@UIImagePickerController 類是獲取選擇圖片和視頻的用戶接口。我們可以用這個controller選擇我們所需要的圖片和視頻。對于這個類來說比較特殊，我們不能夠任意定制，也不可以繼承生成子類。 1.當前設備是否支持使用UIImagePickerController，需要調用 ? ? ?[UIImagePickerController?isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]; 2.查看符合的媒體類型（圖片或者視頻,調用availableMediaTypesForSourceType: 方法判斷。 3.sourceType(從哪選取媒體) ???// 打開圖片庫根目錄選擇 ? ?UIImagePickerControllerSourceTypePhotoLibrary ? ?// 使用相機選擇 ? ?UIImagePickerControllerSourceTypeCamera ? ?// 打開SavedPhoto目錄選擇 ? ?UIImagePickerControllerSourceTypeSavedPhotosAlbum 4.先創建一個UIImagePickerController(可以用模態推出相冊或UIActionSheet推出) ~~~ @實現協議UIImagePickerControllerDelegate _imagePickerC = [[UIImagePickerController alloc] init]; _imagePickerC.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; _imagePickerC.allowsEditing = YES; _imagePickerC.delegate = self; [self presentModalViewController: _imagePickerC animated: YES]; ~~~ ? ? allowEditing 設置為YES，表示 允許用戶編輯圖片，否則，不允許用戶編輯。 5.兩個主要的委托方法 ~~~ // 用戶選中圖片之后的回調 - (void)imagePickerController: (UIImagePickerController *)picker didFinishPickingMediaWithInfo: (NSDictionary *)info { if (picker == picker_camera_) { //如果是 來自照相機的image，那么先保存 UIImage* original_image = [info objectForKey:@"UIImagePickerControllerOriginalImage"]; } // info dictionary keys UIKIT_EXTERN NSString *const UIImagePickerControllerMediaType; // an NSString (UTI, i.e. kUTTypeImage) UIKIT_EXTERN NSString *const UIImagePickerControllerOriginalImage; // a UIImage UIKIT_EXTERN NSString *const UIImagePickerControllerEditedImage; // a UIImage UIKIT_EXTERN NSString *const UIImagePickerControllerCropRect; // an NSValue (CGRect) UIKIT_EXTERN NSString *const UIImagePickerControllerMediaURL; // an NSURL UIKIT_EXTERN NSString *const UIImagePickerControllerReferenceURL NS_AVAILABLE_IOS(4_1); // an NSURL that references an asset in the AssetsLibrary framework UIKIT_EXTERN NSString *const UIImagePickerControllerMediaMetadata NS_AVAILABLE_IOS(4_1); // an NSDictionary containing metadata from a captured photo // 獲得編輯過的圖片 UIImage* image = [info objectForKey: @"UIImagePickerControllerEditedImage"]; // 把圖片轉成NSData類型的數據來保存文件(存入到沙盒中) NSData *imageData; // 判斷圖片是不是png格式的文件 if (UIImagePNGRepresentation(image)) { // 返回為png圖像。 imageData = UIImagePNGRepresentation(image); }else { // 返回為JPEG圖像 imageData = UIImageJPEGRepresentation(image, 1.0); } // 路徑拼接,寫入----- NSString * imageSavePath = [[[HMTMySqliteDataHandle shareInstance]saveImagesPath] stringByAppendingPathComponent:@"自定義.自定義"]; [imageData writeToFile:imageSavePath atomically:YES]; // 關閉相冊界面 [self dismissModalViewControllerAnimated:YES]; [picker release]; } // 用戶選擇取消 - (void) imagePickerControllerDidCancel: (UIImagePickerController *)picker { // 關閉相冊界面 [self dismissModalViewControllerAnimated:YES]; [picker release]; } ~~~ @[?UIImagePickerController詳解](http://blog.csdn.net/kingsley_cxz/article/details/9157093)?? @??[UIImagePickerController](http://blog.csdn.net/rhljiayou/article/details/8003939)?任海麗(3G移動/開發) @[iOS攝像頭和相冊-UIImagePickerController-淺析](http://blog.sina.com.cn/s/blog_7b9d64af0101cfd9.html)