func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
print("gallery count : \(self.arrayGallerySingle.count)")
return self.arrayGallerySingle.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "gallerycell", for: indexPath) as! GalleryViewCell
return cell
}
//API Fetching method
func galleryFetch(){
let prs = [
"id": dealIDGallery,
"deal_single_page": "1" as String
]
Service.StartWithoutLoading(prs as [String : AnyObject]?, onCompletion: { result in
let jsonResponseSingle = result as? NSDictionary
print(" jsonResponse\(String(describing: jsonResponseSingle))")
if let resultGallery = jsonResponseSingle?.value(forKey: "result") as? NSArray{
for keyValuesGallery in resultGallery {
let gallerySingle = (keyValuesGallery as AnyObject).value(forKey: "gallery_images") as? NSArray
print("Gallery Images Key: \(gallerySingle)")
self.arrayGallerySingle = gallerySingle as! [AnyObject]
DispatchQueue.main.async { () -> Void in
self.collectionView?.reloadData()
}
}
}
})
}
如何在UICollectionViewCell上显示带有键gallery_images
的图像数组?此行print("Gallery Images Key: \(gallerySingle)")
在控制台上打印所需的图像数组,但我无法在collectionView
上显示。我的JSON
回复是http://www.jsoneditoronline.org/?id=8eccb63976d76be7d0b2d1b0e8f02306。我也在我的项目中使用SDWebImage
。我已经检查过datasource
连接& collectionView
IBoutlet以及单元格内的图像。我是Swift的帮助初学者,如果需要,还有任何进一步的信息请问
答案 0 :(得分:1)
Swift 3.0
这是我的更新答案希望它也能帮助某人
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
print("gallery count : \(self.arrayGallerySingle.count)")
return self.arrayGallerySingle.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "gallerycell", for: indexPath) as! GalleryViewCell
if let imgUrl = arrayGallerySingle[indexPath.row] as? String {
if let url = NSURL(string: imgUrl) {
cell.galleryImage?.sd_setImage(with: url as URL, placeholderImage: UIImage(named: "place holder image"), options: .lowPriority)
}
else{
let alertController = UIAlertController(title: "No Gallery Images", message: "test", preferredStyle: .alert)
let okButton = UIAlertAction(title: "Okay", style: .default, handler: nil)
alertController.addAction(okButton)
alertController.present(alertController, animated: true, completion: nil)
}
}
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 0.0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 0.0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
{
return CGSize(width: collectionView.frame.size.width/2, height: collectionView.frame.size.height/3)
}
func galleryFetch(){
let prs = [
"id": dealIDGallery,
"deal_single_page": "1" as String
]
Service.StartWithoutLoading(prs as [String : AnyObject]?, onCompletion: { result in
let jsonResponseSingle = result as? NSDictionary
print(" jsonResponse\(String(describing: jsonResponseSingle))")
if let resultGallery = jsonResponseSingle?.value(forKey: "result") as? NSArray{
for keyValuesGallery in resultGallery {
let gallerySingle = (keyValuesGallery as AnyObject).value(forKey: "gallery_images") as? NSArray
print("Gallery Images Key: \(gallerySingle)")
self.arrayGallerySingle = gallerySingle as! [AnyObject]
if self.arrayGallerySingle.count > 0 {
DispatchQueue.main.async { () -> Void in
self.collectionView?.reloadData()
}
} else {
let alertController = UIAlertController(title: "Message", message: "No images found.", preferredStyle: .alert)
alertController.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: self.doSomething))
self.present(alertController, animated: true, completion: nil)
}
}
}
})
}
答案 1 :(得分:0)
Swift 3.0
您可以使用SDWebcache以这种方式实现在collectionView单元格图像中加载图像。
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "gallerycell", for: indexPath) as! GalleryViewCell
if let imgUrl = arrayGallerySingle[indexPath.row] as? String {
if let url = URL(string: imgUrl) {
//Replace with your imageView outlet
cell.imageView.sd_setImageWithURL(url, placeholderImage: UIImage(named: "place holder image"), options: .lowPriority)
}
}
return cell
}
如果要在collectionView中显示6个单元格,则必须将UICollectionViewLayout
方法设置为定义的单元格大小,如下所示。
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
{
return CGSize(width: collectionView.frame.size.width/2, height: collectionView.frame.size.height/3)
}
当数组计数不为空时,您可以显示警报,以及为什么在for循环中重新加载Collection视图,如下所示实现它。
Service.StartWithoutLoading(prs as [String : AnyObject]?, onCompletion: { result in
let jsonResponseSingle = result as? NSDictionary
print(" jsonResponse\(String(describing: jsonResponseSingle))")
if let resultGallery = jsonResponseSingle?.value(forKey: "result") as? NSArray{
for keyValuesGallery in resultGallery {
let gallerySingle = (keyValuesGallery as AnyObject).value(forKey: "gallery_images") as? NSArray
print("Gallery Images Key: \(gallerySingle)")
self.arrayGallerySingle = gallerySingle as! [AnyObject]
}
if self.arrayGallerySingle.count > 0 {
DispatchQueue.main.async { () -> Void in
self.collectionView?.reloadData()
}
} else {
let alertController = UIAlertController(title: "Your Title", message: "their is no images", preferredStyle: .alert)
alertController.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
self.present(alertController, animated: tru, completion: nil)
}
}
})