Swift相机相册的简单使用

1.配置权限：

（1）相机权限：
key：Privacy - Camera Usage Description
value：拍摄照片需要获取相机权限
（2）相册权限：
key：Privacy - Photo Library Usage Description
value：选择图片需要获取相册权限

2.代码：

//MARK: - UIImagePickerControllerDelegate,UINavigationControllerDelegate
extension EditUserInfoController: UIImagePickerControllerDelegate,UINavigationControllerDelegate {
    
    func openCamera() {
        let picker = UIImagePickerController()
        picker.delegate = self
        if UIImagePickerController.isCameraDeviceAvailable(.rear) {
            picker.sourceType = .camera
            self.present(picker, animated: true, completion: nil)
        } else {
            HUDTool.showText(text: "暂无相机权限")
        }
    }
    
    func openAlbum() {
        let picker = UIImagePickerController()
        picker.delegate = self
        if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
            picker.sourceType = .photoLibrary
            self.present(picker, animated: true, completion: nil)
        } else {
            HUDTool.showText(text: "暂无相册权限")
        }
    }
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]){
        picker.dismiss(animated: true, completion: nil)
        let image = info[UIImagePickerControllerOriginalImage] as! UIImage
        self.portraitImageView.image = image
    }
    
    //裁剪图片
    func imageWithImageSimple(image:UIImage,scaledToSize newSize:CGSize)->UIImage{
        var width:CGFloat!
        var height:CGFloat!
        if image.size.width/newSize.width >= image.size.height / newSize.height{
            width = newSize.width
            height = image.size.height / (image.size.width/newSize.width)
        }else{
            height = newSize.height
            width = image.size.width / (image.size.height/newSize.height)
        }
        let sizeImageSmall = CGSize(width:width,height:height)
        //print(sizeImageSmall)
        UIGraphicsBeginImageContext(sizeImageSmall);
        image.draw(in: CGRect(x:0,y:0,width:sizeImageSmall.width,height:sizeImageSmall.height))
        let newImage:UIImage=UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext();
        return newImage;
    }
}

3.增加图片编辑功能：

//允许图片编辑
picker.allowsEditing = true

//在 imagePickerController 代理方法中获取编辑后的图片
let image = info[UIImagePickerControllerEditedImage] as! UIImage