Swift 学习笔记(四)

2019-01-22

Developing

这次尝试了调用摄像头 //原来iOS Simulators 是没有摄像头的啊 //于是用真机调试…

文件 ViewController.swift


import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

	override func viewDidLoad() {
		super.viewDidLoad()
		// Do any additional setup after loading the view, typically from a nib.
	}
	
	
	@IBAction func buttonOne(_ sender: Any) {
		print("touch button")
	
		let imagePickerController: UIImagePickerController = UIImagePickerController()
		//print(UIImagePickerController.isSourceTypeAvailable(.camera))//可以用if判断有没有摄像头
		imagePickerController.modalTransitionStyle = .flipHorizontal
		imagePickerController.allowsEditing = true//允许编辑
		imagePickerController.sourceType = .camera//数据来源为摄像头
		imagePickerController.videoMaximumDuration = 15 //录制视频长度/秒
		imagePickerController.mediaTypes = ["public.image","public.movie"] //允许的相机类型
		imagePickerController.videoQuality = .typeHigh//视频质量
		imagePickerController.cameraCaptureMode = .photo //初始摄像头模式/拍照 摄像
		self.present(imagePickerController, animated: true){
			() -> Void in
			print("ok")
		}
	}
	
}

其中用到摄像头，要到 Info.plist中加上 Privacy - Camera Usage Description 向用户请求摄像头权限如果是录制视频还需要加上 Privacy - Microphone Usage Description 向用户请求录制视频声音没有以上两句会导致程序崩溃并在命令框里显示错误信息

参考资料 : 参考资料