创建在iOS的方形的观点的自定义照相机 [英] creating custom camera with square view on iOS

问题描述

我想在iOS上创建一个自定义的相机体验，下面的代码段是我的。基本上我想要通常的相机视图（即具有以下按钮：捕获，闪光，网格，前/后，取消）。但正常的摄像机和我的唯一的区别是，我想要一个正方形的预览表面;不是矩形。然后，你看到的是你得到的（所见即所得），使得没有必要的耕作;

I am trying to create a custom camera experience on iOS and the following code snippet is as far as I got. Basically I want the usual camera view (i.e. with the following buttons: capture, flash, grid, front/back, cancel). But the only difference between the normal camera and mine is that I want a square for the preview surface; not a rectangle. And then, what you see is what you get (WYSIWYG) such that there is no cropping necessary; as the user would have taken a square picture in the first place.

我也一直在看图书馆 https://github.com/danielebogo/DBCamera ，但我没有看到如何自定义到我的目的。任何帮助？非常感谢。

I have also been looking at the library https://github.com/danielebogo/DBCamera but I am not seeing how to customize it to my end. Any help? Thanks.

我的代码SO FAR：

MY CODE SO FAR:

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    //Capture Session
    AVCaptureSession *session = [[AVCaptureSession alloc]init];
    session.sessionPreset = AVCaptureSessionPresetPhoto;

    //Add device
    AVCaptureDevice *device =
    [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

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

    if (!input)
    {
        NSLog(@"No Input");
    }

    [session addInput:input];

    //Output
    AVCaptureVideoDataOutput *output = [[AVCaptureVideoDataOutput alloc] init];
    [session addOutput:output];
    output.videoSettings =
    @{ (NSString *)kCVPixelBufferPixelFormatTypeKey : @(kCVPixelFormatType_32BGRA) };

    //Preview Layer
    AVCaptureVideoPreviewLayer *previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
    UIView *myView = self.view;
    previewLayer.frame = myView.bounds;
    previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    [self.view.layer addSublayer:previewLayer];

    //Start capture session
    [session startRunning];
}

这是Xcode上单个视图项目中唯一的自定义代码

This is the only custom code in a single view project on Xcode

推荐答案

你有两个选择做你想要的，或者坚持和自定义一个 UIImagePickerController

You have two options for doing what you want, either stick with and customize a UIImagePickerController, or create your own by using the AVFoundation.

UIImagePickerController code>确实提供了一些公平的定制选项，这个类似的线程有一些很好的信息：链接。

The UIImagePickerController does provide a fair bit of customization options, and this similar thread has some good information on that: link.

如果您仍然想要自己创建，我建议浏览到Apple文档并检查这个演示项目 AVCam ：链接。但是，它的方式比你可能需要的更深入，所以我可以推荐这个视频教程：链接。

If you still want to make your own, I suggest heading over to the Apple Documentation and checking out this demo project called AVCam: link. However, it's way more in-depth than you'll probably need so I can recommend this video tutorial as well: link.

如果是最后一个选项，我想提一下，使实际摄像机 previewLayer ，您可以在 AVCaptureVideoPreviewLayer 上设置 videoGravity AVLayerVideoGravityResizeAspectFill 。

If going for the last option, I would like to mention that to make the "actual camera" fit the frame of your previewLayer, you can set the videoGravity on the AVCaptureVideoPreviewLayer to AVLayerVideoGravityResizeAspectFill.

这篇关于创建在iOS的方形的观点的自定义照相机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IT屋！