如何在单元格末尾添加 CollectionView 自定义单元格？
How to add CollectionView custom cell at the end of cell?
我有一组图像，显示在集合视图中，当我单击打开图像选择器的最后一个单元格时，我创建了一个单元格。
-> 可以在该单元格中设置所选图像，并自动添加最后一个新单元格。
（我对此一无所知，请帮忙，谢谢）
集合视图class
class ViewController: UIViewController,UICollectionViewDelegate,UICollectionViewDataSource,UIImagePickerControllerDelegate,UINavigationControllerDelegate
{
var imagePicker = UIImagePickerController()
let reuseIdentifier = "cell" // also enter this string as the cell identifier in the storyboard
var items = ["1", "2", "3", "4", "5"]
@IBOutlet var collectionView: UICollectionView!
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.
}
// MARK: - UICollectionViewDataSource protocol
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.items.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
// cell.backgroundColor = UIColor.cyanColor()
cell.btnSelectImage.setTitle(items[indexPath.row], forState: .Normal)
cell.btnSelectImage.tag = indexPath.row
cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
return cell
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
if indexPath.row == 0
{
// call your alert here
}
}
func buttonClicked(sender:UIButton)
{
let alertController: UIAlertController = UIAlertController(title: "Please choose a Picture".localized, message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
let cameraAction = UIAlertAction(title: "Camera".localized, style: UIAlertActionStyle.Default){
UIAlertAction in
self.openCamera()
}
let gallaryAction = UIAlertAction(title: "Gallery".localized, style: UIAlertActionStyle.Default){
UIAlertAction in
self.openGallary()
}
let cancelAction = UIAlertAction(title: "Cancel".localized, style: UIAlertActionStyle.Cancel){
UIAlertAction in
}
alertController.addAction(cameraAction)
alertController.addAction(gallaryAction)
alertController.addAction(cancelAction)
if UIDevice.currentDevice().userInterfaceIdiom == .Phone{
self.presentViewController(alertController, animated: true, completion: nil)
}
}
//MARK: - UIImagepickercontroller Method -
func openCamera()
{
if UIImagePickerController.availableCaptureModesForCameraDevice(.Rear) != nil
{
imagePicker.allowsEditing = true
imagePicker.sourceType = UIImagePickerControllerSourceType.Camera
imagePicker.showsCameraControls = true
imagePicker.cameraCaptureMode = .Photo
imagePicker.takePicture()
if UIDevice.currentDevice().userInterfaceIdiom == .Phone
{
self.presentViewController(imagePicker, animated: true, completion: nil)
}
}
else
{
noCamera()
}
}
func openGallary()
{
if UIDevice.currentDevice().userInterfaceIdiom == .Phone
{
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self.presentViewController(imagePicker, animated: true, completion: nil)
imagePicker.allowsEditing = true
}
else
{
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
}
}
func noCamera()
{
let alertVC = UIAlertController(title: "ok", message: "Device has no camera".localized, preferredStyle: UIAlertControllerStyle.Alert)
let okAction = UIAlertAction(title: "OK".localized, style: UIAlertActionStyle.Default, handler: nil)
alertVC.addAction(okAction)
presentViewController(alertVC, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
let timestamp = Int(NSDate().timeIntervalSince1970)
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
var indexPath = NSIndexPath(forRow: 0, inSection: 0)
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCollectionViewCell
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
collectionView.reloadData()
dismissViewControllerAnimated(true, completion: nil)
}
func imagePickerControllerDidCancel(picker: UIImagePickerController)
{
dismissViewControllerAnimated(true, completion: nil)
}
}
CollcetionViewCell
class MyCollectionViewCell: UICollectionViewCell
{
@IBOutlet var btnSelectImage: UIButton!
}
-创建图像数组，显示在collectionview
基本上你必须创建一个 item 类型的对象，因为它是你的 collectionview 的数据源，最后将它添加到 item 数组中，然后重新加载 collectionview。
可能您需要在 func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) 方法中执行此操作。
编辑：
var items = [UIImage]()
//可能有一些图片对象
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
// cell.backgroundColor = UIColor.cyanColor()
// cell.btnSelectImage.setTitle(items[indexPath.row], forState: .Normal)
// cell.btnSelectImage.tag = indexPath.row
// cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
let choosenImage = items[indexPath.row]
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
return cell
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
/* let timestamp = Int(NSDate().timeIntervalSince1970)
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
var indexPath = NSIndexPath(forRow: 0, inSection: 0)
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCollectionViewCell
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
*/
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
self.items.append(choosenImage)
collectionView.reloadData()
dismissViewControllerAnimated(true, completion: nil)
}
// MARK:-
var images:[Images]=[]
//MARK:- UICollectionViewDataSource protocol
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.images.count+1
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
if indexPath.row == images.count{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("newCell", forIndexPath: indexPath) as! MyNewCollectionViewCell
return cell
}
else{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
// cell.backgroundColor = UIColor.cyanColor()
cell.btnSelectImage.setTitle(images[indexPath.row].image, forState: .Normal)
cell.btnSelectImage.tag = indexPath.row
cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
return cell
}
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
if indexPath.row == images.count
{
// call the uipicker opening method here.
