Question

我在视图控制器中有一个UICollectionView。当用户单击其中一个图像时，它将转到单独的页面以打开图像。我希望每次都不要回到画廊更换图片，向左或向右滑动以获得下一张或上一张图片。

我已经看到了做“pagingEnabled = true”的答案但是你把它放在哪里呢？

我是swift的新手。

以下是我的代码。我在这里先向您的帮助表示感谢。

ViewController.swift

import UIKit

class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate
{
@IBOutlet weak var collectionView: UICollectionView!

let appleProducts = ["iPhone", "Apple Watch", "Mac", "iPad"]
let imageArray = [UIImage(named: "pug"), UIImage(named: "pug2"), UIImage(named: "pug3"), UIImage(named: "pug4")]

override func viewDidLoad()
{
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

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

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
    return self.appleProducts.count
}

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
{

    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! CollectionViewCell

    cell.imageView?.image = self.imageArray[indexPath.row]

    cell.titleLabel?.text = self.appleProducts[indexPath.row]

    return cell

}

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
    self.performSegueWithIdentifier("showImage", sender: self)
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
    if segue.identifier == "showImage"
    {
        let indexPaths = self.collectionView!.indexPathsForSelectedItems()!
        let indexPath = indexPaths[0] as NSIndexPath
        let vc = segue.destinationViewController as! NewViewController
        vc.image = self.imageArray[indexPath.row]!
        vc.title = self.appleProducts[indexPath.row]
    }
}

}

CollectionViewCell.swift

import UIKit

class CollectionViewCell: UICollectionViewCell
{
@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var titleLabel: UILabel!
}

NewViewController.swift

import UIKit

class NewViewController: UIViewController
{
@IBOutlet weak var imageView: UIImageView!
var image = UIImage()

override func viewDidLoad()
{
    super.viewDidLoad()

    self.imageView.image = self.image
}

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


/*
// 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.
}
*/

}

Answer 1

在点击后显示的视图控制器中，您应该进行水平滚动UICollectionView。在此集合视图上，将其pagingEnabled属性设置为true。

接下来要做的是重新格式化父视图控制器中的prepareForSegue方法，将整个图像数组传递给呈现的视图控制器以及选定的索引路径。

然后，在您呈现的视图控制器中，您应该将集合视图的数据源配置为显示所有图像，但请确保从父视图控制器传递的初始选定索引路径开始

UICollectionView滚动/滑动到下一个项目swift

1 个答案: