由于未捕获的异常 'NSInvalidArgumentException' 而终止应用程序，原因：'UICollectionView must be initialized with a non-nil layout parameter'
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'UICollectionView must be initialized with a non-nil layout parameter'
我试图在 CollectionViewController 中显示一个 imagePicker 然后我遇到了如下错误。
Error:-
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'UICollectionView must be initialized with a non-nil layout parameter'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff20421af6 __exceptionPreprocess + 242
1 libobjc.A.dylib 0x00007fff20177e78 objc_exception_throw + 48
2 CoreFoundation 0x00007fff204219d4 -[NSException initWithCoder:] + 0
3 UIKitCore 0x00007fff23d6caf5 -[UICollectionView initWithFrame:collectionViewLayout:] + 205
4 UIKitCore 0x00007fff23e72b06 -[UICollectionViewController _newCollectionViewWithFrame:collectionViewLayout:] + 75
5 UIKitCore 0x00007fff23e71e7d -[UICollectionViewController loadView] + 1461
6 UIKitCore 0x00007fff23f62947 -[UIViewController loadViewIfRequired] + 172
7 UIKitCore 0x00007fff23f630c1 -[UIViewController view] + 27
8 UIKitCore 0x00007fff23e421fe -[UIPresentationController __sizeClassPair] + 62
9 UIKitCore 0x00007fff23f75e46 -[UIViewController _presentViewController:withAnimationController:completion:] + 2429
10 CoreFoundation 0x00007fff204282fc __invoking___ + 140
11 CoreFoundation 0x00007fff204257b6 -[NSInvocation invoke] + 303
12 UIKitCore 0x00007fff23f70333 -[UIViewController _endDelayingPresentation] + 277
13 UIKitCore 0x00007fff23e799a2 -[UIImagePickerController _handleEndingPhotoPickerPresentationDelay] + 53
14 libdispatch.dylib 0x00000001037f37ec _dispatch_call_block_and_release + 12
15 libdispatch.dylib 0x00000001037f49c8 _dispatch_client_callout + 8
16 libdispatch.dylib 0x0000000103802e75 _dispatch_main_queue_callback_4CF + 1152
17 CoreFoundation 0x00007fff2038fdbb __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
18 CoreFoundation 0x00007fff2038a63e __CFRunLoopRun + 2685
19 CoreFoundation 0x00007fff203896d6 CFRunLoopRunSpecific + 567
20 GraphicsServices 0x00007fff2c257db3 GSEventRunModal + 139
21 UIKitCore 0x00007fff24696cf7 -[UIApplication _run] + 912
22 UIKitCore 0x00007fff2469bba8 UIApplicationMain + 101
23 Demo_App 0x000000010139600b main + 75
24 libdyld.dylib 0x00007fff2025a3e9 start + 1
25 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
这是我的 AppDelegate.swift
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
window = UIWindow()
window?.makeKeyAndVisible()
//get rid of shadow
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .default)
let layout = type(of: UICollectionViewFlowLayout()).init()
window?.rootViewController = UINavigationController(rootViewController: DemoApplicationController(collectionViewLayout: layout))
FirebaseApp.configure()
return true
}
}
这里是 CollectionViewControllerDemoApplicationController.Swift
class DemoApplicationController: UICollectionViewController, UICollectionViewDelegateFlowLayout{
override func viewDidLoad() {
super.viewDidLoad()
//title Label
navigationController?.navigationBar.isTranslucent = false
let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: view.frame.width - 250, height: view.frame.height))
titleLabel.text = "Demo Application"
titleLabel.font = UIFont(name: "HelveticaNeue-Bold", size: 20)
navigationItem.titleView = titleLabel
titleLabel.textColor = UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00)
setupCollectionView()
}
lazy var enroll: EnrollCell = {
let en = EnrollCell()
en.demoController = self
return en
}()
func setupCollectionView() {
if let flowLayout = collectionView?.collectionViewLayout as? UICollectionViewFlowLayout {
flowLayout.scrollDirection = .horizontal
flowLayout.minimumLineSpacing = 0
}
collectionView?.backgroundColor = .white
collectionView.register(FeedCell.self, forCellWithReuseIdentifier: UsersCell.identifer)
collectionView?.register(EnrollCell.self, forCellWithReuseIdentifier: EnrollCell.identifier)
collectionView?.contentInset = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView?.scrollIndicatorInsets = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView.isPagingEnabled = true
