Question

我是一般的编码新手，并根据苹果和解析代码构建了一个照片部分应用。

尽管有许多尝试调整代码，但我无法将图像保存到我的解析仪表板中。你能告诉我哪里出错了吗？

我使用的代码是：

- (IBAction)showImagePickerForPhotoPicker:(id)sender
{
NSLog(@"Code shows image picker for album in APLViewController.m");
[self showImagePickerForSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

...

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
UIImage *originalImage, *editedImage, *imageToUse;

// Handle a still image picked from a photo album
if (CFStringCompare ((CFStringRef) mediaType, kUTTypeImage, 0)
    == kCFCompareEqualTo) {

    editedImage = (UIImage *) [info objectForKey:
                               UIImagePickerControllerEditedImage];
    originalImage = (UIImage *) [info objectForKey:
                                 UIImagePickerControllerOriginalImage];

    if (editedImage) {
        imageToUse = editedImage;
    } else {
        imageToUse = originalImage;

    }
    UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage];
    NSLog(@"Code reached parse save code");
    NSData *imageData = UIImagePNGRepresentation (originalImage);
    PFFile *imageFile = [PFFile fileWithName:@"image.png" data:imageData];

    PFObject *userPhoto = [PFObject objectWithClassName:@"UserPhoto"];
    userPhoto[@"imageName"] = @"My trip to Hawaii!";
    userPhoto[@"imageFile"] = imageFile;
    [userPhoto saveInBackground];
    NSLog(@"code reaches addobject to captured images array");
    [self.capturedImages addObject:image];

    UIGraphicsBeginImageContext(CGSizeMake(640, 960));
    [image drawInRect: CGRectMake(0, 0, 640, 960)];

由于

Answer 1

我认为保存过程需要在imagePicker之外。看起来应该是这样的。并且当所有事情都在周围时，应该运行完成图像。

        PFUser *profile = [PFUser currentUser];
        NSData *imageData = UIImageJPEGRepresentation(profileImage.image, 0.8);
        NSString *filename = [NSString stringWithFormat:@"%@", profile.username];
        PFFile *imageFile = [PFFile fileWithName:filename data:imageData];
       [profile setObject:imageFile forKey:@"profileimageFile"];
       [profile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
            if (!error) {
                // Show success message
            }
            else {
                // Show error message
            }       
        }];

要保存个人资料图片，您需要先选择以保存图像。在这种情况下是在currentUser。然后将您选择的图像转换为NSData文件。然后，您需要为该数据文件命名。然后你创建一个PFFile 。然后保存该文件进行解析。

获取图片的方式与此相同但反向：

PFFile *userImageFile = [PFUser currentUser][@"profileImageFile"];
[userImageFile getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
    if (!error) {
        UIImage *image = [UIImage imageWithData:imageData];
    }        
}];

解析图像保存问题

1 个答案: