如果是相机使用,需要在info.plist文件增加使用前应用程序说明;相机使用也是如此。(第二个是CALENDARS权限,打错了;图片是Photo Library Usage Description)
使用UIImagePickerController进行图片选择需要实现UIImagePickerControllerDelegate, UINavigationControllerDelegate
这两个代理。因为图片选择视图控制器属于系统内定义的NavigationController。
import UIKit
class ImageViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var buttonSelect: UIButton!
var imageView: UIImageView!
private func initView(){
buttonSelect = UIButton(type: .system)
buttonSelect.setTitle("Select", for: UIControl.State.normal)
buttonSelect.frame = CGRect(x: ((self.view.frame.width / 2) - 35), y: (self.view.frame.width - 200), width: 70, height: 30)
buttonSelect.addTarget(self, action: #selector(selectPicture), for: UIControl.Event.touchDown)
self.view.addSubview(buttonSelect)
imageView = UIImageView(frame: CGRect(x: ((self.view.frame.width / 2) - 120), y: ((self.view.frame.height / 2) + 50), width: 240, height: 240))
imageView.image = UIImage(named: "taylor")
self.view.addSubview(imageView)
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
initView()
}
@objc func selectPicture(){
// 设置源为相机
if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
//创建图片选择控制器
let pickerVC = UIImagePickerController()
pickerVC.delegate = self
// 设置源为相机
pickerVC.sourceType = UIImagePickerController.SourceType.photoLibrary
self.present(pickerVC, animated: true, completion: nil)
} else {
print("------> ERROR")
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
print("------> INFO:\(info)")
let image: UIImage!
image = info[.originalImage] as? UIImage
self.imageView.image = image
picker.dismiss(animated: true, completion: nil)
}
}
需要说明的是,info
这个对象是个数组,里面存放的是原始图片与修改后的图片。例如info[.originalImage]
是原始图片。
import UIKit
class ImageViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var buttonSelect: UIButton!
var imageView: UIImageView!
private func initView(){
buttonSelect = UIButton(type: .system)
buttonSelect.setTitle("Select", for: UIControl.State.normal)
buttonSelect.frame = CGRect(x: ((self.view.frame.width / 2) - 35), y: (self.view.frame.width - 200), width: 70, height: 30)
buttonSelect.addTarget(self, action: #selector(selectPicture), for: UIControl.Event.touchDown)
self.view.addSubview(buttonSelect)
imageView = UIImageView(frame: CGRect(x: ((self.view.frame.width / 2) - 120), y: ((self.view.frame.height / 2) + 50), width: 240, height: 240))
imageView.image = UIImage(named: "taylor")
self.view.addSubview(imageView)
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
initView()
}
@objc func selectPicture(){
if UIImagePickerController.isSourceTypeAvailable(.camera) {
let pickerVC = UIImagePickerController()
pickerVC.delegate = self
pickerVC.sourceType = UIImagePickerController.SourceType.camera
self.present(pickerVC, animated: true, completion: nil)
} else {
print("------> ERROR")
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
print("------> INFO:\(info)")
let image: UIImage!
image = info[.originalImage] as? UIImage
self.imageView.image = image
picker.dismiss(animated: true, completion: nil)
}
}
闪光灯开启:
pickerVC.cameraFlashMode = UIImagePickerControllerCameraFlashMode.On
使用后置相机:
if UIImagePickerController.isCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Front){
pickerVC.cameraDevice = UIImagePickerControllerCameraDevice.Front
}