我还是个SO和斯威夫特新手,所以,请耐心等待:-)
我有一个UIViewController
。
这里面viewcontroller
有一个UIScrollView
。
所述UIScrollView
内部有一个UIStackView
(在0,0,0,0与AutoLayout
钉扎和垂直和水平中心的),具有水平轴线。
我的目标是子视图添加到stackview,使滚动视图滚动水平。
所以,我做了以下内容:
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'")
}
}
问题是,有些事情我必须失去,因为滚动视图完全不滚动。我只看到一个观点(当然,随时随地用不同的颜色)。
我敢肯定的意见被加载,因为这是第二次打印输出:
[<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,什么是它发生?为什么滚动视图不滚动?
试试这个代码,我希望它可以帮助你。
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
}
替换此
let customView = UIView(frame: CGRect(x: 0, y: 0, width: 240, height: 128))
同
let customView = UIView(frame: CGRect(x: CGFloat( i * 240 ) , y: 0, width: 240, height: 128))
我认为没有必要为stackView,和
scroller.addSubview(customView)
看看这个Scroller