核心数据不保存图像iPhone应用程序

Question

如果我这样做以下可以节省罚款：

- (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"];

但是我不想每次有人选择图像时都创建一个盒子实例....所以我有一个保存方法，可以从UIImage变量tempPhoto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];

}

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

任何建议或意见，将不胜感激 ：）

Answer 1

如此多的挫折感和代码切换都变成了.self

我将tempPhoto更改为self.tempPhoto :)