[英]How to pass an array of images for selected multiple images from gallery and display them on another widget in Flutter
[英]How to display multiple images selected from gallery in collection view?
在這里,我使用了第三方庫BSImagePicker在我們的庫中進行了多次選擇。選擇圖像后,我將無法保存並在圖像視圖中顯示。我希望將圖像保存並在集合視圖中顯示。我已導入照片和BSImagePicker。
如果我單擊showImagepicker,則可以選擇多個圖像,並且應該將其放置在各自的位置。我使用4圖像視圖來設置我們選擇的圖像。 這是我的代碼:
class ViewController: UIViewController ,UICollectionViewDataSource,UICollectionViewDelegate{
@IBAction func showImagePicker(_ sender: UIButton) {
let vc = BSImagePickerViewController()
vc.maxNumberOfSelections = 4
bs_presentImagePickerController(vc, animated: true,
select: { (asset: PHAsset) -> Void in
print("Selected: \(asset)")
}, deselect: { (asset: PHAsset) -> Void in
print("Deselected: \(asset)")
}, cancel: { (assets: [PHAsset]) -> Void in
print("Cancel: \(assets)")
}, finish: { (assets: [PHAsset]) -> Void in
print("Finish: \(assets)")
if let imageView = vc.imageview{
PHCachingImageManager.default().requestImage(for: asset, targetSize:imageView.frame.size, contentMode: .aspectFit, options: options) { (result, _) in
imageView.image = result
}
}
}, completion: nil)
}
@IBOutlet weak var collectionview: UICollectionView!
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 4
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionview.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CollectionViewCell
cell.imagecollection.image = imageview[indexPath.row]
return cell
}
這是collectionviewcell的自定義視圖類:
class CollectionViewCell: UICollectionViewCell {
@IBOutlet weak var imagecollection: UIImageView!
@IBOutlet weak var imageview2: UIImageView!
@IBOutlet weak var imageview3: UIImageView!
@IBOutlet weak var imageview4: UIImageView!
}
我已經使用了4個圖像視圖的出口。我需要保存在此圖像視圖中。
我為此找到了解決方案。
在全球范圍內聲明
var Select = PHAsset
var arrimg = UIImage
@IBAction func showImagePicker(_發件人:UIButton){
let imgPkr = BSImagePickerViewController()
self.bs_presentImagePickerController(imgPkr, animated: true, select: {(asset : PHAsset) -> Void in }, deselect: {(asset : PHAsset) -> Void in}, cancel: {(assets : [PHAsset]) -> Void in}, finish: {(assets : [PHAsset]) -> Void in
for i in 0..<assets.count
{
self.Select.append(assets[i])
}
}, completion: nil)}
@objc func getAllImg() -> Void
{
if Select.count != 0{
for i in 0..<Select.count{
let manager = PHImageManager.default()
let option = PHImageRequestOptions()
var thumbnail = UIImage()
option.isSynchronous = true
manager.requestImage(for: Select[i], targetSize: CGSize(width: 300, height: 300), contentMode: .aspectFill, options: option, resultHandler: {(result, info)->Void in
thumbnail = result!
})
self.arrimg.append(thumbnail)
}
}
collectionview.reloadData()
}
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