Xcode Swift: 无法关闭弹出图像

Question

我创建了一个 ViewController，它通过 JSON 解析三个单独的 UIImageViews 来显示三个图像和其他信息。当您单击任何图像时，它会将您带到另一个 ViewController，它会在背景中弹出一个 UIScrollView，一个 UIImageView 链接到所有三个图像，一个 Button 将关闭弹出窗口 ViewController 并将其返回到上一个。这里有一个screenshot。我遇到的问题是我添加了这段代码：

func removeZoom()
    {
        UIView.animateWithDuration(0.25, animations: {
            self.view.transform = CGAffineTransformMakeScale(1.3, 1.3)
            self.view.alpha = 0.0;
            }, completion:{(finished : Bool)  in
                if (finished)
                {
                    self.view.removeFromSuperview()
                }
        });
    }

    @IBAction func closeZoom(sender: AnyObject) {

        self.navigationController?.popToRootViewControllerAnimated(true)

    }

当我尝试点击关闭按钮时，没有任何反应。不知道我错过了什么。任何指导都会有所帮助。

我将在此处放置两个控制器的代码：

JnsDetail.swift

import Foundation
import UIKit

class JnsDetail: UIViewController {

    @IBOutlet var tituloLabel : UILabel!
    @IBOutlet var marcaLabel : UILabel!
    @IBOutlet var colorLabel : UILabel!
    @IBOutlet var tipoLabel : UILabel!
    @IBOutlet var refLabel : UILabel!

    @IBOutlet var imageView : UIImageView!
    @IBOutlet var imageView2 : UIImageView!
    @IBOutlet var imageView3 : UIImageView!

    @IBOutlet var backbutton : UIButton!

    var jsonextrct : JsonExtrct!

    var photos : [String]!

    var transitionOperator = TransitionOperator()

    override func viewDidLoad() {
        super.viewDidLoad()

        //titulo = jsonextrct.titulo

        tituloLabel.font = UIFont(name: mTheme.fontName, size: 21)
        tituloLabel.textColor = UIColor.blackColor()
        tituloLabel.text = jsonextrct.titulo

        //marca = jsonextrct.marca

        marcaLabel.font = UIFont(name: mTheme.fontName, size: 21)
        marcaLabel.textColor = UIColor.blackColor()
        marcaLabel.text = jsonextrct.marca

        //color = jsonextrct.color

        colorLabel.font = UIFont(name: mTheme.fontName, size: 21)
        colorLabel.textColor = UIColor.blackColor()
        colorLabel.text = jsonextrct.color

        //tipo = jsonextrct.tipo

        tipoLabel.font = UIFont(name: mTheme.fontName, size: 21)
        tipoLabel.textColor = UIColor.blackColor()
        tipoLabel.text = jsonextrct.tipo

        //ref = jsonextrct.ref

        refLabel.font = UIFont(name: mTheme.fontName, size: 21)
        refLabel.textColor = UIColor.blackColor()
        refLabel.text = "\(jsonextrct.ref)"

        if let imageData = jsonextrct.imageData {
            imageView.image = UIImage(data: imageData)
        }else{
            Utils.asyncLoadJsonImage(jsonextrct, imageView: imageView)
        }
        //topImageViewHeightConstraint.constant = 240

        imageView.layer.borderColor = UIColor(white: 0.2, alpha: 1.0).CGColor
        imageView.layer.borderWidth = 0.5

        if let imageData2 = jsonextrct.imageData2 {
            imageView2.image = UIImage(data: imageData2)
        }else{
            Utils.asyncLoadJsonImage(jsonextrct, imageView2: imageView2)
        }

        imageView2.layer.borderColor = UIColor(white: 0.2, alpha: 1.0).CGColor
        imageView2.layer.borderWidth = 0.5

        if let imageData3 = jsonextrct.imageData3 {
            imageView3.image = UIImage(data: imageData3)
        }else{
            Utils.asyncLoadJsonImage(jsonextrct, imageView3: imageView3)
        }

        imageView3.layer.borderColor = UIColor(white: 0.2, alpha: 1.0).CGColor
        imageView3.layer.borderWidth = 0.5

        var tapGestureZoom = UITapGestureRecognizer(target: self, action: "zoomJns:")
        tapGestureZoom.numberOfTapsRequired = 1
        tapGestureZoom.numberOfTouchesRequired = 1
        imageView.userInteractionEnabled = true
        imageView.addGestureRecognizer(tapGestureZoom)

        var tapGestureZoom2 = UITapGestureRecognizer(target: self, action: "zoomJns2:")
        tapGestureZoom2.numberOfTapsRequired = 1
        tapGestureZoom2.numberOfTouchesRequired = 1
        imageView2.userInteractionEnabled = true
        imageView2.addGestureRecognizer(tapGestureZoom2)

        var tapGestureZoom3 = UITapGestureRecognizer(target: self, action: "zoomJns3:")
        tapGestureZoom3.numberOfTapsRequired = 1
        tapGestureZoom3.numberOfTouchesRequired = 1
        imageView3.userInteractionEnabled = true
        imageView3.addGestureRecognizer(tapGestureZoom3)

    }

    override func preferredStatusBarStyle() -> UIStatusBarStyle {
        return UIStatusBarStyle.Default
    }

    func backTapped(sender: AnyObject?){
        dismissViewControllerAnimated(true, completion: nil)
    }