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 2
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: UsersCell.identifer, for: indexPath)
if indexPath.item == 1 {
return collectionView.dequeueReusableCell(withReuseIdentifier: EnrollCell.identifier, for: indexPath)
}
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: view.frame.width, height: view.frame.height - 60)
}
}
extension DemoApplicationController : UIImagePickerControllerDelegate,UINavigationControllerDelegate{
@objc func pickTheImage() {
print(123)
let vc = UIImagePickerController()
vc.sourceType = .photoLibrary
vc.delegate = self
vc.allowsEditing = true
present(vc, animated: true, completion: nil)
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let image = info[UIImagePickerController.InfoKey(rawValue: "UIImagePickerControllerEditedImage")] as? UIImage {
print("imagepicked")
enroll.profileIG.image=image
}
dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: true, completion: nil)
}
}
}
第一个 CollectionViewCell 名为 FeedCell.swift
class FeedCell: BaseCell,UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout {
let db = Firestore.firestore()
var documentdata = ""
lazy var collectionView : UICollectionView = {
let layout = UICollectionViewFlowLayout()
let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
cv.backgroundColor = .white
cv.dataSource = self
cv.delegate = self
return cv
}()
override func setupViews() {
super.setupViews()
addSubview(collectionView)
addConstraintsWithFormat("H:|[v0]|", views: collectionView)
addConstraintsWithFormat("V:|[v0]|", views: collectionView)
collectionView.register(UsersCell.self, forCellWithReuseIdentifier: UsersCell.identifer)
loadUserData()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return dataFile.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: UsersCell.identifer, for: indexPath) as! UsersCell
cell.titleLabel.text = dataFile[indexPath.item].FirstName
cell.titleLabel.text?.append(" \(dataFile[indexPath.item].LastName)")
cell.subtitleTextView.text = dataFile[indexPath.item].Gender
cell.subtitleTextView.text.append(" | \(dataFile[indexPath.item].Age()) |")
cell.subtitleTextView.text.append(" \(dataFile[indexPath.item].homeTowndata)")
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
frameWidth = Int(frame.width)
return CGSize(width: frame.width, height: frame.height/8)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 0
}
}
第二个 CollectionViewCell 名为 EnrollCell.swift
class EnrollCell: UsersCell,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout{
var demoController = DemoApplicationController()
static let identifier = "EnrollKey"
let profileIG : UIImageView = {
let imageView = UIImageView()
// imageView.image = UIImage(named: "1")
imageView.backgroundColor = UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00)
imageView.layer.cornerRadius=22
imageView.layer.masksToBounds=true
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
let setProfilePhoto: UIButton = {
let profile = UIButton()
profile.setTitle("Select Profile Photo", for: .normal)
profile.setTitleColor(UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00), for: .normal)
profile.titleLabel?.font = UIFont(name: "HelveticaNeue-Bold", size: 16)
profile.translatesAutoresizingMaskIntoConstraints = false
return profile
}()
lazy var collectionView : UICollectionView = {
let layout = UICollectionViewFlowLayout()
let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
cv.backgroundColor = .white
cv.delegate = self
return cv
}()
override func setupViews() {
addSubview(profileIG)
addSubview(setProfilePhoto)
UserDataButton.addTarget(self, action: #selector(editButtonTapped), for: UIControl.Event.touchUpInside)
setProfilePhoto.addTarget(demoController.self, action: #selector(DemoApplicationController.pickTheImage), for: UIControl.Event.touchUpInside)
}
}
在您的 EnrollCell 中创建一个名为 pickTheImageDelegate 的协议，并将其作为委托并执行 DemoApplicationController 的操作以执行选择器控制器。
此处 EnrollCell.Swift 更新代码
import UIKit
import Firebase
protocol pickTheImageDelegate {
func pickTheImage()
}
class EnrollCell: UsersCell,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout{
var delegate : pickTheImageDelegate?
