import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var imgBtn: UIButton!
    @IBAction func btnAction(sender: UIButton) {
        
        //彈出選項(xiàng)框
        //a.創(chuàng)建警告框?qū)ο?        
        let alert = UIAlertController.init(title: "選擇頭像", message: nil, preferredStyle: .ActionSheet)
        
        //1.相冊
        let action1 = UIAlertAction.init(title: "相冊", style: .Default) { (_) -> Void in
            print("打開相冊")
            self.openPhotograph()
        }
        
        //2.相機(jī)
        let action2 = UIAlertAction.init(title: "相機(jī)", style: .Default) { (_) -> Void in
            print("打開相機(jī)")
            self.openCamera()
        }
        //3.取消
        let action3 = UIAlertAction.init(title: "取消", style: .Cancel) { (_) -> Void in
        }
        alert.addAction(action1)
        alert.addAction(action2)
        alert.addAction(action3)
        //c.彈出警告框
        self.presentViewController(alert, animated: true) { () -> Void in
            
        }
    }
   


}

//MARK: - 打開相冊
extension ViewController: UIImagePickerControllerDelegate,UINavigationControllerDelegate {
    
    //MARK: - 相機(jī)
    func openCamera() {
        //1.判斷當(dāng)前設(shè)備是否可以獲取相機(jī)
        let haveCamera = UIImagePickerController.isSourceTypeAvailable(.Camera)
        
        if haveCamera == false {
            print("不支持相機(jī)")
            return
        }
        
        //2.創(chuàng)建圖片選擇器對象
        let imagePicker = UIImagePickerController()
        
        //3.設(shè)置資源類型為相機(jī)
        imagePicker.sourceType = .Camera
        
        //4.允許圖片編輯
        imagePicker.allowsEditing = true
        
        //5.設(shè)置代理
        imagePicker.delegate = self
        
        //6.顯示圖片選擇器
        self.presentViewController(imagePicker, animated: true, completion: nil)
    }
    
    //MARK: -  相冊
    func openPhotograph() {
        
        //1.創(chuàng)建圖片選擇器
        let imagePicker = UIImagePickerController.init()
        
        //2.設(shè)置
        //Camera -> 圖片從相機(jī)獲得
        //PhotoLibray -> 相冊
        //SavedPhotosAlbum -> 圖冊(包括保存到手機(jī)中的圖片)
        imagePicker.sourceType = .PhotoLibrary
        
        //4.設(shè)置代理
        imagePicker.delegate = self
        
        //3.顯示圖片選擇器
        self.presentViewController(imagePicker, animated: true, completion: nil)
        //5.設(shè)置圖片可以編輯
        imagePicker.allowsEditing = true
        
    
    }
    
    //選中相冊中的一張圖片后會自動調(diào)用的方法
    //參數(shù)2:s所選中的媒體的所有的信息列表

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        //"UIImagePickerControllerOriginalImage" -> 被選中的圖片對象
        //1.
        //a.獲取選中的圖片的原圖
        let image1 = info["UIImagePickerControllerOriginalImage"]
        as! UIImage
        //b.獲取編輯之后的圖片
        let image2 = info["UIImagePickerControllerEditedImage"]
            as! UIImage

        //2.將圖片顯示在按鈕上
        self.imgBtn.setImage(image2, forState: .Normal)
        //3.讓圖片選擇器消失
        picker.dismissViewControllerAnimated(true, completion: nil)
         print(info)
    }
}