1.利用的UIImagePickerController可以从系统自带的应用程序（照片\相机）中获得图片 2.设置代理，遵守代理协议 注意这个UIImagePickerController类比较特殊，需要遵守两个代理协议
@interface ViewController () <UIImagePickerControllerDelegate, UINavigationControllerDelegate>3.实现代理的方法didFinishPickingMediaWithInfo
- (void)getImageFromIpc { // 1.判断相册是否可以打开 if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) return; // 2. 创建图片选择控制器 UIImagePickerController *ipc = [[UIImagePickerController alloc] init]; /** typedef NS_ENUM(NSInteger, UIImagePickerControllerSourceType) { UIImagePickerControllerSourceTypePhotoLibrary, // 相册 UIImagePickerControllerSourceTypeCamera, // 用相机拍摄获取 UIImagePickerControllerSourceTypeSavedPhotosAlbum // 相簿 } */ // 3. 设置打开照片相册类型(显示所有相簿) ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; // ipc.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; // 照相机 // ipc.sourceType = UIImagePickerControllerSourceTypeCamera; // 4.设置代理 ipc.delegate = self; // 5.modal出这个控制器 [self presentViewController:ipc animated:YES completion:nil]; } #pragma mark -- <UIImagePickerControllerDelegate>-- // 获取图片后的操作 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info { // 销毁控制器 [picker dismissViewControllerAnimated:YES completion:nil]; // 设置图片 self.imageView.image = info[UIImagePickerControllerOriginalImage]; }