static let identifier = "EnrollKey"
var demoController : DemoApplicationController?
let profileIG : UIImageView = {
let imageView = UIImageView()
imageView.image = UIImage(named: "1")
imageView.layer.cornerRadius=22
imageView.layer.masksToBounds=true
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
let setProfilePhoto: UIButton = {
let profile = UIButton()
profile.setTitle("Select Profile Photo", for: .normal)
profile.setTitleColor(UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00), for: .normal)
profile.titleLabel?.font = UIFont(name: "HelveticaNeue-Bold", size: 16)
profile.translatesAutoresizingMaskIntoConstraints = false
return profile
}()
lazy var collectionView : UICollectionView = {
let layout = UICollectionViewFlowLayout()
let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
cv.backgroundColor = .white
cv.delegate = self
return cv
}()
override func setupViews() {
addSubview(profileIG)
addSubview(setProfilePhoto)
setProfilePhoto.backgroundColor = .white
UserDataButton.addTarget(self, action: #selector(editButtonTapped), for: UIControl.Event.touchUpInside)
setProfilePhoto.addTarget(demoController, action: #selector(DemoApplicationController.pickTheImage), for: UIControl.Event.touchUpInside)
addConstraintsWithFormat("H:|-150-[v0(100)]-150-|", views: profileIG)
addConstraintsWithFormat("V:|-50-[v0(100)]-16-|", views: profileIG)
addConstraintsWithFormat("H:|-105-[v0(\(frame.width/2))]|", views: setProfilePhoto)
addConstraintsWithFormat("V:|-150-[v0(35)]|", views: setProfilePhoto)
}
}
这里的DemoApplicationContrller.Swift就是我们的UICollectionViewController
import UIKit
class DemoApplicationController: UICollectionViewController, UICollectionViewDelegateFlowLayout{
var enroll : EnrollCell?
override func viewDidLoad() {
super.viewDidLoad()
//title Label
navigationController?.navigationBar.isTranslucent = false
let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: view.frame.width - 250, height: view.frame.height))
titleLabel.text = "Demo Application"
titleLabel.font = UIFont(name: "HelveticaNeue-Bold", size: 20)
navigationItem.titleView = titleLabel
titleLabel.textColor = UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00)
enroll?.delegate=self
setupCollectionView()
}
func setupCollectionView() {
if let flowLayout = collectionView?.collectionViewLayout as? UICollectionViewFlowLayout {
flowLayout.scrollDirection = .horizontal
flowLayout.minimumLineSpacing = 0
}
collectionView?.backgroundColor = .white
collectionView.register(FeedCell.self, forCellWithReuseIdentifier: UsersCell.identifer)
collectionView?.register(EnrollCell.self, forCellWithReuseIdentifier: EnrollCell.identifier)
collectionView?.contentInset = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView?.scrollIndicatorInsets = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView.isPagingEnabled = true
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 2
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: UsersCell.identifer, for: indexPath)
if indexPath.item == 1 {
return collectionView.dequeueReusableCell(withReuseIdentifier: EnrollCell.identifier, for: indexPath)
}
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: view.frame.width, height: view.frame.height - 60)
}
}
extension DemoApplicationController : UIImagePickerControllerDelegate,UINavigationControllerDelegate,pickTheImageDelegate{
@objc func pickTheImage() {
let vc = UIImagePickerController()
vc.sourceType = .photoLibrary
vc.delegate = self
vc.allowsEditing = true
present(vc, animated: true, completion: nil)
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let image = info[UIImagePickerController.InfoKey(rawValue: "UIImagePickerControllerEditedImage")] as? UIImage {
enroll?.profileIG.image = image
}
dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: true, completion: nil)
}
}
}
我试图在 CollectionViewController 中显示一个 imagePicker 然后我遇到了如下错误。
Error:-
