[英]UIView Subclass Set Own Height + Constraints In UIViewController + Storyboard in Swift
我有一個UIViewController子類,它包含一個UITableView,一個名為ICYCollapsableInputView的UIView的子類,以及另一個名為ICYHeaderVIew的UIView子類。
ICYHeaderView是截圖中顯示的圓形外觀UIView。 它包含一個圓形按鈕 - 帶有綠色“添加”(+)按鈕的按鈕。
ICYCollapsableInputView是一個現在具有UITextField和Save按鈕的視圖。 我希望能夠通過調用ICYCollapsableInputView的相應函數從UIViewController展開和折疊此視圖。
當用戶點擊ICYHeaderView上的圓形按鈕時,ICYCollapsableInputView應該在高度上擴展,按下UITableView。 我有ICYCollapsableInputView擴展和折疊,但我無法弄清楚如何讓UITableView響應更改。 (見動畫)
我用紅色背景為xib中的主視圖着色,並在其中添加了藍色背景的視圖(參見屏幕截圖)
我可以使用自己的高度約束來調整ICYCollapsableInputView(如代碼和動畫中所示),但是UITableView約束似乎忽略它。
以下是ICYCollapsableInputView的代碼:
class ICYCollapsableInputView: UIView {
var view: UIView!
@IBOutlet weak var heightConstraint: NSLayoutConstraint!
@IBInspectable public var collapsedHeight: CGFloat = 150 {
didSet {
self.heightConstraint.constant = collapsedHeight
}
}
@IBInspectable public var expandedHeight: CGFloat = 250 {
didSet {
self.heightConstraint.constant = expandedHeight
}
}
// MARK: - Init
func loadFromNib() -> UIView {
let bundle = Bundle(for: type(of: self))
let nib = UINib(nibName: "ICYCollapsableInputView", bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
return view
}
override init(frame: CGRect) {
// 1. setup any properties here
// 2. call super.init(frame:)
super.init(frame: frame)
// 3. Setup view from .xib file
xibSetup()
}
required init?(coder aDecoder: NSCoder) {
// 1. setup any properties here
// 2. call super.init(coder:)
super.init(coder: aDecoder)
// 3. Setup view from .xib file
xibSetup()
}
func xibSetup() {
view = loadFromNib()
view.frame = bounds
view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
addSubview(view)
self.heightConstraint.constant = self.collapsedHeight
var rect = self.frame
rect.size.height = self.collapsedHeight
self.frame = rect
self.view.frame = rect
}
func revealInputView() {
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.3, initialSpringVelocity: 0, options: .curveEaseInOut, animations: {
var rect = self.frame
rect.size.height = self.expandedHeight
self.frame = rect
self.heightConstraint.constant = self.expandedHeight
self.view.layoutIfNeeded()
}, completion: nil)
}
func closeInputView() {
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.3, initialSpringVelocity: 0, options: .curveEaseInOut, animations: {
self.heightConstraint.constant = self.collapsedHeight
var rect = self.frame
rect.size.height = self.collapsedHeight
self.frame = rect
self.view.layoutIfNeeded()
}, completion: nil)
}
}
所有你需要的只是改變高度限制。
func revealInputView() {
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.3, initialSpringVelocity: 0, options: .curveEaseInOut, animations: {
self.heightConstraint.constant = self.expandedHeight //or 250
self.view.layoutIfNeeded()
}, completion: nil)
}
func closeInputView() {
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.3, initialSpringVelocity: 0, options: .curveEaseInOut, animations: {
self.heightConstraint.constant = self.collapsedHeight //or 150
self.view.layoutIfNeeded()
}, completion: nil)
}
故事板中的約束應該遵循
對於inputVW
Trailaing space to superview - 0,Leading space to superview - 0,top space to superview - 0,bottom space to tableview - 0
對於TableView
頂部空間輸入Vw - 0,前導空間到超級視圖 - 0,尾部空間到超級視圖 - 0,底部空間到超級視圖 - 0
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