拍照後編輯圖像

Question

我目前正在製作iphone應用程序，用戶拍攝照片或從相冊中選擇照片，然後在圖像上放置覆蓋圖。用戶可以縮放，旋轉和保存圖像。目前，我可以拍照，或選擇一張專輯。至於疊加層，我只是使用UIImageView並將其放置在「接口」構建器中的層次結構頂部。對於相機，我正在使用此代碼：

-(IBAction)getPhoto:(id)sender { 

// Create an image picker controller 
UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init]; 


if((UIButton *) sender == choosePhotoBtn) { 
    // Set source to photo albums 
    imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; 
} 

else { 
    // Set source to camera 
    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; 
    imagePicker.showsCameraControls = YES; 
} 

// Delegate is self 
imagePicker.delegate = self; 

    // Allow editing of image 
    imagePicker.allowsEditing = YES; 

    // Show image picker 
    [self presentModalViewController:imagePicker animated: YES]; 
} 

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
// Dismiss modalviewcontroller 
[picker dismissModalViewControllerAnimated:YES]; 

// Displaying image to the imageView 
imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"]; 

// Access the uncropped image from info dictionary 
UIImage * image = [info objectForKey:@"UIImagePickerControllerOriginalImage"]; 


// Save Image 
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil); 

[picker release]; 
} 

我現在遇到的問題是在照片拍攝後編輯照片。如何自定義相機這樣的表現？：

1. 選擇或者使用相機或正從專輯

2. 一旦選定照片，覆蓋圖像將變爲一個在那裏我」我在臉上放了一個「圓圈」，照片就像面具一樣在下面。這個視圖也可以全屏編輯。你可以旋轉，縮放和移動圖像，直到你點擊完成。

我已閱讀手冊中的這一部分，但似乎無法理解如何使用它。 http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIImagePickerController_Class/UIImagePickerController/UIImagePickerController.html

希望有人能指出我正確的方向。

非常感謝。 -Hakimo

Answer 1

有辦法不改變你的代碼了：如果你想使用的圖片是編輯後，請更改

- (IBAction)takePicture:(id)sender { 
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; 
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { 
    [imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera]; 
} else { 
    [imagePicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary]; 
} 

[imagePicker setAllowsEditing:YES]; 
[imagePicker setDelegate:self]; 

//place image picker on the screen 
[self presentViewController:imagePicker animated:YES completion:nil]; 
} 

「 UIImagePickerControllerOriginalImage「改爲」UIImagePickerControllerEditedImage「，就是這樣！

Answer 2

對於Q1，是否可以實施操作表，以便用戶可以選擇使用專輯中的照片或拍攝新照片。與動作片的功能類似如下：

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { 
    if (buttonIndex == 0) { 
     picker = [[UIImagePickerController alloc]init]; 
     picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
     picker.delegate = self; 
     [self presentModalViewController:picker animated:YES]; 
     [picker release]; 
    } 

    else if (buttonIndex == 1) { 
     if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { 
      picker = [[UIImagePickerController alloc]init]; 
      picker.sourceType = UIImagePickerControllerSourceTypeCamera; 
      picker.allowsEditing = YES; 
      picker.delegate = self; 
      [self presentModalViewController:picker animated:YES]; 
      [picker release]; 
     } 
     else { 
      UIAlertView *noCameraMsg = [[UIAlertView alloc] initWithTitle:@"no camera on this phone" message:@"" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; 
      [noCameraMsg show]; 
      [noCameraMsg release]; 

     } 


}