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'UICollectionView must be initialized with a non-nil layout parameter'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff20421af6 __exceptionPreprocess + 242
1 libobjc.A.dylib 0x00007fff20177e78 objc_exception_throw + 48
2 CoreFoundation 0x00007fff204219d4 -[NSException initWithCoder:] + 0
3 UIKitCore 0x00007fff23d6caf5 -[UICollectionView initWithFrame:collectionViewLayout:] + 205
4 UIKitCore 0x00007fff23e72b06 -[UICollectionViewController _newCollectionViewWithFrame:collectionViewLayout:] + 75
5 UIKitCore 0x00007fff23e71e7d -[UICollectionViewController loadView] + 1461
6 UIKitCore 0x00007fff23f62947 -[UIViewController loadViewIfRequired] + 172
7 UIKitCore 0x00007fff23f630c1 -[UIViewController view] + 27
8 UIKitCore 0x00007fff23e421fe -[UIPresentationController __sizeClassPair] + 62
9 UIKitCore 0x00007fff23f75e46 -[UIViewController _presentViewController:withAnimationController:completion:] + 2429
10 CoreFoundation 0x00007fff204282fc __invoking___ + 140
11 CoreFoundation 0x00007fff204257b6 -[NSInvocation invoke] + 303
12 UIKitCore 0x00007fff23f70333 -[UIViewController _endDelayingPresentation] + 277
13 UIKitCore 0x00007fff23e799a2 -[UIImagePickerController _handleEndingPhotoPickerPresentationDelay] + 53
14 libdispatch.dylib 0x00000001037f37ec _dispatch_call_block_and_release + 12
15 libdispatch.dylib 0x00000001037f49c8 _dispatch_client_callout + 8
16 libdispatch.dylib 0x0000000103802e75 _dispatch_main_queue_callback_4CF + 1152
17 CoreFoundation 0x00007fff2038fdbb __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
18 CoreFoundation 0x00007fff2038a63e __CFRunLoopRun + 2685
19 CoreFoundation 0x00007fff203896d6 CFRunLoopRunSpecific + 567
20 GraphicsServices 0x00007fff2c257db3 GSEventRunModal + 139
21 UIKitCore 0x00007fff24696cf7 -[UIApplication _run] + 912
22 UIKitCore 0x00007fff2469bba8 UIApplicationMain + 101
23 Demo_App 0x000000010139600b main + 75
24 libdyld.dylib 0x00007fff2025a3e9 start + 1
25 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
这是我的 AppDelegate.swift
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
window = UIWindow()
window?.makeKeyAndVisible()
//get rid of shadow
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .default)
let layout = type(of: UICollectionViewFlowLayout()).init()
window?.rootViewController = UINavigationController(rootViewController: DemoApplicationController(collectionViewLayout: layout))
FirebaseApp.configure()
return true
}
}
这里是 CollectionViewControllerDemoApplicationController.Swift
class DemoApplicationController: UICollectionViewController, UICollectionViewDelegateFlowLayout{
override func viewDidLoad() {
super.viewDidLoad()
//title Label
navigationController?.navigationBar.isTranslucent = false
let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: view.frame.width - 250, height: view.frame.height))
titleLabel.text = "Demo Application"
titleLabel.font = UIFont(name: "HelveticaNeue-Bold", size: 20)
navigationItem.titleView = titleLabel
titleLabel.textColor = UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00)
setupCollectionView()
}
lazy var enroll: EnrollCell = {
let en = EnrollCell()
en.demoController = self
return en
}()
func setupCollectionView() {
if let flowLayout = collectionView?.collectionViewLayout as? UICollectionViewFlowLayout {
flowLayout.scrollDirection = .horizontal
flowLayout.minimumLineSpacing = 0
}
collectionView?.backgroundColor = .white
collectionView.register(FeedCell.self, forCellWithReuseIdentifier: UsersCell.identifer)
collectionView?.register(EnrollCell.self, forCellWithReuseIdentifier: EnrollCell.identifier)
collectionView?.contentInset = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView?.scrollIndicatorInsets = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView.isPagingEnabled = true
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 2
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: UsersCell.identifer, for: indexPath)
if indexPath.item == 1 {