}}
从 UIImagePickerView 委托接收的图像模型
class Images{
var image:UIImage?
}
我的方法是让 var 说 itemsCount 初始化为 1 而不是你的 var 项目是一个数组。还有一个图像数组。
var itemsCount = 1
var images = [UIImage]()
// MARK: - UICollectionViewDataSource protocol
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.itemsCount
}
Returncollection视图.
数据源方法中的itemsCount
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
if indexPath.row == self.itemsCount - 1
{
// call your alert here
}
}
检查选择的 indexPath 是否是最后一个单元格，因为根据您的要求，您需要在单击最后一个单元格时显示 imagePicker。
现在再添加一个单元格，当图像被成功选取时
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
let timestamp = Int(NSDate().timeIntervalSince1970)
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
//Change 1
var indexPath = NSIndexPath(forRow: self.itemsCount -1, inSection: 0)
self.images.append(choosenImage)
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCollectionViewCell
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
//Change 2
self.itemsCount += 1
collectionView.reloadData()
dismissViewControllerAnimated(true, completion: nil)
}
在代码中进行更改，标记为 更改 1 和 更改 2。
并进行图像缓存，因为在 cellForRowAtIndexPath 中您没有设置图像，新的 dequed 单元格可能有也可能没有图像。此外，图像可能会根据 dequed 单元格而有所不同。要设置标题，您可以使用
cell.btnSelectImage.setTitle(String(self.itemsCount), forState: .Normal)
if images.indices.contains(indexPath.row) {
cell.btnSelectImage.setBackgroundImage(self.images[indexPath.row], forState: .Normal)
}
最终，插入一个新单元格而不是重新加载整个 collection 视图的成本会更低。
你的单元格没有按顺序填充图像，所以我建议使用字典数据结构而不是数组。在更改时将图像更新到项目字典以获得索引路径，然后重新加载数据。
var items:[Int:Any] = [1: NSNull() , 2: NSNull(), 3: NSNull(), 4: NSNull(), 5: NSNull()]
在委托调用中：
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
// cell.backgroundColor = UIColor.cyanColor()
cell.btnSelectImage.setTitle(items[indexPath.row], forState: .Normal)
cell.btnSelectImage.tag = indexPath.row
if let choosenImage = items[indexPath.row+1] as? UIImage {
print(choosenImage)
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
} else {
cell.btnSelectImage.setBackgroundImage(nil, forState: .Normal)
print("no image exist")
}
cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
return cell
}
更新图像选择器回调的字典。
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
items.updateValue(choosenImage, forKey: yourIndexPath)
请仅编辑方法并添加一些方法：
var imagePicker = UIImagePickerController()
var selectedImage : UIImage?
override func viewDidLoad() {
super.viewDidLoad()
imagePicker.delegate = self
// Do any additional setup after loading the view, typically from a nib.
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
cell.btnSelectImage.setTitle(items[indexPath.row], forState: .Normal)
cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
cell.btnSelectImage.setBackgroundImage(selectedImage, forState: .Normal)//setBackground image of button
return cell
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
//because need open imagePicker only last cell
//IF YOU WANT TO OPEN IMAGEPICKER CLICK ON BUTTON THEN ADD COMMENT BELOW LINE
if indexPath.row == self.items.count-1
{
self.configuringImagePickerController()
}
}
func buttonClicked(sender:UIButton)
{
self.configuringImagePickerController()//If you want open imagepicker click on button
}
func configuringImagePickerController()
{
let alertController: UIAlertController = UIAlertController(title: "Please choose a Picture".localized, message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
let cameraAction = UIAlertAction(title: "Camera".localized, style: UIAlertActionStyle.Default){
UIAlertAction in
self.openCamera()
}
let gallaryAction = UIAlertAction(title: "Gallery".localized, style: UIAlertActionStyle.Default){
UIAlertAction in
self.openGallary()
}
let cancelAction = UIAlertAction(title: "Cancel".localized, style: UIAlertActionStyle.Cancel){
UIAlertAction in
}
alertController.addAction(cameraAction)
alertController.addAction(gallaryAction)
alertController.addAction(cancelAction)
self.presentViewController(alertController, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
selectedImage = info[UIImagePickerControllerEditedImage] as! UIImage
collectionView.reloadData()
dismissViewControllerAnimated(true, completion: nil)
}
我有一组图像，显示在集合视图中，当我单击打开图像选择器的最后一个单元格时，我创建了一个单元格。 -> 可以在该单元格中设置所选图像，并自动添加最后一个新单元格。 （我对此一无所知，请帮忙，谢谢）
集合视图class
class ViewController: UIViewController,UICollectionViewDelegate,UICollectionViewDataSource,UIImagePickerControllerDelegate,UINavigationControllerDelegate
{
var imagePicker = UIImagePickerController()
let reuseIdentifier = "cell" // also enter this string as the cell identifier in the storyboard
var items = ["1", "2", "3", "4", "5"]
@IBOutlet var collectionView: UICollectionView!
