swift - 转到另一个 ImageView 以获取全尺寸图像

Question

我有一个照片 View Controller ，可以在表格 View 中显示图像。我正在寻求帮助来连接到 fullsizeimageview ImageView Controller 。我不知道该怎么做。

import UIKit
import Parse
import ParseUI

class PhotosViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    let arrSubCatData: NSMutableArray = [];

    @IBOutlet weak var tblPhotos: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationController?.navigationItem.title = "Photos"

        var tabBar : TabBarController = self.tabBarController as! TabBarController
        println(tabBar.parkInfo)


        self.tblPhotos.tableFooterView = UIView()

        var query = PFQuery(className: "MultiImages")

        query.whereKey("placeId", equalTo:tabBar.parkInfo?.valueForKey("objectId") as! String)

        query.findObjectsInBackgroundWithBlock {
            (objects: [AnyObject]?, error: NSError?) -> Void in
            if error == nil {
                // The find succeeded.
                self.arrSubCatData.addObjectsFromArray(objects!)
                self.tblPhotos?.reloadData();
            } else {
                // Log details of the failure
                println("Error: \(error!) \(error!.userInfo!)")
            }
        }

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("tableViewCell") as! UITableViewCell

        if let file:PFFile = (self.arrSubCatData.objectAtIndex(indexPath.row).valueForKey("image") as? PFFile) {
            file.getDataInBackgroundWithBlock {
                (imageData: NSData?, error: NSError?) -> Void in
                if error == nil {
                    if let imageData = imageData {
                        var imgView : UIImageView = cell.contentView.viewWithTag(100) as! UIImageView
                        imgView.image = UIImage(data:imageData)
                    }
                }
            }
        }
        return cell
    }

    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        self.performSegueWithIdentifier("segueToInfo", sender: indexPath.row)
    }

    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.arrSubCatData.count
    }

    func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    /*override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "showfullsizeimage" {
            if let indexPath = self.tableView.indexPathForSelectedRow() {
                let detailViewController = segue.destinationViewController as! PhotoFullSizeController
                detailViewController.detailItem = objects[indexPath.row]
            }
        }
    }
    */

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

我新创建的全尺寸图像 Controller 是这样的，带有segue标识符“fullsizeimageview”

import UIKit

class PhotoFullSizeController: UIViewController {

    @IBOutlet weak var fullImageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

Answer 1

首先，您应该将 TapGesture 添加到 imgView 中。

您的cellForRowIndexPath现在将如下:

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("tableViewCell") as! UITableViewCell

        if let file:PFFile = (self.arrSubCatData.objectAtIndex(indexPath.row).valueForKey("image") as? PFFile) {
            file.getDataInBackgroundWithBlock {
                (imageData: NSData?, error: NSError?) -> Void in
                if error == nil {
                    if let imageData = imageData {
                        var imgView : UIImageView = cell.contentView.viewWithTag(100) as! UIImageView
                      //Add Tap Gesture to the imgView
                        imgView.userInteractionEnabled = true;
                        let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("imageTapped"))
                        imgView.addGestureRecognizer(tapRecognizer)
                        imgView.image = UIImage(data:imageData)
                    }
                }
            }
        }
        return cell
    }

现在为 imageTapped 编写一个处理程序

 //When image is tapped
    func imageTapped()
    {
        println("image tapped")
        self.performSegueWithIdentifier("fullsizeimageview", sender: self)
    }

并且prepareForSegue将如下所示:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

        if(segue.identifier == "fullsizeimageview")
        {
            let destVC = (segue.destinationViewController as? PhotoFullSizeController)!
            let indexPath = self.tblPhotos.indexPathForSelectedRow() //IndexPath for selected table row
            if let file:PFFile = (self.arrSubCatData.objectAtIndex(indexPath!.row).valueForKey("image") as? PFFile) {
             destVC.imageFile = file

             }
        }
}

在您的PhotoFullSizeController Controller 中

class PhotoFullSizeController: UIViewController {

    @IBOutlet weak var fullImageView: UIImageView!
    var imageFile: PFFile!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Load image

        self.imageFile.getDataInBackgroundWithBlock {
            (imageData: NSData?, error: NSError?) -> Void in
            if error == nil {
                if let imageData = imageData {
                   //Set image in imageview
                    fullImageView.image = UIImage(data:imageData)
                }
            }
        }

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

如果有任何问题请告诉我。希望这会有所帮助!