通过表格视图单元格中的按钮将图像导入图像视图
import image to imageview via button in tableview cell
我想通过 tableviw 单元格中的按钮导入照片。因此特定 table 视图单元格中的按钮将图像导入该特定单元格中的图像视图。因此，一个按钮将图像导入到该特定单元格中的一个图像视图。我尝试将照片导入代码放在 table 视图单元格 class 中。代码未编译。
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = "\(indexPath.row)"
return cell
}
var numberOfRows = 3
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { numberOfRows }
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 118
}
var tableView = UITableView()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
setTableVIew()
}
func setTableVIew(){
let VCframe = self.view.frame
let height = VCframe.height * 0.8
let widthx = VCframe.width
tableView.frame = CGRect(x: 0, y: 0, width: widthx, height: height)
tableView.delegate = self
tableView.dataSource = self
self.view.addSubview(tableView)
tableView.backgroundColor = .blue
tableView.register(customtv.self, forCellReuseIdentifier: "cell")
}
}
class customtv: UITableViewCell , UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var imagePicker: UIImagePickerController!
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
// The info dictionary may contain multiple representations of the image. You want to use the original.
guard let selectedImage = info[.originalImage] as? UIImage else {
fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
}
// Set photoImageView to display the selected image.
imageDisplayer.image = selectedImage
// Dismiss the picker.
dismiss(animated: true, completion: nil)
}
@objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
if let error = error {
// we got back an error!
let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
} else {
let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
}
}
lazy var backView : UIView = {
let view = UIView(frame: CGRect(x: 10, y: 6, width: self.frame.width, height: 110))
view.backgroundColor = .green
print(self.frame.width)
return view
}()
lazy var press : UIButton = {
let press = UIButton(frame: CGRect(x: 2, y: 3, width: 65 , height: 50))
press.backgroundColor = .systemOrange
press.setTitle("import", for: .normal)
press.addTarget(self, action: #selector(importPhoto), for: .touchDown)
return press
}()
lazy var imageDisplayer : UIImageView = {
let press = UIImageView(frame: CGRect(x: 100, y: 3, width: 80 , height: 90))
press.backgroundColor = .systemPink
return press
}()
@objc func importPhoto(){
imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary
present(imagePicker, animated: true, completion: nil)
}
override func layoutSubviews() {
backView.clipsToBounds = true
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(animated, animated: true)
addSubview(backView)
backView.addSubview(press)
backView.addSubview(imageDisplayer)
}
}
您必须在 ViewController 中显示 UIImagePickerController 而不是 customtv。
在ViewController中：
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var numberOfRows = 3
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { numberOfRows }
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { 118 }
var tableView = UITableView()
var selectedIndexPath = IndexPath(row: 0, section: 0)
override func viewDidLoad() {
super.viewDidLoad()
setTableVIew()
}
func setTableVIew(){
let VCframe = view.frame
let height = VCframe.height * 0.8
let widthx = VCframe.width
tableView.frame = CGRect(x: 0, y: 0, width: widthx, height: height)
tableView.delegate = self
tableView.dataSource = self
view.addSubview(tableView)
tableView.backgroundColor = .blue
tableView.register(customtv.self, forCellReuseIdentifier: "cell")
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! customtv
cell.textLabel?.text = "\(indexPath.row)"
cell.press.tag = indexPath.row
cell.press.addTarget(self, action: #selector(importPhoto), for: .touchDown)
return cell
}
@objc func importPhoto(_ button: UIButton) {
selectedIndexPath = IndexPath(row: button.tag, section: 0)
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary
present(imagePicker, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
guard let selectedImage = info[.originalImage] as? UIImage else {
fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
}
guard let cell = tableView.cellForRow(at: selectedIndexPath) as? customtv else { return }
cell.imageDisplayer.image = selectedImage
tableView.reloadRows(at: [selectedIndexPath], with: .automatic)
dismiss(animated: true, completion: nil)
}
@objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
if let error = error {
// we got back an error!