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.
}
// MARK: - UICollectionViewDataSource protocol
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.items.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
// cell.backgroundColor = UIColor.cyanColor()
cell.btnSelectImage.setTitle(items[indexPath.row], forState: .Normal)
cell.btnSelectImage.tag = indexPath.row
cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
return cell
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
if indexPath.row == 0
{
// call your alert here
}
}
func buttonClicked(sender:UIButton)
{
let alertController: UIAlertController = UIAlertController(title: "Please choose a Picture".localized, message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
let cameraAction = UIAlertAction(title: "Camera".localized, style: UIAlertActionStyle.Default){
UIAlertAction in
self.openCamera()
}
let gallaryAction = UIAlertAction(title: "Gallery".localized, style: UIAlertActionStyle.Default){
UIAlertAction in
self.openGallary()
}
let cancelAction = UIAlertAction(title: "Cancel".localized, style: UIAlertActionStyle.Cancel){
UIAlertAction in
}
alertController.addAction(cameraAction)
alertController.addAction(gallaryAction)
alertController.addAction(cancelAction)
if UIDevice.currentDevice().userInterfaceIdiom == .Phone{
self.presentViewController(alertController, animated: true, completion: nil)
}
}
//MARK: - UIImagepickercontroller Method -
func openCamera()
{
if UIImagePickerController.availableCaptureModesForCameraDevice(.Rear) != nil
{
imagePicker.allowsEditing = true
imagePicker.sourceType = UIImagePickerControllerSourceType.Camera
imagePicker.showsCameraControls = true
imagePicker.cameraCaptureMode = .Photo
imagePicker.takePicture()
if UIDevice.currentDevice().userInterfaceIdiom == .Phone
{
self.presentViewController(imagePicker, animated: true, completion: nil)
}
}
else
{
noCamera()
}
}
func openGallary()
{
if UIDevice.currentDevice().userInterfaceIdiom == .Phone
{
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self.presentViewController(imagePicker, animated: true, completion: nil)
imagePicker.allowsEditing = true
}
else
{
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
}
}
func noCamera()
{
let alertVC = UIAlertController(title: "ok", message: "Device has no camera".localized, preferredStyle: UIAlertControllerStyle.Alert)
let okAction = UIAlertAction(title: "OK".localized, style: UIAlertActionStyle.Default, handler: nil)
alertVC.addAction(okAction)
presentViewController(alertVC, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
let timestamp = Int(NSDate().timeIntervalSince1970)
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
var indexPath = NSIndexPath(forRow: 0, inSection: 0)
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCollectionViewCell
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
collectionView.reloadData()
dismissViewControllerAnimated(true, completion: nil)
}
func imagePickerControllerDidCancel(picker: UIImagePickerController)
{
dismissViewControllerAnimated(true, completion: nil)
}
}
CollcetionViewCell
class MyCollectionViewCell: UICollectionViewCell
{
@IBOutlet var btnSelectImage: UIButton!
}
-创建图像数组，显示在collectionview
基本上你必须创建一个 item 类型的对象，因为它是你的 collectionview 的数据源，最后将它添加到 item 数组中，然后重新加载 collectionview。
可能您需要在 func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) 方法中执行此操作。
编辑：
var items = [UIImage]()
//可能有一些图片对象
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
// cell.backgroundColor = UIColor.cyanColor()
// cell.btnSelectImage.setTitle(items[indexPath.row], forState: .Normal)
// cell.btnSelectImage.tag = indexPath.row
// cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
let choosenImage = items[indexPath.row]
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
return cell
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
/* let timestamp = Int(NSDate().timeIntervalSince1970)
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
var indexPath = NSIndexPath(forRow: 0, inSection: 0)
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCollectionViewCell
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
*/
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
self.items.append(choosenImage)
collectionView.reloadData()
dismissViewControllerAnimated(true, completion: nil)
}
// MARK:-
var images:[Images]=[]
//MARK:- UICollectionViewDataSource protocol
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.images.count+1
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
if indexPath.row == images.count{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("newCell", forIndexPath: indexPath) as! MyNewCollectionViewCell
return cell
}
else{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
// cell.backgroundColor = UIColor.cyanColor()
cell.btnSelectImage.setTitle(images[indexPath.row].image, forState: .Normal)
cell.btnSelectImage.tag = indexPath.row
cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
return cell
}
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
if indexPath.row == images.count
{
// call the uipicker opening method here.