    @IBAction func zoomJns(sender: AnyObject?){
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let controller = storyboard.instantiateViewControllerWithIdentifier("JnsZoomController") as! JnsZoomController
        self.modalPresentationStyle = UIModalPresentationStyle.Custom
        controller.transitioningDelegate = transitionOperator
        controller.jsonextrct = jsonextrct

        presentViewController(controller, animated: true, completion: nil)
    }

    @IBAction func zoomJns2(sender: AnyObject?){
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let controller = storyboard.instantiateViewControllerWithIdentifier("JnsZoomController") as! JnsZoomController
        self.modalPresentationStyle = UIModalPresentationStyle.Custom
        controller.transitioningDelegate = transitionOperator
        controller.jsonextrct = jsonextrct

        presentViewController(controller, animated: true, completion: nil)
    }

    @IBAction func zoomJns3(sender: AnyObject?){
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let controller = storyboard.instantiateViewControllerWithIdentifier("JnsZoomController") as! JnsZoomController
        self.modalPresentationStyle = UIModalPresentationStyle.Custom
        controller.transitioningDelegate = transitionOperator
        controller.jsonextrct = jsonextrct

        presentViewController(controller, animated: true, completion: nil)
    }

}

JnsZoomController.swift

import Foundation
import UIKit

class JnsZoomController : UIViewController {

    @IBOutlet var scrollView : UIScrollView!
    @IBOutlet var jnsImageView : UIImageView!
    @IBOutlet var jnsImageView2 : UIImageView!
    @IBOutlet var jnsImageView3 : UIImageView!

    var jsonextrct : JsonExtrct!

    override func viewDidLoad() {
        super.viewDidLoad()

        if let imageData = jsonextrct.imageData {

            let image = UIImage(data: imageData)
            jnsImageView.image = UIImage(data: imageData)
            //jnsImageView.bounds = CGRectMake(0, 0, image?.size.width, image?.size.height);
        }

        if let imageData2 = jsonextrct.imageData2 {

            let image2 = UIImage(data: imageData2)
            jnsImageView2.image = UIImage(data: imageData2)
            //jnsImageView2.bounds = CGRectMake(0, 0, image?.size.width, image?.size.height);
        }

        if let imageData3 = jsonextrct.imageData3 {

            let image3 = UIImage(data: imageData3)
            jnsImageView3.image = UIImage(data: imageData3)
            //jnsImageView3.bounds = CGRectMake(0, 0, image?.size.width, image?.size.height);
        }

        scrollView.contentSize = jnsImageView.frame.size
        scrollView.contentSize = jnsImageView2.frame.size
        scrollView.contentSize = jnsImageView3.frame.size

    }

    func removeZoom()
    {
        UIView.animateWithDuration(0.25, animations: {
            self.view.transform = CGAffineTransformMakeScale(1.3, 1.3)
            self.view.alpha = 0.0;
            }, completion:{(finished : Bool)  in
                if (finished)
                {
                    self.view.removeFromSuperview()
                }
        });
    }

    @IBAction func closeZoom(sender: AnyObject) {

        self.navigationController?.popToRootViewControllerAnimated(true)

    }
}

Answer 1

这是我看到的问题，如果您 "popping" 到根视图控制器，这意味着您必须将视图控制器推送到导航控制器的堆栈上，但我没有看到您将任何内容推送到导航堆栈。当然，除非出于某种原因 Apple 决定取消推送视图控制器，但我怀疑情况是否如此。因此，我在您的代码中看到的内容还有另一个问题。您只是通过呈现视图控制器来呈现视图控制器，如果您调用

     self.navigationController?.popToRootViewControllerAnimated(true)

那么导航控制器将不会从堆栈中删除堆栈中的任何内容，因为您将 viewcontroller 模态显示在另一个 viewcontroller 上，而没有在视图控制器的导航控制器中显示模态。

解决方案，也许，但这不是 100%，因为我没有你的代码在我面前。

改变这个：

     self.navigationController?.popToRootViewControllerAnimated(true)

像这样

self.dismissViewControllerAnimated(animated: true, completion:nil)

我不这样做 swift 所以我的解决方案是伪代码，请随意添加问号以及 Apple 出于某种原因认为没有价值的内容。

您也可以将您的演示文稿更改为：

self.navigationController?.presentViewController(controller, animated: true, completion: nil)

同样，上面是伪代码，但我想我把问号放在了正确的位置，这样它就可以完成它应该做的事情

此外，您可以参考这个，尽管 Apple 并没有真正彻底地告诉您高级导航堆栈的工作原理：

https://developer.apple.com/library/ios/documentation/UIKit/Reference/UINavigationController_Class/#//apple_ref/occ/instm/UINavigationController/pushViewController:animated:

有时您可能需要同时拥有 4-10 个导航控制器运行，因此请确保您了解它们如何与视图控制器交互，并确保您了解 POP、PUSH 和 PRESENT 的作用.祝你好运，祝你有美好的一天。

Answer 2

在关闭缩放中我认为你应该只使用

@IBAction func closeZoom(sender: AnyObject) {

    dismissViewControllerAnimated(true, completion: nil)

}

因为您展示了那个 View Controller，所以当您推送它时会使用 popToRootViewControllerAnimated(true)

Xcode Swift: 无法关闭弹出图像

Xcode Swift: Cannot close popup Image

xcode

uiscrollview

uiimageview

ios

swift