let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
} else {
let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
}
}
}
在customtv中：
class customtv: UITableViewCell {
lazy var backView : UIView = {
let view = UIView(frame: CGRect(x: 10, y: 6, width: self.frame.width, height: 110))
view.backgroundColor = .green
print(self.frame.width)
return view
}()
lazy var press : UIButton = {
let press = UIButton(frame: CGRect(x: 2, y: 3, width: 65 , height: 50))
press.backgroundColor = .systemOrange
press.setTitle("import", for: .normal)
return press
}()
lazy var imageDisplayer : UIImageView = {
let press = UIImageView(frame: CGRect(x: 100, y: 3, width: 80 , height: 90))
press.backgroundColor = .systemPink
return press
}()
override func layoutSubviews() {
backView.clipsToBounds = true
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(animated, animated: true)
addSubview(backView)
backView.addSubview(press)
backView.addSubview(imageDisplayer)
}
}
我想通过 tableviw 单元格中的按钮导入照片。因此特定 table 视图单元格中的按钮将图像导入该特定单元格中的图像视图。因此，一个按钮将图像导入到该特定单元格中的一个图像视图。我尝试将照片导入代码放在 table 视图单元格 class 中。代码未编译。
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = "\(indexPath.row)"
return cell
}
var numberOfRows = 3
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { numberOfRows }
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 118
}
var tableView = UITableView()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
setTableVIew()
}
func setTableVIew(){
let VCframe = self.view.frame
let height = VCframe.height * 0.8
let widthx = VCframe.width
tableView.frame = CGRect(x: 0, y: 0, width: widthx, height: height)
tableView.delegate = self
tableView.dataSource = self
self.view.addSubview(tableView)
tableView.backgroundColor = .blue
tableView.register(customtv.self, forCellReuseIdentifier: "cell")
}
}
class customtv: UITableViewCell , UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var imagePicker: UIImagePickerController!
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
// The info dictionary may contain multiple representations of the image. You want to use the original.
guard let selectedImage = info[.originalImage] as? UIImage else {
fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
}
// Set photoImageView to display the selected image.
imageDisplayer.image = selectedImage
// Dismiss the picker.
dismiss(animated: true, completion: nil)
}
@objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
if let error = error {
// we got back an error!
let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
} else {
let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
}
}
lazy var backView : UIView = {
let view = UIView(frame: CGRect(x: 10, y: 6, width: self.frame.width, height: 110))
view.backgroundColor = .green
print(self.frame.width)
return view
}()
lazy var press : UIButton = {
let press = UIButton(frame: CGRect(x: 2, y: 3, width: 65 , height: 50))
press.backgroundColor = .systemOrange
press.setTitle("import", for: .normal)
press.addTarget(self, action: #selector(importPhoto), for: .touchDown)
return press
}()
lazy var imageDisplayer : UIImageView = {
let press = UIImageView(frame: CGRect(x: 100, y: 3, width: 80 , height: 90))
press.backgroundColor = .systemPink
return press
}()
@objc func importPhoto(){
imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary
present(imagePicker, animated: true, completion: nil)
}
override func layoutSubviews() {
backView.clipsToBounds = true
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(animated, animated: true)
addSubview(backView)
backView.addSubview(press)
backView.addSubview(imageDisplayer)
}
}
您必须在 ViewController 中显示 UIImagePickerController 而不是 customtv。
在ViewController中：
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var numberOfRows = 3
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { numberOfRows }
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { 118 }
var tableView = UITableView()
var selectedIndexPath = IndexPath(row: 0, section: 0)
override func viewDidLoad() {
super.viewDidLoad()
setTableVIew()
}
func setTableVIew(){
let VCframe = view.frame
let height = VCframe.height * 0.8
let widthx = VCframe.width
tableView.frame = CGRect(x: 0, y: 0, width: widthx, height: height)
tableView.delegate = self
tableView.dataSource = self
view.addSubview(tableView)
tableView.backgroundColor = .blue
tableView.register(customtv.self, forCellReuseIdentifier: "cell")
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! customtv
cell.textLabel?.text = "\(indexPath.row)"
cell.press.tag = indexPath.row
cell.press.addTarget(self, action: #selector(importPhoto), for: .touchDown)
return cell
}
@objc func importPhoto(_ button: UIButton) {
selectedIndexPath = IndexPath(row: button.tag, section: 0)
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary
present(imagePicker, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
guard let selectedImage = info[.originalImage] as? UIImage else {
fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
}
guard let cell = tableView.cellForRow(at: selectedIndexPath) as? customtv else { return }
cell.imageDisplayer.image = selectedImage
tableView.reloadRows(at: [selectedIndexPath], with: .automatic)
dismiss(animated: true, completion: nil)
}
@objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
if let error = error {
// we got back an error!
let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
} else {
let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
}
}
}
在customtv中：
class customtv: UITableViewCell {
lazy var backView : UIView = {
let view = UIView(frame: CGRect(x: 10, y: 6, width: self.frame.width, height: 110))
view.backgroundColor = .green
print(self.frame.width)
return view
}()
lazy var press : UIButton = {
let press = UIButton(frame: CGRect(x: 2, y: 3, width: 65 , height: 50))
press.backgroundColor = .systemOrange
press.setTitle("import", for: .normal)
return press
}()
lazy var imageDisplayer : UIImageView = {
let press = UIImageView(frame: CGRect(x: 100, y: 3, width: 80 , height: 90))
press.backgroundColor = .systemPink
return press
}()
override func layoutSubviews() {
backView.clipsToBounds = true
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(animated, animated: true)
addSubview(backView)
backView.addSubview(press)
backView.addSubview(imageDisplayer)
}
}