}}
从 UIImagePickerView 委托接收的图像模型
class Images{
var image:UIImage?
}
我的方法是让 var 说 itemsCount 初始化为 1 而不是你的 var 项目是一个数组。还有一个图像数组。
var itemsCount = 1
var images = [UIImage]()
// MARK: - UICollectionViewDataSource protocol
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.itemsCount
}
Returncollection视图.
数据源方法中的itemsCountfunc collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
if indexPath.row == self.itemsCount - 1
{
// call your alert here
}
}
检查选择的 indexPath 是否是最后一个单元格，因为根据您的要求，您需要在单击最后一个单元格时显示 imagePicker。
现在再添加一个单元格，当图像被成功选取时
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
let timestamp = Int(NSDate().timeIntervalSince1970)
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
//Change 1
var indexPath = NSIndexPath(forRow: self.itemsCount -1, inSection: 0)
self.images.append(choosenImage)
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCollectionViewCell
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
//Change 2
self.itemsCount += 1
collectionView.reloadData()
dismissViewControllerAnimated(true, completion: nil)
}
在代码中进行更改，标记为 更改 1 和 更改 2。 并进行图像缓存，因为在 cellForRowAtIndexPath 中您没有设置图像，新的 dequed 单元格可能有也可能没有图像。此外，图像可能会根据 dequed 单元格而有所不同。要设置标题，您可以使用
cell.btnSelectImage.setTitle(String(self.itemsCount), forState: .Normal)
if images.indices.contains(indexPath.row) {
cell.btnSelectImage.setBackgroundImage(self.images[indexPath.row], forState: .Normal)
}
最终，插入一个新单元格而不是重新加载整个 collection 视图的成本会更低。
你的单元格没有按顺序填充图像，所以我建议使用字典数据结构而不是数组。在更改时将图像更新到项目字典以获得索引路径，然后重新加载数据。
var items:[Int:Any] = [1: NSNull() , 2: NSNull(), 3: NSNull(), 4: NSNull(), 5: NSNull()]
在委托调用中：
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
// cell.backgroundColor = UIColor.cyanColor()
cell.btnSelectImage.setTitle(items[indexPath.row], forState: .Normal)
cell.btnSelectImage.tag = indexPath.row
if let choosenImage = items[indexPath.row+1] as? UIImage {
print(choosenImage)
cell.btnSelectImage.setBackgroundImage(choosenImage, forState: .Normal)
} else {
cell.btnSelectImage.setBackgroundImage(nil, forState: .Normal)
print("no image exist")
}
cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
return cell
}
更新图像选择器回调的字典。
let choosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
items.updateValue(choosenImage, forKey: yourIndexPath)
请仅编辑方法并添加一些方法：
var imagePicker = UIImagePickerController()
var selectedImage : UIImage?
override func viewDidLoad() {
super.viewDidLoad()
imagePicker.delegate = self
// Do any additional setup after loading the view, typically from a nib.
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! MyCollectionViewCell
cell.btnSelectImage.setTitle(items[indexPath.row], forState: .Normal)
cell.btnSelectImage.addTarget(self,action:#selector(buttonClicked),
forControlEvents:.TouchUpInside)
cell.btnSelectImage.setBackgroundImage(selectedImage, forState: .Normal)//setBackground image of button
return cell
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
//because need open imagePicker only last cell
//IF YOU WANT TO OPEN IMAGEPICKER CLICK ON BUTTON THEN ADD COMMENT BELOW LINE
if indexPath.row == self.items.count-1
{
self.configuringImagePickerController()
}
}
func buttonClicked(sender:UIButton)
{
self.configuringImagePickerController()//If you want open imagepicker click on button
}
func configuringImagePickerController()
{
let alertController: UIAlertController = UIAlertController(title: "Please choose a Picture".localized, message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
let cameraAction = UIAlertAction(title: "Camera".localized, style: UIAlertActionStyle.Default){
UIAlertAction in
self.openCamera()
}
let gallaryAction = UIAlertAction(title: "Gallery".localized, style: UIAlertActionStyle.Default){
UIAlertAction in
self.openGallary()
}
let cancelAction = UIAlertAction(title: "Cancel".localized, style: UIAlertActionStyle.Cancel){
UIAlertAction in
}
alertController.addAction(cameraAction)
alertController.addAction(gallaryAction)
alertController.addAction(cancelAction)
self.presentViewController(alertController, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
selectedImage = info[UIImagePickerControllerEditedImage] as! UIImage
collectionView.reloadData()
dismissViewControllerAnimated(true, completion: nil)
}