标签: uiview

我想实现一个类似于滑块的功能。例如，按钮跟随手指从左向右移动。\n如下所示：\n

我应该使用 UISwipeGestureRecognizer。或者 UIPanGestureRecognizer\xef\xbc\x9f\n我使用了滑动手势但我不知道如何更新框架。

var swipeRight = UISwipeGestureRecognizer(target: self, action: \n#selector(self.respondToSwipeGesture(sender:)))\nswipeView.isUserInteractionEnabled = true\nswipeView.addGestureRecognizer(swipeRight)\n

我花了很长时间尝试堆叠以编程方式创建的视图。我以编程方式查看了在 UIStackView 中添加视图的示例，但这不起作用。下面列出的是代码，我setUpListings从视图控制器调用。有两个条目，但仅显示一个条目。

import UIKit
import SnapKit

class ListingsView : UIView {
    var containerView: UIView!
    var listingsContainerView: UIStackView!

    init() {
        super.init(frame: CGRect.zero)
        setUpContainerView()
        setUpListingsContainer()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    func setUpContainerView() {
        containerView = UIView()

        self.addSubview(containerView)

        containerView.snp.makeConstraints { (make) in
            make.height.equalTo(self)
            make.width.equalTo(self)

            containerView.backgroundColor = UIColor.white
        }
    }

    func setUpListingsContainer() {
        listingsContainerView = UIStackView()
        listingsContainerView.distribution = .equalSpacing
        listingsContainerView.alignment = .fill
        listingsContainerView.axis = .vertical
        listingsContainerView.spacing = 10
        listingsContainerView.translatesAutoresizingMaskIntoConstraints = false

        containerView.addSubview(listingsContainerView)

        listingsContainerView.snp.makeConstraints { (make) …

我尝试使用 lineDashPattern 创建一个仅在角落有边框（qrCode 样式）的视图，但线之间的空间似乎与我定义的模式不匹配。这是我的游乐场：

override func loadView() {
    let view = UIView()
    view.backgroundColor = .white
    let myView = UIView(frame: CGRect(x: 50, y: 50, width: 200, height: 200))
    myView.backgroundColor = .black
    let borderLayer = CAShapeLayer()
    let d = (myView.bounds.width / 2) as NSNumber
    borderLayer.strokeColor = UIColor.blue.cgColor
    borderLayer.lineDashPattern = [d]
    borderLayer.frame = myView.bounds
    borderLayer.fillColor = nil
    borderLayer.lineWidth = 10
    borderLayer.strokeStart = 0.1
    //borderLayer.lineDashPhase = -80
    borderLayer.path = UIBezierPath(roundedRect: myView.bounds, byRoundingCorners: .allCorners, cornerRadii: CGSize(width: 30, height: 30)).cgPath
    borderLayer.lineCap = CAShapeLayerLineCap.round
    myView.layer.addSublayer(borderLayer)
    view.addSubview(myView)
    self.view …

我很难理解convert(_:to:)和之间的区别convert(_:from:)由于某种原因，

假设我有两种观点（superView和subview）和一个根视图：

let superView = UIView(frame: CGRect(origin: .init(x: 25, y: 25), size: CGSize(width: 100, height: 100)))\nrootView.addSubview(view)\n\nlet subview = UIView(frame: CGRect(origin: .init(x: 25, y: 25), size: .init(width: 50, height: 50)))\nsuperView.addSubview(subview)\n

convert(_:to:)根据文档，将接收器\xe2\x80\x99s 坐标系中的点转换为指定视图的点：

let convertToWindow = subview.convert(subview.bounds, to: window)\n// {x 50 y 50 w 50 h 50 }\n

convert(_:from:)根据文档，将给定视图的坐标系中的点转换为接收器的坐标系：

let convertFromWindow = subview.convert(subview.bounds, from: window)\n// {x -50 y -50 w 50 h …

嘿，

我正在尝试通过更改拇指图像并在图片上添加标签来自定义滑块。为此，在我的视图中，我设置了滑块拇指的图像：

class SliderView: NibLoadingView {
    @IBOutlet weak var slider: ThumbTextSlider!
   
