获取相册

UIAlertController *alertCtrl = [UIAlertController alertControllerWithTitle:@"提示" message:nil preferredStyle:UIAlertControllerStyleActionSheet];

    

    UIAlertAction *cancle = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {

        //取消...

        

        //删除图片

        _sendImg = nil;

        

        [sendImgView removeFromSuperview];

        sendImgView = nil;

        

        for (int i = 0; i < 4; i++) {

            UIButton *btn = (UIButton *)[_editorBar viewWithTag:10 + i];

            btn.transform = CGAffineTransformIdentity;

        }

        

    }];

    

    UIAlertAction *photo = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

        //拍照...

        

        //判断是否有摄像头

        BOOL isCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];

        

        if (!isCamera) {

            //提示用户没有摄像头

            UIAlertController *alertCtrl = [UIAlertController alertControllerWithTitle:@"提示" message:@"没有摄像头" preferredStyle:UIAlertControllerStyleAlert];

            UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:nil];

            [alertCtrl addAction:action];

            [self presentViewController:alertCtrl animated:YES completion:nil];

            

            

            return;

        }

        

        UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

        

        //图像来源于相机

        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

        

        imagePicker.delegate = self;

        

        [self presentViewController:imagePicker animated:YES completion:nil];

        

    }];

    

    UIAlertAction *xiangce = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

        //相册

        UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

        imagePicker.delegate = self;

        //图像来源于相册

        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

        

        [self presentViewController:imagePicker animated:YES completion:nil];

    }];

    

    [alertCtrl addAction:photo];

    [alertCtrl addAction:xiangce];

    [alertCtrl addAction:cancle];

    

    [self presentViewController:alertCtrl animated:YES complet