簡單的使用ios內建拍照裁剪功能

標籤：

今天項目裡要用到圖片的裁剪功能,本來想找第三方,但是查了下資料,覺得如果只是要簡單的實現其實也不難,所以決定自己寫一下

// 關於圖片的選擇 //點擊要選取圖片的view的時候要彈出兩個選項,拍照和選取本地- (void)addImageClick{    [_drawlineView removeFromSuperview];    //    [self takePhotoAction];        UIAlertController *actionSheet = [UIAlertController alertControllerWithTitle:@"請選擇擷取方式" message:nil preferredStyle:UIAlertControllerStyleActionSheet];        [actionSheet addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {                // Cancel button tappped.        [self dismissViewControllerAnimated:YES completion:^{        }];    }]];        [actionSheet addAction:[UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {                // 拍攝新照片        [self takePhotoAction];            }]];        [actionSheet addAction:[UIAlertAction actionWithTitle:@"從相簿選" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {                // 從相片中讀取        [self browseAlbum];            }]];        [self presentViewController:actionSheet animated:YES completion:nil];    }//拍照//最好就是要判斷一下相機可不可用, allowsEditing是用來設定照片是否可以編輯,就是會不會出現一個框框來約束圖片的比例// sourceType  在拍照時用的 UIImagePickerControllerSourceTypeCamera  在選取圖片時用 UIImagePickerControllerSourceTypeSavedPhotosAlbum- (void)takePhotoAction {    BOOL isCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];    if (!isCamera) { //若不可用，彈出警告框        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"無可用網路攝影機" message:nil delegate:self cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];        [alert show];        return;    }    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;    imagePicker.allowsEditing = YES;    imagePicker.delegate = self;    [self presentViewController:imagePicker animated:YES completion:nil];}//不管拍照還是選取本地圖片,完成後都會調用這個方法//info 裡面放的圖片的所有資訊  UIImagePickerControllerOriginalImage這個key拿的是原圖   UIImagePickerControllerEditedImage拿的是圖片裁剪後的圖- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{    NSString *mediaType = info[@"UIImagePickerControllerMediaType"];    if ([mediaType isEqualToString:@"public.image"]) {  //判斷是否為圖片         UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];//這裡拿到圖片         //拿到圖片,你要做什麼事........         {           //do something         }         //通過判斷picker的sourceType，如果是拍照則儲存到相簿去        if (picker.sourceType == UIImagePickerControllerSourceTypeCamera) {            UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);                              }    } }- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error  contextInfo:(void *)contextInfo{    // Was there an error?    if (error != NULL)    {        // Show error message...        [WSToast showToastWithTitle:error.description duration:TOAST_VIEW_TIME completeCallBack:nil];    }    else  // No errors    {        // Show message image successfully saved        [WSToast showToastWithTitle:@"圖片已儲存" duration:TOAST_VIEW_TIME completeCallBack:nil];    }}

　　WSToast 是我項目裡面封裝的提示展示框,當然,這隻是簡單的實現裁剪,裁剪的比例是固定不變的,而且也不能多選,就是簡單的需求而已

簡單的使用ios內建拍照裁剪功能