Swift 打开图库

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Swift 打开图库

Swift版本： 3.0

代码

1. 首先在info.plist内添加两个参数如下, 给足权限，否则无法打开图库

   Key : Privacy - Media Library Usage Description
   Value : YES  [ It is not boolean, it is String ]Key : Privacy - Photo Library Usage Description
   Value : YES [ It is not boolean, it is String ]

2. 在ViewController中改为如下代码

   import UIKit
   // 首先在头部加入当前Controller需要遵从的代理
   class ViewController: UIViewController,
   UIImagePickerControllerDelegate,
   UINavigationControllerDelegate{override func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view, typically from a nib.
   }override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.
   }// 创建一个对象
   // 这个对象是用来在屏幕上显示
   @IBOutlet weak var imagePicked: UIImageView!
   // 这个Action方法对应着屏幕上的按钮，该按钮点击后会调用图库
   @IBAction func add(_ sender: UIBarButtonItem) {
   // 判断数据源是否合法，这里的.photoLibrary省略了其类名，Swift会自动推导if UIImagePickerController.isSourceTypeAvailable(.photoLibrary){let imagePicker = UIImagePickerController()imagePicker.delegate = selfimagePicker.sourceType = .photoLibraryimagePicker.allowsEditing = true// 这一句，开始调用图库self.present(imagePicker,animated: true)}
   }
   // 实现代理的方法
   // 注意，这里和swift3.0之前的版本实现方法都不太一样，这是唯一的写法，网上流传的其他方法都是过时的func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {if let image = info[UIImagePickerControllerOriginalImage] as? UIImage{// 将图片显示给UIImageViewimagePicked.image = image}else{print("pick image wrong")}// 收回图库选择界面self.dismiss(animated: true, completion: nil)
   }
   }

实际效果

打开图库

显示到界面

参考：

完整demo下载链接