UIPickerView 的 NumberOfRowsInComponent 正确注册我从核心数据返回的 int 16 值的问题

发布于 2024-10-01 19:07:13 字数 503 浏览 0 评论 0原文

我有一个 Book 数据实体，它有一个名为 numBooks 的 int 16 类型值作为属性。由于一切设置的方式，我实际上是在 titleForRow 中获取我需要的数字，并将该值保存到 NSNumber 类型的全局变量中。

在 titleForRow 中，我以这种方式设置全局变量：

global = book.numBooks;

如果在设置全局变量后我 NSLog，它将向控制台返回正确的数值（50，具体取决于）。但是，如果我只是将 book.numBooks 打印到控制台，则该值完全不同，100499556。

现在，问题是，当我将全局变量带回到 numberOfRowsInComponent 时，用作给定组件的行数，这个数字似乎无穷无尽。我可以滚动和滚动，但它显然无法正常工作。

uiPickerView numberOfRowsInComponent 只需要一个 int 吗？它基本上认为我传递的值是 100499556 吗？

请帮忙，谢谢！

原文

I have a Book data entity that has as an attribute an int 16 type value called numBooks. Due to the way everything is setup, I am actually grabbing the number I need inside titleForRow, and saving the value to a global variable of type NSNumber.

In titleForRow, I am setting the global in this way:

global = book.numBooks;

If I NSLog my global variable after it is set thus, it returns to the consol the proper number value (50 depending). But, if I were to just print book.numBooks to the console, the value is quite different, 100499556.

Now, the problem is that when I take my global variable back to numberOfRowsInComponent, to use as the count of rows for a given component, there is seemingly no end to the number. I can scroll and scroll and it obviously isnt working right.

Does the uiPickerView numberOfRowsInComponent only want an int? Is it basically thinking that the value I am passing it is that 100499556?

Please help, thanks!

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