Question

如果我执行以下操作，则可以保存正常：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)selectedImage editingInfo:(NSDictionary *)editingInfo {

box = (Box *)[NSEntityDescription insertNewObjectForEntityForName:@"Box" inManagedObjectContext:managedObjectContext];


    // create an instance of a Box image, assign that instance to Box
    //set that image to the selected image from the picker
    BoxImage *image = [NSEntityDescription insertNewObjectForEntityForName:@"BoxImage" inManagedObjectContext:managedObjectContext];
    box.boxImage = image; 
    [image setValue:selectedImage forKey:@"boxImage"];

但是每次有人选择图像时我都不想创建一个盒子实例....所以我有一个保存方法，它将从UIImage变量tempPhoto中设置盒子图像，如下所示：

-(IBAction)save
{

    box = (Box *)[NSEntityDescription insertNewObjectForEntityForName:@"Box" inManagedObjectContext:managedObjectContext];

    self.tempBoxCode = self.codeField.text;
    //Set the box attributes
    [box setCode:self.tempBoxCode];

    BoxImage *image = [NSEntityDescription insertNewObjectForEntityForName:@"BoxImage" inManagedObjectContext:managedObjectContext];
    box.boxImage = image;
    [image setValue:tempPhoto forKey:@"boxImage"];


    //commit this box

    NSError *error;


    if (![managedObjectContext save:&error]) {
        // Handle the error.
    }

    [self.view removeFromSuperview];

}

但它在[image setValue：tempPhoto forKey：@“boxImage”]上崩溃了; 。调试器中也没有错误消息。

非常感谢任何建议或建议：）

Answer 1

这么多小时的挫败感和代码切换都归结为.self

我将tempPhoto更改为self.tempPhoto：）

核心数据不保存图像iphone应用程序

1 个答案: