大家, 我是Swift的初学者,目前没有任何进展。 我已经用CollectionView构建了一个视图,并想用照片库中的图片填充它。
不幸的是,我无法将UIImage创建为数组并将其显示在CollectionView中。
我可以创建一个UIImageView并相应地将其连接到我的vc,还将图像加载到视图中。
但是我不知道如何将几个图像加载到CollectionView中。
如何建立自己的图库,从相机或照片库中加载图片?
那是我以前的代码
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
@IBOutlet weak var myCollectionView: UICollectionView!
let dataArray = ["1", "2", "3", "4", "5"]
override func viewDidLoad() {
super.viewDidLoad()
// Set Delegates
self.myCollectionView.delegate = self
self.myCollectionView.dataSource = self
}
@IBAction func chooseImage(_ sender: UIBarButtonItem) {
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
let actionSheet = UIAlertController(title: "Quelle", message: "Wähle eine Quelle aus", preferredStyle: .actionSheet)
actionSheet.addAction(UIAlertAction(title: "Kamera", style: .default, handler: { (action:UIAlertAction) in
if UIImagePickerController.isSourceTypeAvailable(.camera){
imagePickerController.sourceType = .camera
self.present(imagePickerController, animated: true, completion: nil)
} else {
print("Kamera nicht verfügbar")
}
}))
actionSheet.addAction(UIAlertAction(title: "Foto", style: .default, handler: { (action:UIAlertAction) in
imagePickerController.sourceType = .photoLibrary
self.present(imagePickerController, animated: true, completion: nil)
}))
actionSheet.addAction(UIAlertAction(title: "Abbrechen", style: .cancel, handler: nil))
self.present(actionSheet, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
picker.dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: nil)
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return dataArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ItemCell", for: indexPath) as! ItemCell
cell.setData(text: self.dataArray[indexPath.row])
return cell
}
该单元的实现如下。
class ItemCell: UICollectionViewCell {
@IBOutlet weak var textLabel: UILabel!
@IBOutlet weak var imageView: UIImageView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
func setData(text: String) {
self.textLabel.text = text
}
func setImg(image: UIImage) {
self.imageView.image = image
}
但是现在我想获取UIImages而不是标签“ 1”,“ 2”等等,并且只有那些我使用imagePickerController选择的对象。
答案 0 :(得分:0)
如果我理解这个问题,那么您就快到了。如果您对问题更明确一点会更好,因为我可能会浪费时间回答问题。
我想你想要的是:
您的UICollectionViewCell实现看起来不错,所以我认为它可以工作。
尝试这些步骤。
将dataArray的声明更改为
var dataArray: [UIImage] = []
将ImagePicker委托函数更改为:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
dataArray.append(image)
picker.dismiss(animated: true, completion: nil)
self.myCollectionView.insertItems(at: [IndexPath(item: dataArray.count, section: 0)])
}
将cell.setData更改为cell.setImg
您可能需要以某种方式使图像持久化,以使其变得有用。