从我的照片库添加照片时出错？

Question

我在下面发布的代码有两个功能；第一个是拍照（工作正常），第二个是从库中挑选图像（不工作）。这些函数没有被正确调用。请检查我的代码，让我知道有什么问题。

提前致谢。

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
    static NSDateFormatter *dateFormatter = nil;
    NSString *stringDate = nil;
    if (dateFormatter == nil) {
        dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:@"EE, d LLLL yyyy"];
        stringDate = [dateFormatter stringFromDate:[NSDate date]];
    }
    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
        // storing to camera roll
        UIImageWriteToSavedPhotosAlbum(image,self,@selector(image:finishedSavingWithError:contextInfo:),nil);
        CGSize newSize=CGSizeMake(320, 436);
        UIGraphicsBeginImageContext(newSize);
        [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
        UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        xapp.profileImage=newImage;
        [[NSNotificationCenter defaultCenter]postNotificationName:@"addImage" object:nil];
    }

    // Commit the change.
    [self dismissModalViewControllerAnimated:YES];
}

-(void)image:(UIImage *)image finishedSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
    if (error) {
        UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle: @"Save failed"
                          message: @"Failed to save image"
                          delegate: nil
                          cancelButtonTitle:@"OK"
                          otherButtonTitles:nil];
        [alert show];
    }
}

Answer 1

你好，我只是把从照片库的相机中完全捕获图像的代码检查出来并尝试在你的项目中实现：-

-(IBAction)actionImage:(id)sender
{   
    UIActionSheet *option =[[UIActionSheet alloc]initWithTitle:@"Select" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Select Photo",@"Take Photo",nil];
    option.actionSheetStyle =UIActionSheetStyleDefault;
    [option showInView:self.view];
}

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (actionSheet.tag==2) 
    {
        [self.navigationController popViewControllerAnimated:YES];
    }
    else
    {

        UIImagePickerController * picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;

        if(buttonIndex ==0)
        {
            if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
            {       
                picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
                [self presentModalViewController:picker animated:YES];      
            }
        }
        else if(buttonIndex ==1)
        {
            if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
            {       
                picker.sourceType = UIImagePickerControllerSourceTypeCamera;
                [self presentModalViewController:picker animated:YES];      
            }
        }   
    }
}
#pragma mark - imagePickerController Delegate
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [self dismissModalViewControllerAnimated:YES];
    imgUserImage.image = [info valueForKey:@"UIImagePickerControllerOriginalImage"];    

    return;
}

注意：- 不要忘记包含相关的框架或委托。 希望它对您有所帮助，您只需使用上述方法即可：)

Answer 2

您的代码需要进行许多更改..这是从库中选择图像的代码..我认为最好给您代码而不是更正您的代码中的错误..所以，这里是代码..享受。 ..

-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
   NSString *mediaType = info[UIImagePickerControllerMediaType];

   [self dismissViewControllerAnimated:YES completion:nil];

    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        UIImage *image = info[UIImagePickerControllerOriginalImage];

        _imageView.image = image;
        if (_newMedia)
            UIImageWriteToSavedPhotosAlbum(image,
               self,
               @selector(image:finishedSavingWithError:contextInfo:),
               nil);
        }
        else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
        {
                // Code here to support video if enabled
        }
}

-(void)image:(UIImage *)image
finishedSavingWithError:(NSError *)error
contextInfo:(void *)contextInfo
{
   if (error) {
        UIAlertView *alert = [[UIAlertView alloc]
           initWithTitle: @"Save failed"
           message: @"Failed to save image"
           delegate: nil
           cancelButtonTitle:@"OK"
           otherButtonTitles:nil];
        [alert show];
   }
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
   [self dismissViewControllerAnimated:YES completion:nil];
}