我正在尝试创建一个与iOS附带的照片应用程序具有类似功能的应用程序,我的功能允许您点按一个单元格,该单元格可以扩展图像以适应屏幕,然后点按图像以关闭它。我现在想要添加选择按钮,以便您可以选择可以下载的多个图像。我对此很陌生并环顾四周但却找不到能够完成这两件事的例子。任何帮助都会很棒。
更新
我目前的代码:
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return imagesURLArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "photoCell", for: indexPath) as! PhotoCell
cell.backgroundColor = .clear
cell.imageView.image = UIImage(contentsOfFile: imagesURLArray[indexPath.row].path)
cell.checkmarkView.isHidden = true
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout,sizeForItemAt indexPath: IndexPath) -> CGSize {
let paddingSpace = sectionInsets.left * (itemsPerRow + 1)
let availableWidth = view.frame.width - paddingSpace
let widthPerItem = availableWidth / itemsPerRow
return CGSize(width: widthPerItem, height: widthPerItem)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout,insetForSectionAt section: Int) -> UIEdgeInsets {
return sectionInsets
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return sectionInsets.left
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
addZoomedImage(indexPath.row)
addGestureToImage()
addBackGroundView()
view.addSubview(selectedImage)
}
我不知道从哪里开始,是否更容易添加长按手势来选择要下载的多个图像,或者在照片应用程序中选择按钮,这两个对于从哪里开始都有点无能为力。
答案 0 :(得分:1)
好的 - 一种方法:
PhotoCell
- 可能是左上角或右上角didSelectItemAt indexPath:
这是一般的想法。对您而言,下一个好的地方可能是查看通过搜索uicollectionviewcell check mark
答案 1 :(得分:0)
//在swift中工作3.3希望有所帮助
//my model struct
struct Brands {
var brandId: Int = 0
var productId: Int = 0
var name: String = ""
var isChecked:Bool = false
}
var arrBrands = []//initialise arr of model
func collectionView(_ collectionView: UICollectionView,
numberOfItemsInSection section: Int) -> Int {
return arrBrands.count
}
func collectionView(_ collectionView: UICollectionView,cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let identifier: String = "brandCell"
let cell: YourCustomCell? =
collectionView.dequeueReusableCell(withReuseIdentifier: identifier,
for: indexPath) as? YourCustomCell;
let isChecked = arrBrands[indexPath.row].isChecked
cell?.brandName.font = (isChecked) ?fontForTimesRoman(withStyle:"bold", andFontsize: 14):fontForTimesRoman(withStyle: "regular",
andFontsize: 14)
cell?.brandName.text = arrBrands[indexPath.row].name
cell?.brandCheckButt.setImage((isChecked) ?UIImage(named:"filled_checkmark.png"):UIImage(named:"empty_checkmark.png"), for: .normal)
return cell!
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
checkUncheckBrand(index: indexPath.row)
}
func collectionView(_ collectionView: UICollectionView,
didDeselectItemAt indexPath: IndexPath) {
checkUncheckBrand(index: indexPath.row)
}
func checkUncheckBrand(index:Int){
arrBrands[index].isChecked = ! (arrBrands.isChecked)
brandFilterCV.reloadData()
}