swift3.0调用相机和相册 简单实用

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1、首先，swift3.0中调用相机和相册会导致崩溃，需要在info.plist文件中加入两个键值对，如下：

Privacy - Photo Library Usage Description  和 Privacy - Camera Usage Description ，都是String类型，内容任意的字符串即可。

2、废话少说，上代码！

class MyController:UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate
{    

    

    var uploadAlertController:UIAlertController!

    var imagePickerController:UIImagePickerController!

    @IBOutletweakvar headImg:UIImageView!

    

    overridefunc viewDidLoad() {

        super.viewDidLoad()

        

        self.initAlertController()

        self.initImagePickerController()

    }   

    func initAlertController()

    {

        weakvar blockSelf =self

        self.uploadAlertController =UIAlertController(title:nil,
message: nil, preferredStyle:UIAlertControllerStyle.actionSheet)

        self.uploadAlertController.view.tintColor
= DeepMainColor

        let takePhoto =UIAlertAction(title:"拍照",
style:UIAlertActionStyle.default) { (action:UIAlertAction)in

            blockSelf?.actionAction(action: action)

        }

        let photoLib =UIAlertAction(title:"从相册选择",
style:UIAlertActionStyle.default) { (action:UIAlertAction)in

            blockSelf?.actionAction(action: action)

        }

        let cancel =UIAlertAction(title:"取消",
style:UIAlertActionStyle.cancel) { (action:UIAlertAction)in

            blockSelf?.actionAction(action: action)

        }

        self.uploadAlertController?.addAction(takePhoto)

        self.uploadAlertController?.addAction(photoLib)

        self.uploadAlertController?.addAction(cancel)

    }

    func initImagePickerController()

    {

        self.imagePickerController =UIImagePickerController()

        self.imagePickerController.delegate
= self

       
// 设置是否可以管理已经存在的图片或者视频

        self.imagePickerController.allowsEditing
= true

    }

    func actionAction(action:UIAlertAction)

    {

        if action.title =="拍照"
{

            self.getImageFromPhotoLib(type: .camera)

        }elseif action.title =="从相册选择"||
action.title =="更换头像"
{

            self.getImageFromPhotoLib(type: .photoLibrary)

        }elseif action.title =="删除照片"
{

            self.headImg.image =UIImage(named:"head")

        }

    }

    func getImageFromPhotoLib(type:UIImagePickerControllerSourceType)

    {

        self.imagePickerController.sourceType
= type

        //判断是否支持相册

        ifUIImagePickerController.isSourceTypeAvailable(.photoLibrary)
{

            self.present(self.imagePickerController,
animated: true, completion:nil)

        }

    }

    //MARK:- UIImagePickerControllerDelegate

    func imagePickerController(_ picker:UIImagePickerController, didFinishPickingMediaWithInfo
info: [String :Any]){

        

        let type:String = (info[UIImagePickerControllerMediaType]as!String)

        //当选择的类型是图片

        if type=="public.image"

        {

            let img = info[UIImagePickerControllerOriginalImage]as?UIImage

            self.headImg.image =cropToBounds(image:
img!)

            let imgData =UIImageJPEGRepresentation(self.headImg.image!,0.5) 
          

            picker.dismiss(animated:true, completion:nil)

        }        

    }

    func imagePickerControllerDidCancel(_ picker:UIImagePickerController){

        picker.dismiss(animated:true, completion:nil)

    }    

    @IBActionfunc headImgTapGesture(_ sender:AnyObject)
{

        present(self.uploadAlertController, animated:true,
completion: nil)

    }    

}