.BarFeature.WriteReadSentence)
children.append(childFour)
let parentSize = getWidth(caller)
//TODO MARK: <-- here working, need to add toggle function and graphics to childrens, documentation on methods, move to constructor class?
// setup rest of constraints
// add bottom constraint, equal to bottom of last child
let bottomSideConstraint = NSLayoutConstraint(item: currentPopup, attribute: .Bottom, relatedBy: .Equal, toItem: children[children.count-1], attribute: .Bottom, multiplier: 1.0, constant: 0)
self.view.addConstraint(bottomSideConstraint)
// left constraint
let leftSideConstraint = NSLayoutConstraint(item: currentPopup, attribute: .Left, relatedBy: .Equal, toItem: caller, attribute: .Right, multiplier: 1.0, constant: (-parentSize)/2)
self.view.addConstraint(leftSideConstraint)
// add border
currentPopup.addBorder(edges: [.All], colour: UIColorFromHex(Constants.Colors.dark_grey, alpha: 1), thickness: 1)
//TODO <-- last piece
//childOne.addTarget(self, action: #selector(KeyboardViewController.childClick(_:)), forControlEvents: .TouchUpInside)
//childTwo.addTarget(self, action: #selector(KeyboardViewController.childClick(_:)), forControlEvents: .TouchUpInside)
//childThree.addTarget(self, action: #selector(KeyboardViewController.childClick(_:)), forControlEvents: .TouchUpInside)
//childFour.addTarget(self, action: #selector(KeyboardViewController.childClick(_:)), forControlEvents: .TouchUpInside)
self.view.setNeedsLayout()
self.view.layoutIfNeeded()
}
我创建 child 的代码:
func createChild(text: String, parent: UIView, aboveChild: UIView?, hasBorder: Bool, feature: FeatureManager.BarFeature) -> PopupChildButton {
// setup child element
let childBtn = PopupChildButton()
childBtn.setRelatedFeature(feature)
// set the right background color
if intoWordsBar.getFeatureManager().isFeatureActive(feature) {
childBtn.backgroundColor = UIColorFromHex(Constants.Colors.light_blue, alpha: 1)
//childBtn.setImage(UIImage(named: "Checkmark"))
} else {
childBtn.backgroundColor = UIColorAndAlphaFromHex(Constants.Colors.transparent)//TODO Highlight implementation needs to be optimized, icon should be moved all the way to the left... somehow //TODO Add new checkmark icon
//childBtn.setImage(nil)
}
childBtn.translatesAutoresizingMaskIntoConstraints = false
parent.addSubview(childBtn)
// add constraints
// top constraint
if let aboveChild = aboveChild {
let topSideConstraint = NSLayoutConstraint(item: childBtn, attribute: .Top, relatedBy: .Equal, toItem: aboveChild, attribute: .Bottom, multiplier: 1.0, constant: 0)
parent.addConstraint(topSideConstraint)
} else {
let topSideConstraint = NSLayoutConstraint(item: childBtn, attribute: .Top, relatedBy: .Equal, toItem: parent, attribute: .Top, multiplier: 1.0, constant: 0)
parent.addConstraint(topSideConstraint)
}
// height constraint
let heightConstraint = NSLayoutConstraint(item: childBtn, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: CGFloat(Constants.Sizes.popupChildHeight))
parent.addConstraint(heightConstraint)
// left constraint
let leftSideConstraint = NSLayoutConstraint(item: parent, attribute: .Leading, relatedBy: .Equal, toItem: childBtn, attribute: .Leading, multiplier: 1.0, constant: 0)
parent.addConstraint(leftSideConstraint)
// right constraint
let rightSideConstraint = NSLayoutConstraint(item: parent, attribute: .Trailing, relatedBy: .Equal, toItem: childBtn, attribute: .Trailing, multiplier: 1.0, constant: 0)
