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[英]Add UIViews to UIStackView programmatically inside UITableView
[英]UIStackView programmatically filled with UIViews doesn't scroll inside UIScrollView
我還是SO和Swift的新手,所以請耐心等候:-)
我有一個UIViewController
。
在該viewcontroller
內部,有一個UIScrollView
。
在UIScrollView
有一個UIStackView
(固定在0,0,0,0處的AutoLayout
並在垂直和水平方向上居中),並帶有水平軸。
我的目標是將子視圖添加到stackview,並使scrollview水平滾動。
因此,我做了以下工作:
import UIKit
class ViewController: UIViewController, UIScrollViewDelegate {
@IBOutlet weak var scroller: UIScrollView!
@IBOutlet weak var stack: UIStackView!
override func viewDidLoad() {
super.viewDidLoad()
scroller.delegate = self
for i in 0..<10 {
let customView = UIView(frame: CGRect(x: 0, y: 0, width: 240, height: 128))
// .random is unimportant here
customView.backgroundColor = .random()
stack.addArrangedSubview(customView)
}
}
override func viewDidLayoutSubviews(){
self.scroller.contentSize = CGSize(width:2400,height:128)
print(self.scroller.contentSize) // 2400
print(self.stack.subviews)
}
func scrollViewDidScroll(_ scrollView: UIScrollView) {
print("scrollin'")
}
}
問題是我必須缺少某些東西,因為scrollview根本不滾動。 我只能看到一個視圖(當然,任何時候都可以使用不同的顏色)。
我確定視圖已加載,因為這是第二個打印輸出:
[<UIView: 0x159e01a10; frame = (0 0; 240 128); layer = <CALayer: 0x28115d7a0>>, <UIView: 0x159e03f10; frame = (0 0; 240 128); layer = <CALayer: 0x28115d800>>, <UIView: 0x159e046d0; frame = (0 0; 240 128); layer = <CALayer: 0x28115d960>>, <UIView: 0x159e0e410; frame = (0 0; 240 128); layer = <CALayer: 0x28115da80>>, <UIView: 0x159e0e7c0; frame = (0 0; 240 128); layer = <CALayer: 0x28115db20>>, <UIView: 0x159e0e9a0; frame = (0 0; 240 128); layer = <CALayer: 0x28115da60>>, <UIView: 0x159e0eb80; frame = (0 0; 240 128); layer = <CALayer: 0x28115dbe0>>, <UIView: 0x159e0ed60; frame = (0 0; 240 128); layer = <CALayer: 0x28115dc80>>, <UIView: 0x159e0ef40; frame = (0 0; 240 128); layer = <CALayer: 0x28115dd20>>, <UIView: 0x159e0f120; frame = (0 0; 240 128); layer = <CALayer: 0x28115ddc0>>]
那么,這是怎么回事? 為什么scrollview不滾動?
取代這個
let customView = UIView(frame: CGRect(x: 0, y: 0, width: 240, height: 128))
與
let customView = UIView(frame: CGRect(x: CGFloat( i * 240 ) , y: 0, width: 240, height: 128))
我認為不需要stackView,並且
scroller.addSubview(customView)
期待這個滾動條
試試這個代碼,希望對您有所幫助。
override func viewDidLoad() {
super.viewDidLoad()
scroller.delegate = self
for i in 0..<10 {
let xPosition = 240 * CGFloat(i)
let customView = UIView(frame: CGRect(x: xPosition, y: 0, width: 240, height: 128))
// .random is unimportant here
customView.backgroundColor = .random()
scroller.addSubview(customView)
}
scroller.contentSize.width = 2400
}
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