Question

如果条件为真，我试图将UITextView内容存储到核心数据对象：

    ...

    //implementation
    NSString *textActualDescription;

    ...

    //save action    

    ...

    //
     NSString *descriptionText = ToDoDescriptionTextField.text;//assign text from UITextView to descriptionText.
    [textActualDescription isEqualToString:@"Enter ToDo Description here or leave this message to enter a blank description."];//assign string to textActualDescription.

    if ([descriptionText isEqualToString:textActualDescription]){


    [favoriteThing setValue:descriptionText forKey:@"thingDescription"];//if equal.

    }
    else {
        [favoriteThing setValue:@"No description" forKey:@"thingDescription"];//if not equal.
    }
    ...
    //saving core data

应用程序完美地存储了所有其他属性，但在这种情况下，无论如何都无法识别比较，并始终采用“else”选项。默认情况下，UITextView ToDoDescriptionTextField文本与分配给“textActualDescription”的字符串相同。有什么问题？

Answer 1

textActualDescription未分配任何值。而不是：

[textActualDescription isEqualToString:@"Enter ToDo Description here or leave this message to enter a blank description."];//assign string to textActualDescription.

使用：

textActualDescription = @"Enter ToDo Description here or leave this message to enter a blank description.";//assign string to textActualDescription.

将文本字段值插入核心数据对象

1 个答案: