ios - UIImagePicker 不允许编辑图像

Question

我尝试使用 UIImagePicker 来编辑图像，代码运行良好，但不允许编辑，这里是我的代码:

在myFile.h

@interface MyCameraPickerController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate> {

    UIImageView * imageView;
    UIButton * choosePhotoBtn;
    UIButton * takePhotoBtn;
}

@property (nonatomic, strong) IBOutlet UIImageView * imageView;
@property (nonatomic, strong) IBOutlet UIButton * choosePhotoBtn;
@property (nonatomic, strong) IBOutlet UIButton * takePhotoBtn;

-(IBAction) getPhoto:(id) sender;

现在在 myFile.m 上调用所有函数:

@synthesize imageView,choosePhotoBtn, takePhotoBtn;

-(IBAction) getPhoto:(id) sender {

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

    picker.delegate = self;

    if((UIButton *) sender == choosePhotoBtn) {

        picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

    } else {

        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }

    [self presentViewController:picker animated:YES completion:nil];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    [info objectForKey:UIImagePickerControllerEditedImage];

    imageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];

    [picker dismissViewControllerAnimated:YES completion:nil];
}

在此工作之后，我合并了两个图像，并且在代码中工作得很好(如果有人可以提供帮助的话):

- (IBAction)onSavePhoto:(id)sender{

    UIImage *bottomImage = self.imageView.image;//[UIImage imageNamed:@"bottom.png"]; //background image
    UIImage *image       = [UIImage imageNamed:@"overLay.png"]; //foreground image

    CGSize newSize = CGSizeMake(640, 640);
    UIGraphicsBeginImageContext( newSize );

    // Use existing opacity as is
    [bottomImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];

    // Apply supplied opacity if applicable
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height) blendMode:kCGBlendModeNormal alpha:1.0];

    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    UIImageWriteToSavedPhotosAlbum(newImage, nil, nil, nil);
}

我看到了我的图像，我可以拍摄照片，但我无法编辑它，有人知道吗？谢谢。

Answer 1

如果您想要内置的 UIImagePickerController 来允许编辑所选图像，只需建立 allowsEditing 属性即可:

picker.allowsEditing = YES;

稍后您可以像这样检索它:

[info objectForKey:UIImagePickerControllerEditedImage];