核心數據未保存圖像的iPhone應用程序

如果我做了以下這節省了罰款：核心數據未保存圖像的iPhone應用程序

- (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"];

，但我不希望創建一個框實例每次有人選擇圖像....所以我有一個保存方法將從可變的UIImage設置tempPhoto的框圖像，像這樣：

-(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]; 

}

但它崩潰上[圖像的setValue：tempPhoto forKey：@ 「boxImage」]; 。調試器中也沒有錯誤消息。

任何建議或意見，將不勝感激:)

來源

2009-11-17 Tom G

在哪裏tempPhoto是否定義？它可以作爲參數傳入嗎？另外，你爲什麼混合風格？您可以像這樣在BoxImage上設置圖像：image.boxImage = tempPhoto; – gerry3 2009-11-17 10:47:10

噢好吧......我不知道！感謝gerry ......我只是第二個解決了這個問題.....它通過添加self.tempPhoto解決了！ – 2009-11-17 11:59:54

挫折和代碼的這麼多時間都切換到一個.self

我改變tempPhoto到self.tempPhoto :)

來源

2009-11-17 12:00:49

核心數據未保存圖像的iPhone應用程序

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