相机预览 View

AVCamPreviewView.h

#import <UIKit/UIKit.h>
#import <AVFoundation/AVCaptureSession.h>

@interface AVCamPreviewView : UIView

@property (nonatomic, readonly) AVCaptureVideoPreviewLayer *videoPreviewLayer;

@property (nonatomic) AVCaptureSession *session;

@end

AVCamPreviewView.m

#import "AVCamPreviewView.h"
#import <AVFoundation/AVFoundation.h>

@implementation AVCamPreviewView


+ (Class)layerClass
{
    return [AVCaptureVideoPreviewLayer class];
}

- (AVCaptureVideoPreviewLayer *)videoPreviewLayer
{
    return (AVCaptureVideoPreviewLayer *)self.layer;
}

- (AVCaptureSession *)session
{
    return self.videoPreviewLayer.session;
}

- (void)setSession:(AVCaptureSession *)session
{
    self.videoPreviewLayer.session = session;
}


@end