問題

領(lǐng)導(dǎo)安排任務(wù)偏塞，寫個拍照功能唱蒸，界面跟系統(tǒng)拍照有點出入

拍完照片，底部顯示已拍照片灸叼，有個拍照上限[在此不論]

點擊已拍照片神汹，可以預(yù)覽庆捺、放大縮小查看

思路

系統(tǒng)拍照肯定不行了，只能定制屁魏，沒提是否拍照禁止聲音的需求[非偷拍疼燥，正經(jīng)人]

原則上能簡單就不復(fù)雜，拍磚AVCapturePhotoOutput

捋捋

首先蚁堤，你需要一塊暫時當(dāng)前場景的layer醉者，這里不提，參考上篇[iOS寫在定制相機之前]

其次披诗，定義session + photoOutput

再次撬即，定義拍照事件

最后，代理中獲得照片

上菜

• session定義 input設(shè)置

self.session = [[AVCaptureSession alloc] init];
self.session.sessionPreset = AVCaptureSessionPresetPhoto;
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
self.dInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
if ([self.session canAddInput:self.dInput]) {
    [self.session addInput:self.dInput];
}

• 拍照場景l(fā)ayer

self.preView = [[AVPreView alloc] init];
self.preView.backgroundColor = [UIColor colorWithHexs:0x3f3f3f];
self.preView.session = self.session;
[self.preView setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
[self.view addSubview:self.preView];
[self.preView mas_makeConstraints:^(MASConstraintMaker *make) {
    make.left.equalTo(self.view);
    make.top.equalTo(self.topView.mas_bottom);
    make.bottom.equalTo(self.collect.mas_top);
    make.right.equalTo(rightView.mas_left);
}];

• 設(shè)置photoOutput

self.photoOutput = [[AVCapturePhotoOutput alloc] init];
if ([self.session canAddOutput:self.photoOutput]) {
    [self.session addOutput:self.photoOutput];
}
[self.photoOutput.connections.lastObject setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];

• session start

[self.session startRunning];

• 拍照點擊

AVCapturePhotoSettings *set = [AVCapturePhotoSettings photoSettings];

[self.photoOutput capturePhotoWithSettings:set delegate:self];

• AVCapturePhotoCaptureDelegate

#pragma mark - AVCapturePhotoCaptureDelegate

- (void)captureOutput:(AVCapturePhotoOutput *)output didFinishProcessingPhoto:(AVCapturePhoto *)photo error:(NSError *)error  API_AVAILABLE(ios(11.0)){
    if (!error) {
        // 使用該方式獲取圖片呈队，可能圖片會存在旋轉(zhuǎn)問題剥槐，在使用的時候調(diào)整圖片即可
        NSData *data = [photo fileDataRepresentation];
        UIImage *image = [UIImage imageWithData:data];
        
        // 對，就是上面的image
    }
}

Game Over.

See me Tomorrow, haha