parent.addConstraint(rightSideConstraint)
// add border
if hasBorder {
childBtn.addBorder(edges: .Bottom, colour: UIColorFromHex(Constants.Colors.dark_grey, alpha: 1), thickness: 1)
}
// create grandchildren
let label = UILabel()
// setup looks
label.textColor = UIColorFromHex(Constants.Colors.black, alpha: 1)
label.textAlignment = .Center
childBtn.backgroundColor = UIColorFromHex(Constants.Colors.dark_blue, alpha: 1)
label.backgroundColor = UIColorFromHex(Constants.Colors.light_blue, alpha: 1)
label.text = text.localized
label.translatesAutoresizingMaskIntoConstraints = false
childBtn.addSubview(label)
// add constraints
// left constraint label
let leftLabelConstraint = NSLayoutConstraint(item: label, attribute: .Left, relatedBy: .Equal, toItem: childBtn, attribute: .Left, multiplier: 1.0, constant: CGFloat(Constants.Sizes.popupMargin))
childBtn.addConstraint(leftLabelConstraint)
// right constraint label
let rightLabelConstraint = NSLayoutConstraint(item: label, attribute: .Right, relatedBy: .Equal, toItem: childBtn, attribute: .Right, multiplier: 1.0, constant: CGFloat(Constants.Sizes.popupMargin))
childBtn.addConstraint(rightLabelConstraint)
// top constraint
let labelTopSideConstraint = NSLayoutConstraint(item: label, attribute: .Top, relatedBy: .Equal, toItem: childBtn, attribute: .Top, multiplier: 1.0, constant: 0)
childBtn.addConstraint(labelTopSideConstraint)
// bottom constraint
//let labelBottomSideConstraint = NSLayoutConstraint(item: label, attribute: .Bottom, relatedBy: .Equal, toItem: childBtn, attribute: .Bottom, multiplier: 1.0, constant: 0)
//childBtn.addConstraint(labelBottomSideConstraint)
return childBtn
}
我正在尝试实现如下所示的弹出式布局:
这在带有边距和所有内容的情节提要中效果很好。在情节提要中它看起来像这样:
但是如果我在代码中进行相同的约束,我会得到这个结果:
标签的背景为浅蓝色,标签所在的视图为深蓝色背景。弹出背景有自己的边框。所以基本上弹出匹配 child 但 child 内的标签溢出 parent 和 grand parent 但只是因为它有边距......如果我删除边距它就会正确到边境!
我试过在代码中做出完全相同的约束。我非常愿意接受涉及自动调整宽度的其他建议。
我创建弹出窗口的代码:
func showPopup(caller: UIView) {
closePopups()
// setup view
currentPopup = UIView()
self.view.addSubview(currentPopup)
currentPopup.backgroundColor = UIColorFromHex(Constants.Colors.white, alpha: 1)
// setup constraints
currentPopup.translatesAutoresizingMaskIntoConstraints = false
// top constraint
let topSideConstraint = NSLayoutConstraint(item: currentPopup, attribute: .Top, relatedBy: .Equal, toItem: intoWordsBar.view, attribute: .Bottom, multiplier: 1.0, constant: 0)
self.view.addConstraint(topSideConstraint)
// setup child elements
var children = [PopupChildButton]()
let childOne = createChild("writing_strategy_1", parent: currentPopup, aboveChild: nil, hasBorder: true, feature: FeatureManager.BarFeature.WriteReadLetterName)
children.append(childOne)
let childTwo = createChild("writing_strategy_2", parent: currentPopup, aboveChild: children[0], hasBorder: true, feature: FeatureManager.BarFeature.WriteReadLetterSound)
children.append(childTwo)
let childThree = createChild("writing_strategy_3", parent: currentPopup, aboveChild: children[1], hasBorder: true, feature: FeatureManager.BarFeature.WriteReadWord)
children.append(childThree)
let childFour = createChild("writing_strategy_4", parent: currentPopup, aboveChild: children[2], hasBorder: false, feature: FeatureManager.BarFeature.WriteReadSentence)
children.append(childFour)
let parentSize = getWidth(caller)
//TODO MARK: <-- here working, need to add toggle function and graphics to childrens, documentation on methods, move to constructor class?
