swift 4.2调用系统相册和相机-优快云博客

本文介绍如何使用Swift在iOS应用中实现相机拍照和相册选取图片功能。通过创建CameraView视图类，实现相机按钮和相册按钮的响应，并在ViewController中处理图片选择事件，展示所选图片。

界面类, CameraView.swift文件代码:

import UIKit
import Foundation

class CameraView: UIView {
    
    var cameraButton : UIButton!
    
    var photoButton : UIButton!
    
    var image : UIImageView!
    
    override init(frame : CGRect)
        
    {
        
        super.init(frame: frame)
        
        cameraButtonMethods()
        
        photoButtonMethods()
        
        imageMethods()
        
    }
    
    required init?(coder aDecoder: NSCoder) {
        
        fatalError("init(coder:) has not been implemented")
        
    }
    
    
    func cameraButtonMethods(){
        
        
        cameraButton = UIButton(type: .custom)
        
        cameraButton.frame = CGRect(x: 20, y: 400, width: 100, height: 40)
        
        cameraButton.setTitle("调用相册", for: .normal)
        
        cameraButton.backgroundColor = UIColor.blue
        
        self.addSubview(cameraButton)
        
        
    }
    
    
    
    func photoButtonMethods(){
        
        photoButton = UIButton(type: .custom)
        
        photoButton.frame = CGRect(x: 255, y: 400, width: 100, height: 40)
        
        photoButton.backgroundColor = UIColor.blue
        
        photoButton.setTitle("调用相机", for: .normal)
        
        self.addSubview(photoButton)
        
    }
    
    
    
    func imageMethods(){
        
        image = UIImageView()
        
        image.image = UIImage(named: "image")
        
        image.frame = CGRect(x: 20, y: 40, width: 335, height: 335)
        
        self.addSubview(image)
        
    }
    
    
    
}

控制类 ViewController.swift 代码内容:

import UIKit
import AVFoundation

import AssetsLibrary

import Photos

class ViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate {
    
    
    var cameraView = CameraView()
    
    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = UIColor.white
        
        cameraView = CameraView(frame: UIScreen.main.bounds)
        
        self.view.addSubview(cameraView)
        
        cameraView.cameraButton.addTarget(self, action: #selector(ViewController.cameraEvent), for: .touchUpInside)
        
        cameraView.photoButton.addTarget(self, action: #selector(ViewController.photoEvent), for: .touchUpInside)
        
        // Do any additional setup after loading the view, typically from a nib.
    }
    
    
  
    
    var picker: UIImagePickerController?

    //相册
    @objc func cameraEvent(){
        
        let pickerCamera = UIImagePickerController()
        
        pickerCamera.allowsEditing = true
        pickerCamera.sourceType =  .photoLibrary
        pickerCamera.delegate = self
        
        self.present(pickerCamera, animated: true, completion: nil)
        
    }
    
    
    //相机
    @objc func photoEvent(){
        
        
        var sourceType = UIImagePickerController().sourceType
        sourceType = .camera
        
        if !UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.SourceType.camera){
            print("无法调用相机")
            sourceType = UIImagePickerController.SourceType.photoLibrary //改为调用相册
        }
        
        
        let pickerPhoto = UIImagePickerController()
        
        pickerPhoto.delegate = self

        pickerPhoto.allowsEditing = true//设置可编辑

        pickerPhoto.sourceType = sourceType

        self.present(pickerPhoto, animated: true, completion: nil)//进入照相界面
        
    }

    //MARK: - UIImagePickerControllerDelegate、UINavigationControllerDelegate
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        
        //UIImagePickerControllerOriginalImage  原始图像
        //UIImagePickerControllerEditedImage    编辑后的图片(开启编辑该对象才存在)

        
        var imagePickerc = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
        

        
        if picker.allowsEditing {
            imagePickerc = (info[UIImagePickerController.InfoKey.editedImage] as? UIImage)!
        }

        

        cameraView.image.image = imagePickerc
        
        self.dismiss(animated: true, completion: nil)
        
        
        
    }
    
    override func didReceiveMemoryWarning() {
        
        super.didReceiveMemoryWarning()
        
        // Dispose of any resources that can be recreated.
        
    }
    
    

//
//    //按取消按钮时候的功能
//    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
//        //    返回
//        picker.dismiss(animated: true)
//    }


}

运行界面:

image.png