ios开发 使用系统相册和相机

iOS开发 使用系统的相册和相机

第一步，在info.plist文件中添加两个key，

相机权限

<key>NSPhotoLibraryUsageDescription</key>

<string>photoLibraryDesciption</string>

相册权限

<key>NSCameraUsageDescription</key>

<string>cameraDesciption</string>

第二步、在使用到的头文件中导入代理

UINavigationControllerDelegate, UIImagePickerControllerDelegate

第三步、使用系统提供的调用方法

UIAlertAction *a1=[UIAlertAction actionWithTitle:@"使用照相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

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

        picker.delegate = self;

        picker.allowsEditing = YES; //可编辑

        //判断是否可以打开照相机

        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){

            //摄像头

            picker.sourceType = UIImagePickerControllerSourceTypeCamera;

            [ws presentViewController:picker animated:YES completion:nil];

        }

        else{

            NSLog(@"没有摄像头");

        }

    }];

    UIAlertAction *a2=[UIAlertAction actionWithTitle:@"使用相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

       

        // 获取支持的媒体格式

        NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

        // 判断是否支持需要设置的sourceType

        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {

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

            _imagePickerController.delegate=self;

            // 1、设置图片拾取器上的sourceType

            _imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

            // 2、设置支持的媒体格式

            //_imagePickerController.mediaTypes = @[mediaTypes[0]];

            // 3、其他设置

            _imagePickerController.allowsEditing = YES; // 如果设置为NO，当用户选择了图片之后不会进入图像编辑界面。

            // 4、推送图片拾取器控制器

            [ws presentViewController:_imagePickerController animated:YES completion:^{

                NSLog(@"dakai");

            }];

        }

    }];

    UIAlertAction *a3=[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

        [alert dismissViewControllerAnimated:YES completion:nil];

    }];

    [alert addAction:a1];

    [alert addAction:a2];

    [alert addAction:a3];

第四部实现代理方法

// 拍照完成回调

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo NS_DEPRECATED_IOS(2_0, 3_0)

{

    if(picker.sourceType == UIImagePickerControllerSourceTypeCamera){

        //图片存入相册

        UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

    }

    [[WWSideslipViewController defaultWWSideVC] dismissViewControllerAnimated:YES completion:nil];

}

//进入拍摄页面点击取消按钮

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

     [[WWSideslipViewController defaultWWSideVC] dismissViewControllerAnimated:YES completion:nil];

    

}