return collectionView.dequeueReusableCell(withReuseIdentifier: EnrollCell.identifier, for: indexPath)
}
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: view.frame.width, height: view.frame.height - 60)
}
}
extension DemoApplicationController : UIImagePickerControllerDelegate,UINavigationControllerDelegate{
@objc func pickTheImage() {
print(123)
let vc = UIImagePickerController()
vc.sourceType = .photoLibrary
vc.delegate = self
vc.allowsEditing = true
present(vc, animated: true, completion: nil)
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let image = info[UIImagePickerController.InfoKey(rawValue: "UIImagePickerControllerEditedImage")] as? UIImage {
print("imagepicked")
enroll.profileIG.image=image
}
dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: true, completion: nil)
}
}
}
第一个 CollectionViewCell 名为 FeedCell.swift
class FeedCell: BaseCell,UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout {
let db = Firestore.firestore()
var documentdata = ""
lazy var collectionView : UICollectionView = {
let layout = UICollectionViewFlowLayout()
let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
cv.backgroundColor = .white
cv.dataSource = self
cv.delegate = self
return cv
}()
override func setupViews() {
super.setupViews()
addSubview(collectionView)
addConstraintsWithFormat("H:|[v0]|", views: collectionView)
addConstraintsWithFormat("V:|[v0]|", views: collectionView)
collectionView.register(UsersCell.self, forCellWithReuseIdentifier: UsersCell.identifer)
loadUserData()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return dataFile.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: UsersCell.identifer, for: indexPath) as! UsersCell
cell.titleLabel.text = dataFile[indexPath.item].FirstName
cell.titleLabel.text?.append(" \(dataFile[indexPath.item].LastName)")
cell.subtitleTextView.text = dataFile[indexPath.item].Gender
cell.subtitleTextView.text.append(" | \(dataFile[indexPath.item].Age()) |")
cell.subtitleTextView.text.append(" \(dataFile[indexPath.item].homeTowndata)")
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
frameWidth = Int(frame.width)
return CGSize(width: frame.width, height: frame.height/8)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 0
}
}
第二个 CollectionViewCell 名为 EnrollCell.swift
class EnrollCell: UsersCell,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout{
var demoController = DemoApplicationController()
static let identifier = "EnrollKey"
let profileIG : UIImageView = {
let imageView = UIImageView()
// imageView.image = UIImage(named: "1")
imageView.backgroundColor = UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00)
imageView.layer.cornerRadius=22
imageView.layer.masksToBounds=true
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
let setProfilePhoto: UIButton = {
let profile = UIButton()
profile.setTitle("Select Profile Photo", for: .normal)
profile.setTitleColor(UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00), for: .normal)
profile.titleLabel?.font = UIFont(name: "HelveticaNeue-Bold", size: 16)
profile.translatesAutoresizingMaskIntoConstraints = false
return profile
}()
lazy var collectionView : UICollectionView = {
let layout = UICollectionViewFlowLayout()
let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
cv.backgroundColor = .white
cv.delegate = self
return cv
}()
override func setupViews() {
addSubview(profileIG)
addSubview(setProfilePhoto)
UserDataButton.addTarget(self, action: #selector(editButtonTapped), for: UIControl.Event.touchUpInside)
setProfilePhoto.addTarget(demoController.self, action: #selector(DemoApplicationController.pickTheImage), for: UIControl.Event.touchUpInside)
}
}
在您的 EnrollCell 中创建一个名为 pickTheImageDelegate 的协议，并将其作为委托并执行 DemoApplicationController 的操作以执行选择器控制器。
此处 EnrollCell.Swift 更新代码
import UIKit
import Firebase
protocol pickTheImageDelegate {
func pickTheImage()
}
class EnrollCell: UsersCell,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout{
var delegate : pickTheImageDelegate?
