Swift之本地相册获取图片

最近做的项目中用到了从本地相册获取图片，所以整理出来分享给大家 Y^oY

因为我们要用到相册，所以我们要遵循两个代理UIImagePickerControllerDelegate,UINavigationControllerDelegate,因为我用到了手势点击图片，所以又遵循了UIGestureRecognizerDelegate，好啦，我们来看代码

import UIKit

class ViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIGestureRecognizerDelegate {

var imageView: UIImageView?
var imageUrl: NSURL?

override func viewDidLoad() {
    super.viewDidLoad()

   //创建一个imageView 将图片设置成圆形
    imageView = UIImageView(frame: CGRectMake(100, 100, 80, 80))
    imageView?.userInteractionEnabled = true
    imageView?.backgroundColor = UIColor.cyanColor()
    imageView?.layer.masksToBounds = true
    imageView?.layer.cornerRadius = 40.0
    view.addSubview(imageView!)
    
    //添加手势
    let tap = UITapGestureRecognizer(target: self, action: #selector(ViewController.tapGesture(_:)))
    tap.delegate = self
    tap.numberOfTapsRequired = 1
    tap.numberOfTouchesRequired = 1
    imageView!.addGestureRecognizer(tap)
}

//点击头像
func tapGesture(tap:UITapGestureRecognizer) {
    let aleat = UIAlertController(title: "照片选择", message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
    weak var weakSelf = self;
    let aleartAction = UIAlertAction(title: "相册", style: UIAlertActionStyle.Default) { (_) -> Void in
        
        self.imageVC.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
        weakSelf!.presentViewController(self.imageVC, animated: true, completion: nil);
        
    }
    let aleartAction_two = UIAlertAction(title: "相机", style: UIAlertActionStyle.Default) { (_) -> Void in
        
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)
        {
            weakSelf!.imageVC.sourceType = UIImagePickerControllerSourceType.Camera
            weakSelf?.presentViewController(weakSelf!.imageVC, animated: true
                , completion: nil)
        }
    }
    let aleartAction_cancel = UIAlertAction(title: "取消", style: UIAlertActionStyle.Cancel) { (_) -> Void in
        
    }
    aleat.addAction(aleartAction);
    aleat.addAction(aleartAction_two);
    aleat.addAction(aleartAction_cancel);
    self.presentViewController(aleat, animated: true, completion: nil);
}

//懒加载创建imageVC
private lazy var imageVC:UIImagePickerController = {
    let imageVc = UIImagePickerController()
    imageVc.delegate = self
    return imageVc;
}()
// 选择完成图片后调用的方法
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    //获取点击图片的url和image
    imageUrl = info["UIImagePickerControllerReferenceURL"] as? NSURL
    let image = info["UIImagePickerControllerOriginalImage"] as? UIImage
 
    let imageView = UIImageView()
    imageView.image = image
    imageView.frame = self.imageView!.frame
    imageView.layer.masksToBounds = true
    imageView.layer.cornerRadius = 40.0
    view.addSubview(imageView)
    
    dismissViewControllerAnimated(true, completion: nil)
    
}
override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}
}

好啦，今天就分享到这里咯，请大家多多指教，( ^_ )/~~拜拜