1.修改Cam Scanner初始化失败时检测权限。

common/ScannerViewController.m

@@ -231,12 +231,45 @@
         
     } else {
         __weak typeof(self) weakself = self;
-        UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Warning" message:@"Camera access denied, please change iPad setting, allow App use camara. (setting -> privacy -> camera enable RA Image)" preferredStyle:UIAlertControllerStyleAlert];
-        UIAlertAction *action = [UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
-            [weakself dismissViewControllerAnimated:YES completion:nil];
-        }];
-        [alert addAction:action];
-        [self presentViewController:alert animated:YES completion:nil];
+//        UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Warning" message:@"Camera access denied, please change iPad setting, allow App use camara. (setting -> privacy -> camera enable RA Image)" preferredStyle:UIAlertControllerStyleAlert];
+//        UIAlertAction *action = [UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
+//            [weakself dismissViewControllerAnimated:YES completion:nil];
+//        }];
+//        [alert addAction:action];
+//        [self presentViewController:alert animated:YES completion:nil];
+        
+        if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { // 设备不可用
+            UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Warning" message:@"Camera is not available" preferredStyle:UIAlertControllerStyleAlert];
+            UIAlertAction *action = [UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
+                [weakself dismissViewControllerAnimated:YES completion:nil];
+            }];
+            [alert addAction:action];
+            [self presentViewController:alert animated:YES completion:nil];
+            return;
+        }
+        // 相机权限
+        AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
+        if (authStatus ==AVAuthorizationStatusRestricted ||//此应用程序没有被授权访问的照片数据。可能是家长控制权限
+            authStatus ==AVAuthorizationStatusDenied)  //用户已经明确否认了这一照片数据的应用程序访问
+        {
+            // 无权限 引导去开启
+//            NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
+//            if ([[UIApplication sharedApplication]canOpenURL:url]) {
+//                [[UIApplication sharedApplication]openURL:url];// 打开权限后返回应用会重启
+//            } else {
+                NSDictionary* infoDict =[[NSBundle mainBundle] infoDictionary];
+                NSString *appName = [infoDict objectForKey:@"CFBundleName"];
+                 
+                UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Warning" message:[NSString stringWithFormat:@"Camera access denied, please change %@ setting, allow App use camara. (setting -> privacy -> camera enable %@)",[UIDevice currentDevice].model,appName] preferredStyle:UIAlertControllerStyleAlert];
+                UIAlertAction *action = [UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
+                    [weakself dismissViewControllerAnimated:YES completion:nil];
+                }];
+                [alert addAction:action];
+                [self presentViewController:alert animated:YES completion:nil];
+//            }
+            return;
+        }
+        
         return;
     }