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Swift 学习笔记(四)

22 January 2019

by aiQG_

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

Swift

return

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