[iOS study] 搭配 UIImagePickerController 選照片

練習delegate, imagePickerController, AlertController

點選button後跳出由下而上彈出的選單視窗

顯示警告訊息和選單的 UIAlertController

@IBAction func ImageButton(_ sender: UIButton) {
let controller = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
let cameraAction = UIAlertAction(title: "開啟相機拍照", style: .default) { (_) in
...
}
let libraryAction = UIAlertAction(title: "從相簿中選擇", style: .default) { (_) in
...
}
let deleteAction = UIAlertAction(title: "刪除", style: .destructive) { (_) in
sender.setImage(UIImage(named: "user"), for: .normal)
}
let cancelAction = UIAlertAction(title: "取消", style: .cancel, handler: nil)
controller.addAction(cameraAction)
controller.addAction(libraryAction)
controller.addAction(deleteAction)
controller.addAction(cancelAction)
present(controller, animated: true, completion: nil)
}

從相簿中選擇照片

func photopicker(){
let photoController = UIImagePickerController()
photoController.delegate = self
photoController.sourceType = .photoLibrary
present(photoController, animated: true, completion: nil)
}
@IBAction func ImageButton(_ sender: UIButton) {
...
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let image = info[.originalImage] as? UIImage
buttonImage.setImage(image, for: .normal)
dismiss(animated: true, completion: nil)
}

開啟相機功能，無法模擬器測試，但是我的iphone版本跟xcode版本無法測試......(只好這次先展示相簿就好，改天再試相機）

github:

yolanda0213h/ImageDelegate