static let identifier = "EnrollKey"
var demoController : DemoApplicationController?
let profileIG : UIImageView = {
let imageView = UIImageView()
imageView.image = UIImage(named: "1")
imageView.layer.cornerRadius=22
imageView.layer.masksToBounds=true
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
let setProfilePhoto: UIButton = {
let profile = UIButton()
profile.setTitle("Select Profile Photo", for: .normal)
profile.setTitleColor(UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00), for: .normal)
profile.titleLabel?.font = UIFont(name: "HelveticaNeue-Bold", size: 16)
profile.translatesAutoresizingMaskIntoConstraints = false
return profile
}()
lazy var collectionView : UICollectionView = {
let layout = UICollectionViewFlowLayout()
let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
cv.backgroundColor = .white
cv.delegate = self
return cv
}()
override func setupViews() {
addSubview(profileIG)
addSubview(setProfilePhoto)
setProfilePhoto.backgroundColor = .white
UserDataButton.addTarget(self, action: #selector(editButtonTapped), for: UIControl.Event.touchUpInside)
setProfilePhoto.addTarget(demoController, action: #selector(DemoApplicationController.pickTheImage), for: UIControl.Event.touchUpInside)
addConstraintsWithFormat("H:|-150-[v0(100)]-150-|", views: profileIG)
addConstraintsWithFormat("V:|-50-[v0(100)]-16-|", views: profileIG)
addConstraintsWithFormat("H:|-105-[v0(\(frame.width/2))]|", views: setProfilePhoto)
addConstraintsWithFormat("V:|-150-[v0(35)]|", views: setProfilePhoto)
}
}
这里的DemoApplicationContrller.Swift就是我们的UICollectionViewController
import UIKit
class DemoApplicationController: UICollectionViewController, UICollectionViewDelegateFlowLayout{
var enroll : EnrollCell?
override func viewDidLoad() {
super.viewDidLoad()
//title Label
navigationController?.navigationBar.isTranslucent = false
let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: view.frame.width - 250, height: view.frame.height))
titleLabel.text = "Demo Application"
titleLabel.font = UIFont(name: "HelveticaNeue-Bold", size: 20)
navigationItem.titleView = titleLabel
titleLabel.textColor = UIColor(red: 0.12, green: 0.56, blue: 1.00, alpha: 1.00)
enroll?.delegate=self
setupCollectionView()
}
func setupCollectionView() {
if let flowLayout = collectionView?.collectionViewLayout as? UICollectionViewFlowLayout {
flowLayout.scrollDirection = .horizontal
flowLayout.minimumLineSpacing = 0
}
collectionView?.backgroundColor = .white
collectionView.register(FeedCell.self, forCellWithReuseIdentifier: UsersCell.identifer)
collectionView?.register(EnrollCell.self, forCellWithReuseIdentifier: EnrollCell.identifier)
collectionView?.contentInset = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView?.scrollIndicatorInsets = UIEdgeInsets(top: 50, left: 0, bottom: 0, right: 0)
collectionView.isPagingEnabled = true
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 2
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: UsersCell.identifer, for: indexPath)
if indexPath.item == 1 {
return collectionView.dequeueReusableCell(withReuseIdentifier: EnrollCell.identifier, for: indexPath)
}
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: view.frame.width, height: view.frame.height - 60)
}
}
extension DemoApplicationController : UIImagePickerControllerDelegate,UINavigationControllerDelegate,pickTheImageDelegate{
@objc func pickTheImage() {
let vc = UIImagePickerController()
vc.sourceType = .photoLibrary
vc.delegate = self
vc.allowsEditing = true
present(vc, animated: true, completion: nil)
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let image = info[UIImagePickerController.InfoKey(rawValue: "UIImagePickerControllerEditedImage")] as? UIImage {
enroll?.profileIG.image = image
}
dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: true, completion: nil)
}
}
}