前言-基于Vision和CIDetector

iOS开发中有需要让儿童保持观看距离的功能，护眼模式。

举例

大概思路

• 通过手机的摄像头小孔成像原理参数
• 将脸部的截取图片进行截取和转向
• iOS10以上用Vision，否则用CIDetector 进行识别距离

API

+ (BOOL)isSupported;

- (void)setCompleteBlock:(FDFaceDistanceBlock)block;

- (void)start;

- (void)stop;

- (void)pause;

- (void)resume;

使用

- (void)viewDidLoad {
    
    
    [super viewDidLoad];
    [self.view addSubview:self.label];
    
    __weak typeof(self) weakSelf = self;
    [FDFaceToCameraDistance startWithConfiguration:[self createFDConfig] detectBlock:^(BOOL success, NSUInteger distance) {
    
    
        NSLog(@"face distance %ld", distance);
        if(distance > 100) {
    
    
            NSLog(@"has not get you face");
        } else {
    
    
            weakSelf.label.text = [NSString stringWithFormat:@"face distance is %ld", distance];
        }
    }];
}

- (FDConfiguration *)createFDConfig {
    
    
    FDConfiguration *config = [[FDConfiguration alloc] init];
    config.repeatCount = NSIntegerMax;
    config.firstRepeatDelay = 5.0;
    config.timeInterval = 2.0;
    return config;
}

Demo

Demo地址