iOS摄像头问题

国行iPhone在iOS7下获取摄像头需要进行认证，或者手动在iPhone的“设置”里对你的App开启摄像头。

在你不知道你的App是否能打开摄像头的之前，你可以根据API获取摄像头状态：

typedef enum : NSInteger {
   AVAuthorizationStatusNotDetermined = 0,
   AVAuthorizationStatusRestricted,
   AVAuthorizationStatusDenied,
   AVAuthorizationStatusAuthorized
} AVAuthorizationStatus;

// Check camera status
    AVAuthorizationStatus cameraStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    if (cameraStatus == AVAuthorizationStatusDenied) {
        NSLog(@"Denied(被拒绝了，不能打开)");
    } else if (cameraStatus == AVAuthorizationStatusAuthorized) {
        NSLog(@"Authorized(已经获得了许可)");
    } else if (cameraStatus == AVAuthorizationStatusNotDetermined) {
        NSLog(@"Not Determined(不确定是否获得了许可)");
    } else if (cameraStatus == AVAuthorizationStatusRestricted) {
        NSLog(@"Restricted(受限制：已经询问过是否获得许可但被拒绝)");
    }

祝您愉快开心 ^_^