ios简易版相机

最新推荐文章于 2024-08-29 07:58:57 发布

原创最新推荐文章于 2024-08-29 07:58:57 发布 · 488 阅读

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本文介绍了一个简易相机Demo的实现，支持手动对焦功能。通过Objective-C编程，利用AVFoundation框架，实现了iOS平台上的相机应用。该应用可以调整对焦模式，并通过触摸屏幕改变对焦点。

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让ChatGPT给我写了一个简易相机demo，支持手动对焦，真香

// CameraVC.m

// AWOpenDemo

// Created by yikunHuang on 2022/12/7.

#import "CameraVC.h"

#import <AVFoundation/AVFoundation.h>

@interface CameraVC ()

@property(strong, nonatomic)AVCaptureDevice *device;

@property(strong, nonatomic)AVCaptureSession *session;

@end

@implementation CameraVC

- (void)viewDidLoad {

[super viewDidLoad];

UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(100, 100, 50, 50)];

[btn addTarget:self action:@selector(capture) forControlEvents:UIControlEventTouchUpInside ];

btn.backgroundColor = [UIColor whiteColor];

btn.titleLabel.text = @"拍照";

// 获取默认的摄像头设备

AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

self.device = device;

// 支持手动对焦

if ([device isFocusModeSupported:AVCaptureFocusModeLocked]) {

NSError *error;

if ([device lockForConfiguration:&error]) {

// 成功获取配置锁，可以进行摄像头设备的配置操作

// 设置对焦模式为手动对焦

device.focusMode = AVCaptureFocusModeLocked;

// 释放配置锁

[device unlockForConfiguration];

} else {

// 获取配置锁失败，可能是其他应用或程序正在使用摄像头设备

}

// 创建会话

AVCaptureSession *session = [[AVCaptureSession alloc] init];

self.session = session;

// 创建摄像头输入

AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];

// 创建摄像头输出

AVCaptureStillImageOutput *output = [[AVCaptureStillImageOutput alloc] init];

// 添加摄像头输入

if ([session canAddInput:input]) {

[session addInput:input];

}

// 添加摄像头输出

if ([session canAddOutput:output]) {

[session addOutput:output];

}

// 创建预览层

AVCaptureVideoPreviewLayer *previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:session];

previewLayer.frame = self.view.bounds;

[self.view.layer addSublayer:previewLayer];

// 启动会话

[session startRunning];

[self.view addSubview:btn];

}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

// 获取触摸点

UITouch *touch = touches.anyObject;

// 获取触摸点在屏幕中的坐标

CGPoint point = [touch locationInView:self.view];

// 判断摄像头设备是否支持手动对焦

if ([self.device isFocusPointOfInterestSupported] && [self.device isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {

// 获取配置锁

NSError *error;

if ([self.device lockForConfiguration:&error]) {

// 设置对焦模式为手动对焦

self.device.focusMode = AVCaptureFocusModeAutoFocus;

// 设置对焦点

self.device.focusPointOfInterest = point;

// 释放配置锁

[self.device unlockForConfiguration];

}

#pragma mark:- action

- (void)capture {

// 获取摄像头输出

AVCaptureStillImageOutput *output = [self.session.outputs firstObject];

// 获取摄像头输出的图像

[output captureStillImageAsynchronouslyFromConnection:[output.connections firstObject] completionHandler:^(CMSampleBufferRef _Nullable imageDataSampleBuffer, NSError * _Nullable error) {

if (imageDataSampleBuffer == nil) {

return;

}

// 获取图像数据

NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];

// 创建图片

UIImage *image = [UIImage imageWithData:imageData];

// 在屏幕上显示图片

UIImageView *imageView = [[UIImageView alloc] initWithImage:image];

imageView.frame = self.view.bounds;

[self.view addSubview:imageView];

}];

}

@end