// setup rest of constraints
// add bottom constraint, equal to bottom of last child
let bottomSideConstraint = NSLayoutConstraint(item: currentPopup, attribute: .Bottom, relatedBy: .Equal, toItem: children[children.count-1], attribute: .Bottom, multiplier: 1.0, constant: 0)
self.view.addConstraint(bottomSideConstraint)
// left constraint
let leftSideConstraint = NSLayoutConstraint(item: currentPopup, attribute: .Left, relatedBy: .Equal, toItem: caller, attribute: .Right, multiplier: 1.0, constant: (-parentSize)/2)
self.view.addConstraint(leftSideConstraint)
// add border
currentPopup.addBorder(edges: [.All], colour: UIColorFromHex(Constants.Colors.dark_grey, alpha: 1), thickness: 1)
//TODO <-- last piece
//childOne.addTarget(self, action: #selector(KeyboardViewController.childClick(_:)), forControlEvents: .TouchUpInside)
//childTwo.addTarget(self, action: #selector(KeyboardViewController.childClick(_:)), forControlEvents: .TouchUpInside)
//childThree.addTarget(self, action: #selector(KeyboardViewController.childClick(_:)), forControlEvents: .TouchUpInside)
//childFour.addTarget(self, action: #selector(KeyboardViewController.childClick(_:)), forControlEvents: .TouchUpInside)
self.view.setNeedsLayout()
self.view.layoutIfNeeded()
}
我创建 child 的代码:
func createChild(text: String, parent: UIView, aboveChild: UIView?, hasBorder: Bool, feature: FeatureManager.BarFeature) -> PopupChildButton {
// setup child element
let childBtn = PopupChildButton()
childBtn.setRelatedFeature(feature)
// set the right background color
if intoWordsBar.getFeatureManager().isFeatureActive(feature) {
childBtn.backgroundColor = UIColorFromHex(Constants.Colors.light_blue, alpha: 1)
//childBtn.setImage(UIImage(named: "Checkmark"))
} else {
childBtn.backgroundColor = UIColorAndAlphaFromHex(Constants.Colors.transparent)//TODO Highlight implementation needs to be optimized, icon should be moved all the way to the left... somehow //TODO Add new checkmark icon
//childBtn.setImage(nil)
}
childBtn.translatesAutoresizingMaskIntoConstraints = false
parent.addSubview(childBtn)
// add constraints
// top constraint
if let aboveChild = aboveChild {
let topSideConstraint = NSLayoutConstraint(item: childBtn, attribute: .Top, relatedBy: .Equal, toItem: aboveChild, attribute: .Bottom, multiplier: 1.0, constant: 0)
parent.addConstraint(topSideConstraint)
} else {
let topSideConstraint = NSLayoutConstraint(item: childBtn, attribute: .Top, relatedBy: .Equal, toItem: parent, attribute: .Top, multiplier: 1.0, constant: 0)
parent.addConstraint(topSideConstraint)
}
// height constraint
let heightConstraint = NSLayoutConstraint(item: childBtn, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: CGFloat(Constants.Sizes.popupChildHeight))
parent.addConstraint(heightConstraint)
// left constraint
let leftSideConstraint = NSLayoutConstraint(item: parent, attribute: .Leading, relatedBy: .Equal, toItem: childBtn, attribute: .Leading, multiplier: 1.0, constant: 0)
parent.addConstraint(leftSideConstraint)
// right constraint
let rightSideConstraint = NSLayoutConstraint(item: parent, attribute: .Trailing, relatedBy: .Equal, toItem: childBtn, attribute: .Trailing, multiplier: 1.0, constant: 0)
parent.addConstraint(rightSideConstraint)
// add border
if hasBorder {
childBtn.addBorder(edges: .Bottom, colour: UIColorFromHex(Constants.Colors.dark_grey, alpha: 1), thickness: 1)
}
// create grandchildren
let label = UILabel()
// setup looks
label.textColor = UIColorFromHex(Constants.Colors.black, alpha: 1)
label.textAlignment = .Center
childBtn.backgroundColor = UIColorFromHex(Constants.Colors.dark_blue, alpha: 1)
label.backgroundColor = UIColorFromHex(Constants.Colors.light_blue, alpha: 1)
label.text = text.localized
label.translatesAutoresizingMaskIntoConstraints = false
childBtn.addSubview(label)
// add constraints
// left constraint label
let leftLabelConstraint = NSLayoutConstraint(item: label, attribute: .Left, relatedBy: .Equal, toItem: childBtn, attribute: .Left, multiplier: 1.0, constant: CGFloat(Constants.Sizes.popupMargin))
childBtn.addConstraint(leftLabelConstraint)
// right constraint label
let rightLabelConstraint = NSLayoutConstraint(item: label, attribute: .Right, relatedBy: .Equal, toItem: childBtn, attribute: .Right, multiplier: 1.0, constant: CGFloat(Constants.Sizes.popupMargin))
childBtn.addConstraint(rightLabelConstraint)
// top constraint
let labelTopSideConstraint = NSLayoutConstraint(item: label, attribute: .Top, relatedBy: .Equal, toItem: childBtn, attribute: .Top, multiplier: 1.0, constant: 0)
childBtn.addConstraint(labelTopSideConstraint)
// bottom constraint
//let labelBottomSideConstraint = NSLayoutConstraint(item: label, attribute: .Bottom, relatedBy: .Equal, toItem: childBtn, attribute: .Bottom, multiplier: 1.0, constant: 0)
//childBtn.addConstraint(labelBottomSideConstraint)
return childBtn
}