一, 聲明相框和按鈕

    var imageView : UIImageView!
    var button : UIButton!

        imageView = UIImageView.init(frame: CGRectMake(50, 200, 300, 300))
        imageView.backgroundColor = UIColor.cyanColor()
        self.view.addSubview(imageView)
        imageView.userInteractionEnabled = true
        
        button = UIButton.init(frame: CGRectMake(50, 50, 300, 50))
        button.backgroundColor = UIColor.redColor()
        button.setTitle("選取本地圖片", forState: UIControlState.Normal)
        button.addTarget(self,action:#selector(ViewController.huantu),forControlEvents:.TouchUpInside)
        self.view.addSubview(button)
    

最初.png

二, 創(chuàng)建提示框

extension ViewController {
        var selectorController: UIAlertController {
        let controller = UIAlertController(title: nil, message: nil, preferredStyle: .ActionSheet)
        controller.addAction(UIAlertAction(title: "取消", style: .Cancel, handler: nil)) // 取消按鈕
        controller.addAction(UIAlertAction(title: "拍照選擇", style: .Default) { action in
            self.selectorSourceType(.Camera)
            }) // 拍照選擇
        controller.addAction(UIAlertAction(title: "相冊(cè)選擇", style: .Default) { action in
            self.selectorSourceType(.PhotoLibrary)
            }) // 相冊(cè)選擇
        return controller
    }
    
    func huantu(){
        presentViewController(selectorController, animated: true, completion: nil)
        
    }
    
    func selectorSourceType(type: UIImagePickerControllerSourceType) {
        imagePickerController.sourceType = type
        // 打開圖片選擇器
        presentViewController(imagePickerController, animated: true, completion: nil)
    }
}

彈框.png

三, 擴(kuò)展圖片選擇和結(jié)果返回

extension ViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    // MARK: 圖片選擇器界面
    var imagePickerController: UIImagePickerController {
        get {
            let imagePicket = UIImagePickerController()
            imagePicket.delegate = self
            imagePicket.sourceType = .PhotoLibrary
            return imagePicket
        }
    }
    
    // MARK: 當(dāng)圖片選擇器選擇了一張圖片之后回調(diào)
    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String: AnyObject]) {
        dismissViewControllerAnimated(true, completion: nil) // 選中圖片, 關(guān)閉選擇器...這里你也可以 picker.dismissViewControllerAnimated 這樣調(diào)用...但是效果都是一樣的...
        
        imageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage // 顯示圖片
        imageView.contentMode = .ScaleToFill // 縮放顯示, 便于查看全部的圖片
    }
    
    // MARK: 當(dāng)點(diǎn)擊圖片選擇器中的取消按鈕時(shí)回調(diào)
    func imagePickerControllerDidCancel(picker: UIImagePickerController) {
        picker.dismissViewControllerAnimated(true, completion: nil) // 效果一樣的...
    }

選擇本地圖片.png

四, 最終效果

顯示效果.png