如何在swift中同时为相机和照片库提供UIImagePickerController

问题描述

我使用UIImagePickerController通过iPhone的相机拍照。

I use UIImagePickerController to take a photo by camera of iPhone.

我想要显示两张拍照和选择一张照片。

I want to show two "take a photo" and "choose a photo".

我的代码

imagePicker =  UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .camera
//imagePicker.sourceType = .PhotoLibrary
presentViewController(imagePicker, animated: true, completion: nil)

我试图使用 imagePicker.sourceType = .Camera 和 imagePicker .sourceType = .PhotoLibrary 一起做这个，但它不起作用...

I tried to use imagePicker.sourceType = .Camera and imagePicker.sourceType = .PhotoLibrary together to do this, but it doesn't work...

谢谢

推荐答案

导入 UIImagePickerControllerDelegate 并创建一个变量来分配UIImagePickerController
var imagePicker = UIImagePickerController（）
并设置 imagePicker.delegate = self 。

Import UIImagePickerControllerDelegate and create a variable to assign UIImagePickerControllervar imagePicker = UIImagePickerController() and set imagePicker.delegate = self.

创建一个操作表以显示Cam的选项时代'和'照片库'。

Create a action sheet to display options for 'Camera' and 'Photo library'.

点击按钮点击操作：

@IBAction func buttonOnClick(_ sender: UIButton)
{
    self.btnEdit.setTitleColor(UIColor.white, for: .normal)
    self.btnEdit.isUserInteractionEnabled = true

    let alert = UIAlertController(title: "Choose Image", message: nil, preferredStyle: .actionSheet)
    alert.addAction(UIAlertAction(title: "Camera", style: .default, handler: { _ in
        self.openCamera()
    }))

    alert.addAction(UIAlertAction(title: "Gallery", style: .default, handler: { _ in
        self.openGallary()
    }))

    alert.addAction(UIAlertAction.init(title: "Cancel", style: .cancel, handler: nil))

    /*If you want work actionsheet on ipad
    then you have to use popoverPresentationController to present the actionsheet,
    otherwise app will crash on iPad */
    switch UIDevice.current.userInterfaceIdiom {
    case .pad:
        alert.popoverPresentationController?.sourceView = sender
        alert.popoverPresentationController?.sourceRect = sender.bounds
        alert.popoverPresentationController?.permittedArrowDirections = .up
    default:
        break
    }

    self.present(alert, animated: true, completion: nil)
}

func openCamera()
{
    if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.camera))
    {
        imagePicker.sourceType = UIImagePickerControllerSourceType.camera
        imagePicker.allowsEditing = true
        self.present(imagePicker, animated: true, completion: nil)
    }
    else
    {
        let alert  = UIAlertController(title: "Warning", message: "You don't have camera", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
        self.present(alert, animated: true, completion: nil)
    }
}

func openGallary()
{
    imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
    imagePicker.allowsEditing = true
    self.present(imagePicker, animated: true, completion: nil)
}

从下载示例项目。

这篇关于如何在swift中同时为相机和照片库提供UIImagePickerController的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！