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        contentView = legacyLoadXib()
        setup()
    }
    
    override func setup() {
        super.setup()
        
        self.slider.setThumbImage(UIImage(named: "onb_cc_slider_thumb")!, for: .normal)
        self.slider.thumbTextLabel.font = UIFont(name: Fonts.SanFranciscoDisplayRegular, size: 14)
    }
}

在 ThumbTextSlider 类中，我设置文本标签如下：

class ThumbTextSlider: UISlider {
    var thumbTextLabel: UILabel = UILabel()
    
    private var thumbFrame: CGRect {
        return thumbRect(forBounds: bounds, trackRect: trackRect(forBounds: bounds), value: value)
    }
    override func layoutSubviews() {
        super.layoutSubviews()
        thumbTextLabel.frame = thumbFrame
    }
    
    override func awakeFromNib() {
        super.awakeFromNib() …

这是一种将子视图固定到UIView实例的方法。请原谅凌乱的代码，我一直在尝试让它工作。

open static func withEmbeddedView(_ view: UIView, andFixedHeight height: CGFloat) -> PMGAlertControllerEmbedComponent {
    let base = PMGAlertControllerEmbedComponent(frame: CGRect.zero)
    base.addSubview(view)
    view.translatesAutoresizingMaskIntoConstraints = false
    base.translatesAutoresizingMaskIntoConstraints = false

    let left = NSLayoutConstraint(item: view, attribute: .left, relatedBy: .equal, toItem: base, attribute: .left, multiplier: 1, constant: 0)
    let right = NSLayoutConstraint(item: view, attribute: .right, relatedBy: .equal, toItem: base, attribute: .right, multiplier: 1, constant: 0)
    let top = NSLayoutConstraint(item: view, attribute: .top, relatedBy: .equal, toItem: base, attribute: .top, multiplier: 1, constant: 0)
    let bottom …

我有一个 UIView，它是我的 VC 的视图（self.view），其中我添加了另一个 UIView 作为子视图，它们看起来都像一个正方形。我想限制子视图在父视图中的移动。基本上子视图不应该超出超级视图的范围。
我确实实施了

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { 
// i check if point of touch is inside my superview i set the center i.e
UITouch *touch = [[UITouch allObjects] firstObject];
if (CGRectContainsPoint(subview.frame, [touch locationInView:self.view])) {
// set the center here... i.e
subview.center = [touch locationInView:self.view];
}

这有效并且子视图正在移动，但它也会移动到超视图之外；如何仅限制超级视图内的移动？

我什至尝试过类似的东西。

if (CGRectContainsRect(self.view.bounds, subview.frame)) {
// this condition works but i don't know why my subview sticks to the sides of superview if i try to drag it …

如何设置自定义视图MKAnnotationView？我希望我的地图图钉通过UIView. 该UIView子类中可能有我想要自定义的其他视图。

网上有很多关于如何设置注释图像的示例，但没有如何实际更改该注释：

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView?
    {
        if !(annotation is MKPointAnnotation) {
            return nil
        }

        let annotationIdentifier = "AnnotationIdentifier"
        var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(annotationIdentifier)

        if annotationView == nil {
            annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
            annotationView!.canShowCallout = true
        }
        else {
            annotationView!.annotation = annotation
        }

        let pinImage = UIImage(named: "customPinImage")
        annotationView!.image = pinImage

       return annotationView   
    }

我创建了一个自定义 UIView 并为其设置了一个协议。现在，当我将委托设置为 self 时，从视图控制器中我得到一个 EXC_BAD_ACCESS。

---视图控制器代码------

class VerificationController: UIViewController, LoadingViewDelegate {
   @IBOutlet weak var instructionView: LoadingView!

   override func viewDidLoad() {
       super.viewDidLoad()           
       instructionView.randomTextIndexes = [1]
       instructionView.delegate = self 
   }

   ...
}

// "instructionView" is the UIView outlet and "LoadingView" is the class

--这是自定义查看代码 ------

protocol LoadingViewDelegate {
    func generated(random code:String)
}

class LoadingView: UIView {  
    var delegate:LoadingViewDelegate?
    var randomTextIndexes:[Int] = []
}

EXC_BAD_ACCESS当我尝试访问委托以及randomTextIndexes来自viewDidLoad()视图控制器的方法时，我得到了。你能告诉我我在这里缺少什么吗？

我无法加载我的子视图。我将它们定义为弱WKWebKit插座。如果我这样做view = tickerView或view = graphView，它的工作原理，但它只加载其中之一。我想加载两者。我该怎么做？

    override func loadView() {

        tickerView = WKWebView()
        tickerView.navigationDelegate = self
        self.view.addSubview(tickerView)


        graphView = WKWebView()
        graphView.navigationDelegate = self
        self.view.addSubview(graphView)

    }