如何在pdf视图上移动/拖动多个视图?

如何解决如何在pdf视图上移动/拖动多个视图?

我正在做的是,我查看了pdf视图,其中包含一个pdf示例。 最重要的是,当用户单击导航栏中的“添加”按钮时,我要添加1个以上的签署者(自定义视图)视图。

场景1 :当在pdf上添加第一个Signatory视图(customview)时,它正在添加add,并且我可以在pdf上拖动/移动该第一个Signatory视图(Signatory1),效果很好。 / p>

场景2 :在pdf上添加第二个Signatory视图(Signatory2 customview)时,它是添加的,我可以在pdf上拖动/移动该第二个Signature视图(Signatory2),这也很好用,但在这种情况下,我无法移动/拖动第一个签名者视图(Signatory1)

场景3 :类似地,当在pdf上添加第三个Signatory视图(Signatory3 customview)时,它是添加的,我可以在pdf上拖动/移动该第三个Signatory视图(Signatory3),这也很好,但是在这种情况下,我无法移动/拖动第一个签名者视图(Signatory1)和第二个签名者视图(Signatory2),等等。

问题是,我只能访问当前的签署人(我只能移动/拖动最近添加的当前签署人视图),我无法移动/拖动旧的签署人视图。

当我在pdf视图上单击/触摸(拖动/移动)任何特定的Signature视图时,如何根据我的选择移动/拖动任何Signature?

这是一些代码,

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    
        customView1 = SignatoryXibView(frame: CGRect(x: 30,y: 30,width: 112,height: 58))
        customView2 = SignatoryXibView(frame: CGRect(x: 30,height: 58))
        customView3 = SignatoryXibView(frame: CGRect(x: 30,height: 58))
        customView4 = SignatoryXibView(frame: CGRect(x: 30,height: 58))
        customView5 = SignatoryXibView(frame: CGRect(x: 30,height: 58))
        
        loadPdf()
    
    }
    
    func loadPdf(){
        
        if let path = Bundle.main.path(forResource: "appointment-letter",ofType: "pdf") {
            if let pdfDocument = PDFDocument(url: URL(fileURLWithPath: path)) {
                pdfView.displayMode =  .singlePage // .singlePage //.singlePageContinuous //.twoUp
                //by default display mode is - singlePageContinuous
                pdfView.autoScales = true
                pdfView.displayDirection = .vertical // .horizontal//.vertical
                pdfView.document = pdfDocument
            
                pdfView.autoresizingMask = [.flexibleWidth,.flexibleHeight,.flexibleTopMargin,.flexibleBottomMargin]
                pdfView.zoomIn(self)
                pdfView.autoScales = true
                pdfView.backgroundColor = UIColor.white

                //Imp line
                pdfView.usePageViewController(true,withViewOptions: [:])
                
                currentPageNumberOfPdf = self.pdfView.currentPage?.pageRef?.pageNumber ?? 0
                print("Total Pages in PDF : ",pdfDocument.pageCount);
                
                self.pdfView.bringSubviewToFront(customView1!)
            }
        }
        
    }

 @IBAction func addSignatoryButtonClicked(_ sender: Any) {
        
        signatoryCount = signatoryCount + 1
        
        if signatoryCount == 1 {
            customView1?.signatoryLabel.text = "Signatory \(signatoryCount)"
            self.pdfView.addSubview(customView1!)
        }
        else  if signatoryCount == 2 {
            customView2?.signatoryLabel.text = "Signatory \(signatoryCount)"
            self.pdfView.addSubview(customView2!)
        }
        else  if signatoryCount == 3 {
            customView3?.signatoryLabel.text = "Signatory \(signatoryCount)"
            self.pdfView.addSubview(customView3!)
        }
        else  if signatoryCount == 4 {
            customView4?.signatoryLabel.text = "Signatory \(signatoryCount)"
            self.pdfView.addSubview(customView4!)
        }
        else  if signatoryCount == 5 {
            customView5?.signatoryLabel.text = "Signatory \(signatoryCount)"
            self.pdfView.addSubview(customView5!)
        }
    }
    

    
    override func touchesMoved(_ touches: Set<UITouch>,with event: UIEvent?) {
        
        let touch = touches.first
        let touchLocation = touch?.location(in: self.pdfView)
       // customView1?.center =  touchLocation!
       
        
        if signatoryCount == 1 {
            customView1?.center = touchLocation!
            return
        }
        else  if signatoryCount == 2 {
            customView2?.center = touchLocation!
            return
        }
        else  if signatoryCount == 3 {
            customView3?.center = touchLocation!
            return
        }
        else  if signatoryCount == 4 {
            customView4?.center = touchLocation!
            return
        }
        else  if signatoryCount == 5 {
           customView5?.center = touchLocation!
           return
        }
    
       // frame = view.convert(customView1!.frame,from: pdfView)
       // print("touchesMoved \(frame!.dictionaryRepresentation)")
    
    }

Here is the complete project source code

解决方法

您已经很接近了。您只需要应用与我在last question中建议的方法相同,但要尊重超级视图的框架。

首先将那些助手添加到您的项目中


extension  CGPoint {
    static func +(lhs: CGPoint,rhs: CGPoint) -> CGPoint {
        .init(x: lhs.x + rhs.x,y: lhs.y + rhs.y)
    }
    static func +=(lhs: inout CGPoint,rhs: CGPoint) {
        lhs.x += rhs.x
        lhs.y += rhs.y
    }
}

extension UIView {
    func translate(_ translation: CGPoint) {
        let destination = center + translation
        let minX = frame.width/2
        let minY = frame.height/2
        let maxX = superview!.frame.width-minX
        let maxY = superview!.frame.height-minY
        center = CGPoint(
            x: min(maxX,max(minX,destination.x)),y: min(maxY,max(minY,destination.y)))
    }
}

第二个方法是摆脱ViewController中的平移手势识别器和相应的方法。

第三次将SignatoryXibView平移手势更改为以下手势。这将平移视图的中心并尊重其视图的框架:

@objc func pan(_ gesture: UIPanGestureRecognizer) {
    translate(gesture.translation(in: self))
    gesture.setTranslation(.zero,in: self)
    setNeedsDisplay()
}

sample project

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